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arch-linux-kernel/dib0700-fix.patch

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Fix FS#19234, FS#26674, FS#25939, FS#26528 and a wrong drm error
2011-10-31 22:26:29 +01:00
commit 198c545cd7306dc90aaae1d61e64175e70a70dc8
Author: Patrick Boettcher <Patrick.Boettcher@dibcom.fr>
Date: Wed Aug 3 17:08:21 2011 +0200
[media] DiBcom: protect the I2C bufer access
This patch protect the I2C buffer access in order to manage concurrent
access. This protection is done using mutex.
Furthermore, for the dib9000, if a pid filtering command is
received during the tuning, this pid filtering command is delayed to
avoid any concurrent access issue.
Cc: Mauro Carvalho Chehab <mchehab@redhat.com>
Cc: Florian Mickler <florian@mickler.org>
Cc: stable@kernel.org
Signed-off-by: Olivier Grenie <olivier.grenie@dibcom.fr>
Signed-off-by: Patrick Boettcher <Patrick.Boettcher@dibcom.fr>
diff --git a/drivers/media/dvb/frontends/dib0070.c b/drivers/media/dvb/frontends/dib0070.c
index 1d47d4d..dc1cb17 100644
--- a/drivers/media/dvb/frontends/dib0070.c
+++ b/drivers/media/dvb/frontends/dib0070.c
@@ -27,6 +27,7 @@
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/i2c.h>
+#include <linux/mutex.h>
#include "dvb_frontend.h"
@@ -78,10 +79,18 @@ struct dib0070_state {
struct i2c_msg msg[2];
u8 i2c_write_buffer[3];
u8 i2c_read_buffer[2];
+ struct mutex i2c_buffer_lock;
};
-static uint16_t dib0070_read_reg(struct dib0070_state *state, u8 reg)
+static u16 dib0070_read_reg(struct dib0070_state *state, u8 reg)
{
+ u16 ret;
+
+ if (mutex_lock_interruptible(&state->i2c_buffer_lock) < 0) {
+ dprintk("could not acquire lock");
+ return 0;
+ }
+
state->i2c_write_buffer[0] = reg;
memset(state->msg, 0, 2 * sizeof(struct i2c_msg));
@@ -96,13 +105,23 @@ static uint16_t dib0070_read_reg(struct dib0070_state *state, u8 reg)
if (i2c_transfer(state->i2c, state->msg, 2) != 2) {
printk(KERN_WARNING "DiB0070 I2C read failed\n");
- return 0;
- }
- return (state->i2c_read_buffer[0] << 8) | state->i2c_read_buffer[1];
+ ret = 0;
+ } else
+ ret = (state->i2c_read_buffer[0] << 8)
+ | state->i2c_read_buffer[1];
+
+ mutex_unlock(&state->i2c_buffer_lock);
+ return ret;
}
static int dib0070_write_reg(struct dib0070_state *state, u8 reg, u16 val)
{
+ int ret;
+
+ if (mutex_lock_interruptible(&state->i2c_buffer_lock) < 0) {
+ dprintk("could not acquire lock");
+ return -EINVAL;
+ }
state->i2c_write_buffer[0] = reg;
state->i2c_write_buffer[1] = val >> 8;
state->i2c_write_buffer[2] = val & 0xff;
@@ -115,9 +134,12 @@ static int dib0070_write_reg(struct dib0070_state *state, u8 reg, u16 val)
if (i2c_transfer(state->i2c, state->msg, 1) != 1) {
printk(KERN_WARNING "DiB0070 I2C write failed\n");
- return -EREMOTEIO;
- }
- return 0;
+ ret = -EREMOTEIO;
+ } else
+ ret = 0;
+
+ mutex_unlock(&state->i2c_buffer_lock);
+ return ret;
}
#define HARD_RESET(state) do { \
@@ -734,6 +756,7 @@ struct dvb_frontend *dib0070_attach(struct dvb_frontend *fe, struct i2c_adapter
state->cfg = cfg;
state->i2c = i2c;
state->fe = fe;
+ mutex_init(&state->i2c_buffer_lock);
fe->tuner_priv = state;
if (dib0070_reset(fe) != 0)
diff --git a/drivers/media/dvb/frontends/dib0090.c b/drivers/media/dvb/frontends/dib0090.c
index c9c935a..b174d1c 100644
--- a/drivers/media/dvb/frontends/dib0090.c
+++ b/drivers/media/dvb/frontends/dib0090.c
@@ -27,6 +27,7 @@
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/i2c.h>
+#include <linux/mutex.h>
#include "dvb_frontend.h"
@@ -196,6 +197,7 @@ struct dib0090_state {
struct i2c_msg msg[2];
u8 i2c_write_buffer[3];
u8 i2c_read_buffer[2];
+ struct mutex i2c_buffer_lock;
};
struct dib0090_fw_state {
@@ -208,10 +210,18 @@ struct dib0090_fw_state {
struct i2c_msg msg;
u8 i2c_write_buffer[2];
u8 i2c_read_buffer[2];
+ struct mutex i2c_buffer_lock;
};
static u16 dib0090_read_reg(struct dib0090_state *state, u8 reg)
{
+ u16 ret;
+
+ if (mutex_lock_interruptible(&state->i2c_buffer_lock) < 0) {
+ dprintk("could not acquire lock");
+ return 0;
+ }
+
state->i2c_write_buffer[0] = reg;
memset(state->msg, 0, 2 * sizeof(struct i2c_msg));
@@ -226,14 +236,24 @@ static u16 dib0090_read_reg(struct dib0090_state *state, u8 reg)
if (i2c_transfer(state->i2c, state->msg, 2) != 2) {
printk(KERN_WARNING "DiB0090 I2C read failed\n");
- return 0;
- }
+ ret = 0;
+ } else
+ ret = (state->i2c_read_buffer[0] << 8)
+ | state->i2c_read_buffer[1];
- return (state->i2c_read_buffer[0] << 8) | state->i2c_read_buffer[1];
+ mutex_unlock(&state->i2c_buffer_lock);
+ return ret;
}
static int dib0090_write_reg(struct dib0090_state *state, u32 reg, u16 val)
{
+ int ret;
+
+ if (mutex_lock_interruptible(&state->i2c_buffer_lock) < 0) {
+ dprintk("could not acquire lock");
+ return -EINVAL;
+ }
+
state->i2c_write_buffer[0] = reg & 0xff;
state->i2c_write_buffer[1] = val >> 8;
state->i2c_write_buffer[2] = val & 0xff;
@@ -246,13 +266,23 @@ static int dib0090_write_reg(struct dib0090_state *state, u32 reg, u16 val)
if (i2c_transfer(state->i2c, state->msg, 1) != 1) {
printk(KERN_WARNING "DiB0090 I2C write failed\n");
- return -EREMOTEIO;
- }
- return 0;
+ ret = -EREMOTEIO;
+ } else
+ ret = 0;
+
+ mutex_unlock(&state->i2c_buffer_lock);
+ return ret;
}
static u16 dib0090_fw_read_reg(struct dib0090_fw_state *state, u8 reg)
{
+ u16 ret;
+
+ if (mutex_lock_interruptible(&state->i2c_buffer_lock) < 0) {
+ dprintk("could not acquire lock");
+ return 0;
+ }
+
state->i2c_write_buffer[0] = reg;
memset(&state->msg, 0, sizeof(struct i2c_msg));
@@ -262,13 +292,24 @@ static u16 dib0090_fw_read_reg(struct dib0090_fw_state *state, u8 reg)
state->msg.len = 2;
if (i2c_transfer(state->i2c, &state->msg, 1) != 1) {
printk(KERN_WARNING "DiB0090 I2C read failed\n");
- return 0;
- }
- return (state->i2c_read_buffer[0] << 8) | state->i2c_read_buffer[1];
+ ret = 0;
+ } else
+ ret = (state->i2c_read_buffer[0] << 8)
+ | state->i2c_read_buffer[1];
+
+ mutex_unlock(&state->i2c_buffer_lock);
+ return ret;
}
static int dib0090_fw_write_reg(struct dib0090_fw_state *state, u8 reg, u16 val)
{
+ int ret;
+
+ if (mutex_lock_interruptible(&state->i2c_buffer_lock) < 0) {
+ dprintk("could not acquire lock");
+ return -EINVAL;
+ }
+
state->i2c_write_buffer[0] = val >> 8;
state->i2c_write_buffer[1] = val & 0xff;
@@ -279,9 +320,12 @@ static int dib0090_fw_write_reg(struct dib0090_fw_state *state, u8 reg, u16 val)
state->msg.len = 2;
if (i2c_transfer(state->i2c, &state->msg, 1) != 1) {
printk(KERN_WARNING "DiB0090 I2C write failed\n");
- return -EREMOTEIO;
- }
- return 0;
+ ret = -EREMOTEIO;
+ } else
+ ret = 0;
+
+ mutex_unlock(&state->i2c_buffer_lock);
+ return ret;
}
#define HARD_RESET(state) do { if (cfg->reset) { if (cfg->sleep) cfg->sleep(fe, 0); msleep(10); cfg->reset(fe, 1); msleep(10); cfg->reset(fe, 0); msleep(10); } } while (0)
@@ -2440,6 +2484,7 @@ struct dvb_frontend *dib0090_register(struct dvb_frontend *fe, struct i2c_adapte
st->config = config;
st->i2c = i2c;
st->fe = fe;
+ mutex_init(&st->i2c_buffer_lock);
fe->tuner_priv = st;
if (config->wbd == NULL)
@@ -2471,6 +2516,7 @@ struct dvb_frontend *dib0090_fw_register(struct dvb_frontend *fe, struct i2c_ada
st->config = config;
st->i2c = i2c;
st->fe = fe;
+ mutex_init(&st->i2c_buffer_lock);
fe->tuner_priv = st;
if (dib0090_fw_reset_digital(fe, st->config) != 0)
diff --git a/drivers/media/dvb/frontends/dib7000m.c b/drivers/media/dvb/frontends/dib7000m.c
index 79cb1c2..dbb76d7 100644
--- a/drivers/media/dvb/frontends/dib7000m.c
+++ b/drivers/media/dvb/frontends/dib7000m.c
@@ -11,6 +11,7 @@
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/i2c.h>
+#include <linux/mutex.h>
#include "dvb_frontend.h"
@@ -55,6 +56,7 @@ struct dib7000m_state {
struct i2c_msg msg[2];
u8 i2c_write_buffer[4];
u8 i2c_read_buffer[2];
+ struct mutex i2c_buffer_lock;
};
enum dib7000m_power_mode {
@@ -69,6 +71,13 @@ enum dib7000m_power_mode {
static u16 dib7000m_read_word(struct dib7000m_state *state, u16 reg)
{
+ u16 ret;
+
+ if (mutex_lock_interruptible(&state->i2c_buffer_lock) < 0) {
+ dprintk("could not acquire lock");
+ return 0;
+ }
+
state->i2c_write_buffer[0] = (reg >> 8) | 0x80;
state->i2c_write_buffer[1] = reg & 0xff;
@@ -85,11 +94,21 @@ static u16 dib7000m_read_word(struct dib7000m_state *state, u16 reg)
if (i2c_transfer(state->i2c_adap, state->msg, 2) != 2)
dprintk("i2c read error on %d",reg);
- return (state->i2c_read_buffer[0] << 8) | state->i2c_read_buffer[1];
+ ret = (state->i2c_read_buffer[0] << 8) | state->i2c_read_buffer[1];
+ mutex_unlock(&state->i2c_buffer_lock);
+
+ return ret;
}
static int dib7000m_write_word(struct dib7000m_state *state, u16 reg, u16 val)
{
+ int ret;
+
+ if (mutex_lock_interruptible(&state->i2c_buffer_lock) < 0) {
+ dprintk("could not acquire lock");
+ return -EINVAL;
+ }
+
state->i2c_write_buffer[0] = (reg >> 8) & 0xff;
state->i2c_write_buffer[1] = reg & 0xff;
state->i2c_write_buffer[2] = (val >> 8) & 0xff;
@@ -101,7 +120,10 @@ static int dib7000m_write_word(struct dib7000m_state *state, u16 reg, u16 val)
state->msg[0].buf = state->i2c_write_buffer;
state->msg[0].len = 4;
- return i2c_transfer(state->i2c_adap, state->msg, 1) != 1 ? -EREMOTEIO : 0;
+ ret = (i2c_transfer(state->i2c_adap, state->msg, 1) != 1 ?
+ -EREMOTEIO : 0);
+ mutex_unlock(&state->i2c_buffer_lock);
+ return ret;
}
static void dib7000m_write_tab(struct dib7000m_state *state, u16 *buf)
{
@@ -1385,6 +1407,7 @@ struct dvb_frontend * dib7000m_attach(struct i2c_adapter *i2c_adap, u8 i2c_addr,
demod = &st->demod;
demod->demodulator_priv = st;
memcpy(&st->demod.ops, &dib7000m_ops, sizeof(struct dvb_frontend_ops));
+ mutex_init(&st->i2c_buffer_lock);
st->timf_default = cfg->bw->timf;
diff --git a/drivers/media/dvb/frontends/dib7000p.c b/drivers/media/dvb/frontends/dib7000p.c
index 0c9f40c..292bc19 100644
--- a/drivers/media/dvb/frontends/dib7000p.c
+++ b/drivers/media/dvb/frontends/dib7000p.c
@@ -10,6 +10,7 @@
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/i2c.h>
+#include <linux/mutex.h>
#include "dvb_math.h"
#include "dvb_frontend.h"
@@ -68,6 +69,7 @@ struct dib7000p_state {
struct i2c_msg msg[2];
u8 i2c_write_buffer[4];
u8 i2c_read_buffer[2];
+ struct mutex i2c_buffer_lock;
};
enum dib7000p_power_mode {
@@ -81,6 +83,13 @@ static int dib7090_set_diversity_in(struct dvb_frontend *fe, int onoff);
static u16 dib7000p_read_word(struct dib7000p_state *state, u16 reg)
{
+ u16 ret;
+
+ if (mutex_lock_interruptible(&state->i2c_buffer_lock) < 0) {
+ dprintk("could not acquire lock");
+ return 0;
+ }
+
state->i2c_write_buffer[0] = reg >> 8;
state->i2c_write_buffer[1] = reg & 0xff;
@@ -97,11 +106,20 @@ static u16 dib7000p_read_word(struct dib7000p_state *state, u16 reg)
if (i2c_transfer(state->i2c_adap, state->msg, 2) != 2)
dprintk("i2c read error on %d", reg);
- return (state->i2c_read_buffer[0] << 8) | state->i2c_read_buffer[1];
+ ret = (state->i2c_read_buffer[0] << 8) | state->i2c_read_buffer[1];
+ mutex_unlock(&state->i2c_buffer_lock);
+ return ret;
}
static int dib7000p_write_word(struct dib7000p_state *state, u16 reg, u16 val)
{
+ int ret;
+
+ if (mutex_lock_interruptible(&state->i2c_buffer_lock) < 0) {
+ dprintk("could not acquire lock");
+ return -EINVAL;
+ }
+
state->i2c_write_buffer[0] = (reg >> 8) & 0xff;
state->i2c_write_buffer[1] = reg & 0xff;
state->i2c_write_buffer[2] = (val >> 8) & 0xff;
@@ -113,7 +131,10 @@ static int dib7000p_write_word(struct dib7000p_state *state, u16 reg, u16 val)
state->msg[0].buf = state->i2c_write_buffer;
state->msg[0].len = 4;
- return i2c_transfer(state->i2c_adap, state->msg, 1) != 1 ? -EREMOTEIO : 0;
+ ret = (i2c_transfer(state->i2c_adap, state->msg, 1) != 1 ?
+ -EREMOTEIO : 0);
+ mutex_unlock(&state->i2c_buffer_lock);
+ return ret;
}
static void dib7000p_write_tab(struct dib7000p_state *state, u16 * buf)
@@ -1646,6 +1667,7 @@ int dib7000p_i2c_enumeration(struct i2c_adapter *i2c, int no_of_demods, u8 defau
return -ENOMEM;
dpst->i2c_adap = i2c;
+ mutex_init(&dpst->i2c_buffer_lock);
for (k = no_of_demods - 1; k >= 0; k--) {
dpst->cfg = cfg[k];
@@ -2324,6 +2346,7 @@ struct dvb_frontend *dib7000p_attach(struct i2c_adapter *i2c_adap, u8 i2c_addr,
demod = &st->demod;
demod->demodulator_priv = st;
memcpy(&st->demod.ops, &dib7000p_ops, sizeof(struct dvb_frontend_ops));
+ mutex_init(&st->i2c_buffer_lock);
dib7000p_write_word(st, 1287, 0x0003); /* sram lead in, rdy */
@@ -2333,8 +2356,9 @@ struct dvb_frontend *dib7000p_attach(struct i2c_adapter *i2c_adap, u8 i2c_addr,
st->version = dib7000p_read_word(st, 897);
/* FIXME: make sure the dev.parent field is initialized, or else
- request_firmware() will hit an OOPS (this should be moved somewhere
- more common) */
+ request_firmware() will hit an OOPS (this should be moved somewhere
+ more common) */
+ st->i2c_master.gated_tuner_i2c_adap.dev.parent = i2c_adap->dev.parent;
dibx000_init_i2c_master(&st->i2c_master, DIB7000P, st->i2c_adap, st->i2c_addr);
diff --git a/drivers/media/dvb/frontends/dib8000.c b/drivers/media/dvb/frontends/dib8000.c
index 7d2ea11..fe284d5 100644
--- a/drivers/media/dvb/frontends/dib8000.c
+++ b/drivers/media/dvb/frontends/dib8000.c
@@ -10,6 +10,8 @@
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/i2c.h>
+#include <linux/mutex.h>
+
#include "dvb_math.h"
#include "dvb_frontend.h"
@@ -37,6 +39,7 @@ struct i2c_device {
u8 addr;
u8 *i2c_write_buffer;
u8 *i2c_read_buffer;
+ struct mutex *i2c_buffer_lock;
};
struct dib8000_state {
@@ -77,6 +80,7 @@ struct dib8000_state {
struct i2c_msg msg[2];
u8 i2c_write_buffer[4];
u8 i2c_read_buffer[2];
+ struct mutex i2c_buffer_lock;
};
enum dib8000_power_mode {
@@ -86,24 +90,39 @@ enum dib8000_power_mode {
static u16 dib8000_i2c_read16(struct i2c_device *i2c, u16 reg)
{
+ u16 ret;
struct i2c_msg msg[2] = {
- {.addr = i2c->addr >> 1, .flags = 0,
- .buf = i2c->i2c_write_buffer, .len = 2},
- {.addr = i2c->addr >> 1, .flags = I2C_M_RD,
- .buf = i2c->i2c_read_buffer, .len = 2},
+ {.addr = i2c->addr >> 1, .flags = 0, .len = 2},
+ {.addr = i2c->addr >> 1, .flags = I2C_M_RD, .len = 2},
};
+ if (mutex_lock_interruptible(i2c->i2c_buffer_lock) < 0) {
+ dprintk("could not acquire lock");
+ return 0;
+ }
+
+ msg[0].buf = i2c->i2c_write_buffer;
msg[0].buf[0] = reg >> 8;
msg[0].buf[1] = reg & 0xff;
+ msg[1].buf = i2c->i2c_read_buffer;
if (i2c_transfer(i2c->adap, msg, 2) != 2)
dprintk("i2c read error on %d", reg);
- return (msg[1].buf[0] << 8) | msg[1].buf[1];
+ ret = (msg[1].buf[0] << 8) | msg[1].buf[1];
+ mutex_unlock(i2c->i2c_buffer_lock);
+ return ret;
}
static u16 dib8000_read_word(struct dib8000_state *state, u16 reg)
{
+ u16 ret;
+
+ if (mutex_lock_interruptible(&state->i2c_buffer_lock) < 0) {
+ dprintk("could not acquire lock");
+ return 0;
+ }
+
state->i2c_write_buffer[0] = reg >> 8;
state->i2c_write_buffer[1] = reg & 0xff;
@@ -120,7 +139,10 @@ static u16 dib8000_read_word(struct dib8000_state *state, u16 reg)
if (i2c_transfer(state->i2c.adap, state->msg, 2) != 2)
dprintk("i2c read error on %d", reg);
- return (state->i2c_read_buffer[0] << 8) | state->i2c_read_buffer[1];
+ ret = (state->i2c_read_buffer[0] << 8) | state->i2c_read_buffer[1];
+ mutex_unlock(&state->i2c_buffer_lock);
+
+ return ret;
}
static u32 dib8000_read32(struct dib8000_state *state, u16 reg)
@@ -135,22 +157,35 @@ static u32 dib8000_read32(struct dib8000_state *state, u16 reg)
static int dib8000_i2c_write16(struct i2c_device *i2c, u16 reg, u16 val)
{
- struct i2c_msg msg = {.addr = i2c->addr >> 1, .flags = 0,
- .buf = i2c->i2c_write_buffer, .len = 4};
+ struct i2c_msg msg = {.addr = i2c->addr >> 1, .flags = 0, .len = 4};
int ret = 0;
+ if (mutex_lock_interruptible(i2c->i2c_buffer_lock) < 0) {
+ dprintk("could not acquire lock");
+ return -EINVAL;
+ }
+
+ msg.buf = i2c->i2c_write_buffer;
msg.buf[0] = (reg >> 8) & 0xff;
msg.buf[1] = reg & 0xff;
msg.buf[2] = (val >> 8) & 0xff;
msg.buf[3] = val & 0xff;
ret = i2c_transfer(i2c->adap, &msg, 1) != 1 ? -EREMOTEIO : 0;
+ mutex_unlock(i2c->i2c_buffer_lock);
return ret;
}
static int dib8000_write_word(struct dib8000_state *state, u16 reg, u16 val)
{
+ int ret;
+
+ if (mutex_lock_interruptible(&state->i2c_buffer_lock) < 0) {
+ dprintk("could not acquire lock");
+ return -EINVAL;
+ }
+
state->i2c_write_buffer[0] = (reg >> 8) & 0xff;
state->i2c_write_buffer[1] = reg & 0xff;
state->i2c_write_buffer[2] = (val >> 8) & 0xff;
@@ -162,7 +197,11 @@ static int dib8000_write_word(struct dib8000_state *state, u16 reg, u16 val)
state->msg[0].buf = state->i2c_write_buffer;
state->msg[0].len = 4;
- return i2c_transfer(state->i2c.adap, state->msg, 1) != 1 ? -EREMOTEIO : 0;
+ ret = (i2c_transfer(state->i2c.adap, state->msg, 1) != 1 ?
+ -EREMOTEIO : 0);
+ mutex_unlock(&state->i2c_buffer_lock);
+
+ return ret;
}
static const s16 coeff_2k_sb_1seg_dqpsk[8] = {
@@ -2434,8 +2473,15 @@ int dib8000_i2c_enumeration(struct i2c_adapter *host, int no_of_demods, u8 defau
if (!client.i2c_read_buffer) {
dprintk("%s: not enough memory", __func__);
ret = -ENOMEM;
- goto error_memory;
+ goto error_memory_read;
+ }
+ client.i2c_buffer_lock = kzalloc(sizeof(struct mutex), GFP_KERNEL);
+ if (!client.i2c_buffer_lock) {
+ dprintk("%s: not enough memory", __func__);
+ ret = -ENOMEM;
+ goto error_memory_lock;
}
+ mutex_init(client.i2c_buffer_lock);
for (k = no_of_demods - 1; k >= 0; k--) {
/* designated i2c address */
@@ -2476,8 +2522,10 @@ int dib8000_i2c_enumeration(struct i2c_adapter *host, int no_of_demods, u8 defau
}
error:
+ kfree(client.i2c_buffer_lock);
+error_memory_lock:
kfree(client.i2c_read_buffer);
-error_memory:
+error_memory_read:
kfree(client.i2c_write_buffer);
return ret;
@@ -2581,6 +2629,8 @@ struct dvb_frontend *dib8000_attach(struct i2c_adapter *i2c_adap, u8 i2c_addr, s
state->i2c.addr = i2c_addr;
state->i2c.i2c_write_buffer = state->i2c_write_buffer;
state->i2c.i2c_read_buffer = state->i2c_read_buffer;
+ mutex_init(&state->i2c_buffer_lock);
+ state->i2c.i2c_buffer_lock = &state->i2c_buffer_lock;
state->gpio_val = cfg->gpio_val;
state->gpio_dir = cfg->gpio_dir;
diff --git a/drivers/media/dvb/frontends/dib9000.c b/drivers/media/dvb/frontends/dib9000.c
index a085588..b931074 100644
--- a/drivers/media/dvb/frontends/dib9000.c
+++ b/drivers/media/dvb/frontends/dib9000.c
@@ -38,6 +38,15 @@ struct i2c_device {
#define DibInitLock(lock) mutex_init(lock)
#define DibFreeLock(lock)
+struct dib9000_pid_ctrl {
+#define DIB9000_PID_FILTER_CTRL 0
+#define DIB9000_PID_FILTER 1
+ u8 cmd;
+ u8 id;
+ u16 pid;
+ u8 onoff;
+};
+
struct dib9000_state {
struct i2c_device i2c;
@@ -99,6 +108,10 @@ struct dib9000_state {
struct i2c_msg msg[2];
u8 i2c_write_buffer[255];
u8 i2c_read_buffer[255];
+ DIB_LOCK demod_lock;
+ u8 get_frontend_internal;
+ struct dib9000_pid_ctrl pid_ctrl[10];
+ s8 pid_ctrl_index; /* -1: empty list; -2: do not use the list */
};
static const u32 fe_info[44] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
@@ -1743,19 +1756,56 @@ EXPORT_SYMBOL(dib9000_set_gpio);
int dib9000_fw_pid_filter_ctrl(struct dvb_frontend *fe, u8 onoff)
{
struct dib9000_state *state = fe->demodulator_priv;
- u16 val = dib9000_read_word(state, 294 + 1) & 0xffef;
+ u16 val;
+ int ret;
+
+ if ((state->pid_ctrl_index != -2) && (state->pid_ctrl_index < 9)) {
+ /* postpone the pid filtering cmd */
+ dprintk("pid filter cmd postpone");
+ state->pid_ctrl_index++;
+ state->pid_ctrl[state->pid_ctrl_index].cmd = DIB9000_PID_FILTER_CTRL;
+ state->pid_ctrl[state->pid_ctrl_index].onoff = onoff;
+ return 0;
+ }
+
+ DibAcquireLock(&state->demod_lock);
+
+ val = dib9000_read_word(state, 294 + 1) & 0xffef;
val |= (onoff & 0x1) << 4;
dprintk("PID filter enabled %d", onoff);
- return dib9000_write_word(state, 294 + 1, val);
+ ret = dib9000_write_word(state, 294 + 1, val);
+ DibReleaseLock(&state->demod_lock);
+ return ret;
+
}
EXPORT_SYMBOL(dib9000_fw_pid_filter_ctrl);
int dib9000_fw_pid_filter(struct dvb_frontend *fe, u8 id, u16 pid, u8 onoff)
{
struct dib9000_state *state = fe->demodulator_priv;
+ int ret;
+
+ if (state->pid_ctrl_index != -2) {
+ /* postpone the pid filtering cmd */
+ dprintk("pid filter postpone");
+ if (state->pid_ctrl_index < 9) {
+ state->pid_ctrl_index++;
+ state->pid_ctrl[state->pid_ctrl_index].cmd = DIB9000_PID_FILTER;
+ state->pid_ctrl[state->pid_ctrl_index].id = id;
+ state->pid_ctrl[state->pid_ctrl_index].pid = pid;
+ state->pid_ctrl[state->pid_ctrl_index].onoff = onoff;
+ } else
+ dprintk("can not add any more pid ctrl cmd");
+ return 0;
+ }
+
+ DibAcquireLock(&state->demod_lock);
dprintk("Index %x, PID %d, OnOff %d", id, pid, onoff);
- return dib9000_write_word(state, 300 + 1 + id, onoff ? (1 << 13) | pid : 0);
+ ret = dib9000_write_word(state, 300 + 1 + id,
+ onoff ? (1 << 13) | pid : 0);
+ DibReleaseLock(&state->demod_lock);
+ return ret;
}
EXPORT_SYMBOL(dib9000_fw_pid_filter);
@@ -1778,6 +1828,7 @@ static void dib9000_release(struct dvb_frontend *demod)
DibFreeLock(&state->platform.risc.mbx_lock);
DibFreeLock(&state->platform.risc.mem_lock);
DibFreeLock(&state->platform.risc.mem_mbx_lock);
+ DibFreeLock(&state->demod_lock);
dibx000_exit_i2c_master(&st->i2c_master);
i2c_del_adapter(&st->tuner_adap);
@@ -1795,14 +1846,19 @@ static int dib9000_sleep(struct dvb_frontend *fe)
{
struct dib9000_state *state = fe->demodulator_priv;
u8 index_frontend;
- int ret;
+ int ret = 0;
+ DibAcquireLock(&state->demod_lock);
for (index_frontend = 1; (index_frontend < MAX_NUMBER_OF_FRONTENDS) && (state->fe[index_frontend] != NULL); index_frontend++) {
ret = state->fe[index_frontend]->ops.sleep(state->fe[index_frontend]);
if (ret < 0)
- return ret;
+ goto error;
}
- return dib9000_mbx_send(state, OUT_MSG_FE_SLEEP, NULL, 0);
+ ret = dib9000_mbx_send(state, OUT_MSG_FE_SLEEP, NULL, 0);
+
+error:
+ DibReleaseLock(&state->demod_lock);
+ return ret;
}
static int dib9000_fe_get_tune_settings(struct dvb_frontend *fe, struct dvb_frontend_tune_settings *tune)
@@ -1816,7 +1872,10 @@ static int dib9000_get_frontend(struct dvb_frontend *fe, struct dvb_frontend_par
struct dib9000_state *state = fe->demodulator_priv;
u8 index_frontend, sub_index_frontend;
fe_status_t stat;
- int ret;
+ int ret = 0;
+
+ if (state->get_frontend_internal == 0)
+ DibAcquireLock(&state->demod_lock);
for (index_frontend = 1; (index_frontend < MAX_NUMBER_OF_FRONTENDS) && (state->fe[index_frontend] != NULL); index_frontend++) {
state->fe[index_frontend]->ops.read_status(state->fe[index_frontend], &stat);
@@ -1846,14 +1905,15 @@ static int dib9000_get_frontend(struct dvb_frontend *fe, struct dvb_frontend_par
state->fe[index_frontend]->dtv_property_cache.rolloff;
}
}
- return 0;
+ ret = 0;
+ goto return_value;
}
}
/* get the channel from master chip */
ret = dib9000_fw_get_channel(fe, fep);
if (ret != 0)
- return ret;
+ goto return_value;
/* synchronize the cache with the other frontends */
for (index_frontend = 1; (index_frontend < MAX_NUMBER_OF_FRONTENDS) && (state->fe[index_frontend] != NULL); index_frontend++) {
@@ -1866,8 +1926,12 @@ static int dib9000_get_frontend(struct dvb_frontend *fe, struct dvb_frontend_par
state->fe[index_frontend]->dtv_property_cache.code_rate_LP = fe->dtv_property_cache.code_rate_LP;
state->fe[index_frontend]->dtv_property_cache.rolloff = fe->dtv_property_cache.rolloff;
}
+ ret = 0;
- return 0;
+return_value:
+ if (state->get_frontend_internal == 0)
+ DibReleaseLock(&state->demod_lock);
+ return ret;
}
static int dib9000_set_tune_state(struct dvb_frontend *fe, enum frontend_tune_state tune_state)
@@ -1912,6 +1976,10 @@ static int dib9000_set_frontend(struct dvb_frontend *fe, struct dvb_frontend_par
dprintk("dib9000: must specify bandwidth ");
return 0;
}
+
+ state->pid_ctrl_index = -1; /* postpone the pid filtering cmd */
+ DibAcquireLock(&state->demod_lock);
+
fe->dtv_property_cache.delivery_system = SYS_DVBT;
/* set the master status */
@@ -1974,13 +2042,18 @@ static int dib9000_set_frontend(struct dvb_frontend *fe, struct dvb_frontend_par
/* check the tune result */
if (exit_condition == 1) { /* tune failed */
dprintk("tune failed");
+ DibReleaseLock(&state->demod_lock);
+ /* tune failed; put all the pid filtering cmd to junk */
+ state->pid_ctrl_index = -1;
return 0;
}
dprintk("tune success on frontend%i", index_frontend_success);
/* synchronize all the channel cache */
+ state->get_frontend_internal = 1;
dib9000_get_frontend(state->fe[0], fep);
+ state->get_frontend_internal = 0;
/* retune the other frontends with the found channel */
channel_status.status = CHANNEL_STATUS_PARAMETERS_SET;
@@ -2025,6 +2098,28 @@ static int dib9000_set_frontend(struct dvb_frontend *fe, struct dvb_frontend_par
/* turn off the diversity for the last frontend */
dib9000_fw_set_diversity_in(state->fe[index_frontend - 1], 0);
+ DibReleaseLock(&state->demod_lock);
+ if (state->pid_ctrl_index >= 0) {
+ u8 index_pid_filter_cmd;
+ u8 pid_ctrl_index = state->pid_ctrl_index;
+
+ state->pid_ctrl_index = -2;
+ for (index_pid_filter_cmd = 0;
+ index_pid_filter_cmd <= pid_ctrl_index;
+ index_pid_filter_cmd++) {
+ if (state->pid_ctrl[index_pid_filter_cmd].cmd == DIB9000_PID_FILTER_CTRL)
+ dib9000_fw_pid_filter_ctrl(state->fe[0],
+ state->pid_ctrl[index_pid_filter_cmd].onoff);
+ else if (state->pid_ctrl[index_pid_filter_cmd].cmd == DIB9000_PID_FILTER)
+ dib9000_fw_pid_filter(state->fe[0],
+ state->pid_ctrl[index_pid_filter_cmd].id,
+ state->pid_ctrl[index_pid_filter_cmd].pid,
+ state->pid_ctrl[index_pid_filter_cmd].onoff);
+ }
+ }
+ /* do not postpone any more the pid filtering */
+ state->pid_ctrl_index = -2;
+
return 0;
}
@@ -2041,6 +2136,7 @@ static int dib9000_read_status(struct dvb_frontend *fe, fe_status_t * stat)
u8 index_frontend;
u16 lock = 0, lock_slave = 0;
+ DibAcquireLock(&state->demod_lock);
for (index_frontend = 1; (index_frontend < MAX_NUMBER_OF_FRONTENDS) && (state->fe[index_frontend] != NULL); index_frontend++)
lock_slave |= dib9000_read_lock(state->fe[index_frontend]);
@@ -2059,6 +2155,8 @@ static int dib9000_read_status(struct dvb_frontend *fe, fe_status_t * stat)
if ((lock & 0x0008) || (lock_slave & 0x0008))
*stat |= FE_HAS_LOCK;
+ DibReleaseLock(&state->demod_lock);
+
return 0;
}
@@ -2066,10 +2164,14 @@ static int dib9000_read_ber(struct dvb_frontend *fe, u32 * ber)
{
struct dib9000_state *state = fe->demodulator_priv;
u16 *c;
+ int ret = 0;
+ DibAcquireLock(&state->demod_lock);
DibAcquireLock(&state->platform.risc.mem_mbx_lock);
- if (dib9000_fw_memmbx_sync(state, FE_SYNC_CHANNEL) < 0)
- return -EIO;
+ if (dib9000_fw_memmbx_sync(state, FE_SYNC_CHANNEL) < 0) {
+ ret = -EIO;
+ goto error;
+ }
dib9000_risc_mem_read(state, FE_MM_R_FE_MONITOR,
state->i2c_read_buffer, 16 * 2);
DibReleaseLock(&state->platform.risc.mem_mbx_lock);
@@ -2077,7 +2179,10 @@ static int dib9000_read_ber(struct dvb_frontend *fe, u32 * ber)
c = (u16 *)state->i2c_read_buffer;
*ber = c[10] << 16 | c[11];
- return 0;
+
+error:
+ DibReleaseLock(&state->demod_lock);
+ return ret;
}
static int dib9000_read_signal_strength(struct dvb_frontend *fe, u16 * strength)
@@ -2086,7 +2191,9 @@ static int dib9000_read_signal_strength(struct dvb_frontend *fe, u16 * strength)
u8 index_frontend;
u16 *c = (u16 *)state->i2c_read_buffer;
u16 val;
+ int ret = 0;
+ DibAcquireLock(&state->demod_lock);
*strength = 0;
for (index_frontend = 1; (index_frontend < MAX_NUMBER_OF_FRONTENDS) && (state->fe[index_frontend] != NULL); index_frontend++) {
state->fe[index_frontend]->ops.read_signal_strength(state->fe[index_frontend], &val);
@@ -2097,8 +2204,10 @@ static int dib9000_read_signal_strength(struct dvb_frontend *fe, u16 * strength)
}
DibAcquireLock(&state->platform.risc.mem_mbx_lock);
- if (dib9000_fw_memmbx_sync(state, FE_SYNC_CHANNEL) < 0)
- return -EIO;
+ if (dib9000_fw_memmbx_sync(state, FE_SYNC_CHANNEL) < 0) {
+ ret = -EIO;
+ goto error;
+ }
dib9000_risc_mem_read(state, FE_MM_R_FE_MONITOR, (u8 *) c, 16 * 2);
DibReleaseLock(&state->platform.risc.mem_mbx_lock);
@@ -2107,7 +2216,10 @@ static int dib9000_read_signal_strength(struct dvb_frontend *fe, u16 * strength)
*strength = 65535;
else
*strength += val;
- return 0;
+
+error:
+ DibReleaseLock(&state->demod_lock);
+ return ret;
}
static u32 dib9000_get_snr(struct dvb_frontend *fe)
@@ -2151,6 +2263,7 @@ static int dib9000_read_snr(struct dvb_frontend *fe, u16 * snr)
u8 index_frontend;
u32 snr_master;
+ DibAcquireLock(&state->demod_lock);
snr_master = dib9000_get_snr(fe);
for (index_frontend = 1; (index_frontend < MAX_NUMBER_OF_FRONTENDS) && (state->fe[index_frontend] != NULL); index_frontend++)
snr_master += dib9000_get_snr(state->fe[index_frontend]);
@@ -2161,6 +2274,8 @@ static int dib9000_read_snr(struct dvb_frontend *fe, u16 * snr)
} else
*snr = 0;
+ DibReleaseLock(&state->demod_lock);
+
return 0;
}
@@ -2168,15 +2283,22 @@ static int dib9000_read_unc_blocks(struct dvb_frontend *fe, u32 * unc)
{
struct dib9000_state *state = fe->demodulator_priv;
u16 *c = (u16 *)state->i2c_read_buffer;
+ int ret = 0;
+ DibAcquireLock(&state->demod_lock);
DibAcquireLock(&state->platform.risc.mem_mbx_lock);
- if (dib9000_fw_memmbx_sync(state, FE_SYNC_CHANNEL) < 0)
- return -EIO;
+ if (dib9000_fw_memmbx_sync(state, FE_SYNC_CHANNEL) < 0) {
+ ret = -EIO;
+ goto error;
+ }
dib9000_risc_mem_read(state, FE_MM_R_FE_MONITOR, (u8 *) c, 16 * 2);
DibReleaseLock(&state->platform.risc.mem_mbx_lock);
*unc = c[12];
- return 0;
+
+error:
+ DibReleaseLock(&state->demod_lock);
+ return ret;
}
int dib9000_i2c_enumeration(struct i2c_adapter *i2c, int no_of_demods, u8 default_addr, u8 first_addr)
@@ -2322,6 +2444,10 @@ struct dvb_frontend *dib9000_attach(struct i2c_adapter *i2c_adap, u8 i2c_addr, c
DibInitLock(&st->platform.risc.mbx_lock);
DibInitLock(&st->platform.risc.mem_lock);
DibInitLock(&st->platform.risc.mem_mbx_lock);
+ DibInitLock(&st->demod_lock);
+ st->get_frontend_internal = 0;
+
+ st->pid_ctrl_index = -2;
st->fe[0] = fe;
fe->demodulator_priv = st;
diff --git a/drivers/media/dvb/frontends/dibx000_common.c b/drivers/media/dvb/frontends/dibx000_common.c
index dc5d17a..774d507 100644
--- a/drivers/media/dvb/frontends/dibx000_common.c
+++ b/drivers/media/dvb/frontends/dibx000_common.c
@@ -1,4 +1,5 @@
#include <linux/i2c.h>
+#include <linux/mutex.h>
#include "dibx000_common.h"
@@ -10,6 +11,13 @@ MODULE_PARM_DESC(debug, "turn on debugging (default: 0)");
static int dibx000_write_word(struct dibx000_i2c_master *mst, u16 reg, u16 val)
{
+ int ret;
+
+ if (mutex_lock_interruptible(&mst->i2c_buffer_lock) < 0) {
+ dprintk("could not acquire lock");
+ return -EINVAL;
+ }
+
mst->i2c_write_buffer[0] = (reg >> 8) & 0xff;
mst->i2c_write_buffer[1] = reg & 0xff;
mst->i2c_write_buffer[2] = (val >> 8) & 0xff;
@@ -21,11 +29,21 @@ static int dibx000_write_word(struct dibx000_i2c_master *mst, u16 reg, u16 val)
mst->msg[0].buf = mst->i2c_write_buffer;
mst->msg[0].len = 4;
- return i2c_transfer(mst->i2c_adap, mst->msg, 1) != 1 ? -EREMOTEIO : 0;
+ ret = i2c_transfer(mst->i2c_adap, mst->msg, 1) != 1 ? -EREMOTEIO : 0;
+ mutex_unlock(&mst->i2c_buffer_lock);
+
+ return ret;
}
static u16 dibx000_read_word(struct dibx000_i2c_master *mst, u16 reg)
{
+ u16 ret;
+
+ if (mutex_lock_interruptible(&mst->i2c_buffer_lock) < 0) {
+ dprintk("could not acquire lock");
+ return 0;
+ }
+
mst->i2c_write_buffer[0] = reg >> 8;
mst->i2c_write_buffer[1] = reg & 0xff;
@@ -42,7 +60,10 @@ static u16 dibx000_read_word(struct dibx000_i2c_master *mst, u16 reg)
if (i2c_transfer(mst->i2c_adap, mst->msg, 2) != 2)
dprintk("i2c read error on %d", reg);
- return (mst->i2c_read_buffer[0] << 8) | mst->i2c_read_buffer[1];
+ ret = (mst->i2c_read_buffer[0] << 8) | mst->i2c_read_buffer[1];
+ mutex_unlock(&mst->i2c_buffer_lock);
+
+ return ret;
}
static int dibx000_is_i2c_done(struct dibx000_i2c_master *mst)
@@ -257,6 +278,7 @@ static int dibx000_i2c_gated_gpio67_xfer(struct i2c_adapter *i2c_adap,
struct i2c_msg msg[], int num)
{
struct dibx000_i2c_master *mst = i2c_get_adapdata(i2c_adap);
+ int ret;
if (num > 32) {
dprintk("%s: too much I2C message to be transmitted (%i).\
@@ -264,10 +286,15 @@ static int dibx000_i2c_gated_gpio67_xfer(struct i2c_adapter *i2c_adap,
return -ENOMEM;
}
- memset(mst->msg, 0, sizeof(struct i2c_msg) * (2 + num));
-
dibx000_i2c_select_interface(mst, DIBX000_I2C_INTERFACE_GPIO_6_7);
+ if (mutex_lock_interruptible(&mst->i2c_buffer_lock) < 0) {
+ dprintk("could not acquire lock");
+ return -EINVAL;
+ }
+
+ memset(mst->msg, 0, sizeof(struct i2c_msg) * (2 + num));
+
/* open the gate */
dibx000_i2c_gate_ctrl(mst, &mst->i2c_write_buffer[0], msg[0].addr, 1);
mst->msg[0].addr = mst->i2c_addr;
@@ -282,7 +309,11 @@ static int dibx000_i2c_gated_gpio67_xfer(struct i2c_adapter *i2c_adap,
mst->msg[num + 1].buf = &mst->i2c_write_buffer[4];
mst->msg[num + 1].len = 4;
- return i2c_transfer(mst->i2c_adap, mst->msg, 2 + num) == 2 + num ? num : -EIO;
+ ret = (i2c_transfer(mst->i2c_adap, mst->msg, 2 + num) == 2 + num ?
+ num : -EIO);
+
+ mutex_unlock(&mst->i2c_buffer_lock);
+ return ret;
}
static struct i2c_algorithm dibx000_i2c_gated_gpio67_algo = {
@@ -294,6 +325,7 @@ static int dibx000_i2c_gated_tuner_xfer(struct i2c_adapter *i2c_adap,
struct i2c_msg msg[], int num)
{
struct dibx000_i2c_master *mst = i2c_get_adapdata(i2c_adap);
+ int ret;
if (num > 32) {
dprintk("%s: too much I2C message to be transmitted (%i).\
@@ -301,10 +333,14 @@ static int dibx000_i2c_gated_tuner_xfer(struct i2c_adapter *i2c_adap,
return -ENOMEM;
}
- memset(mst->msg, 0, sizeof(struct i2c_msg) * (2 + num));
-
dibx000_i2c_select_interface(mst, DIBX000_I2C_INTERFACE_TUNER);
+ if (mutex_lock_interruptible(&mst->i2c_buffer_lock) < 0) {
+ dprintk("could not acquire lock");
+ return -EINVAL;
+ }
+ memset(mst->msg, 0, sizeof(struct i2c_msg) * (2 + num));
+
/* open the gate */
dibx000_i2c_gate_ctrl(mst, &mst->i2c_write_buffer[0], msg[0].addr, 1);
mst->msg[0].addr = mst->i2c_addr;
@@ -319,7 +355,10 @@ static int dibx000_i2c_gated_tuner_xfer(struct i2c_adapter *i2c_adap,
mst->msg[num + 1].buf = &mst->i2c_write_buffer[4];
mst->msg[num + 1].len = 4;
- return i2c_transfer(mst->i2c_adap, mst->msg, 2 + num) == 2 + num ? num : -EIO;
+ ret = (i2c_transfer(mst->i2c_adap, mst->msg, 2 + num) == 2 + num ?
+ num : -EIO);
+ mutex_unlock(&mst->i2c_buffer_lock);
+ return ret;
}
static struct i2c_algorithm dibx000_i2c_gated_tuner_algo = {
@@ -390,8 +429,18 @@ static int i2c_adapter_init(struct i2c_adapter *i2c_adap,
int dibx000_init_i2c_master(struct dibx000_i2c_master *mst, u16 device_rev,
struct i2c_adapter *i2c_adap, u8 i2c_addr)
{
- u8 tx[4];
- struct i2c_msg m = {.addr = i2c_addr >> 1,.buf = tx,.len = 4 };
+ int ret;
+
+ mutex_init(&mst->i2c_buffer_lock);
+ if (mutex_lock_interruptible(&mst->i2c_buffer_lock) < 0) {
+ dprintk("could not acquire lock");
+ return -EINVAL;
+ }
+ memset(mst->msg, 0, sizeof(struct i2c_msg));
+ mst->msg[0].addr = i2c_addr >> 1;
+ mst->msg[0].flags = 0;
+ mst->msg[0].buf = mst->i2c_write_buffer;
+ mst->msg[0].len = 4;
mst->device_rev = device_rev;
mst->i2c_adap = i2c_adap;
@@ -431,9 +480,12 @@ int dibx000_init_i2c_master(struct dibx000_i2c_master *mst, u16 device_rev,
"DiBX000: could not initialize the master i2c_adapter\n");
/* initialize the i2c-master by closing the gate */
- dibx000_i2c_gate_ctrl(mst, tx, 0, 0);
+ dibx000_i2c_gate_ctrl(mst, mst->i2c_write_buffer, 0, 0);
+
+ ret = (i2c_transfer(i2c_adap, mst->msg, 1) == 1);
+ mutex_unlock(&mst->i2c_buffer_lock);
- return i2c_transfer(i2c_adap, &m, 1) == 1;
+ return ret;
}
EXPORT_SYMBOL(dibx000_init_i2c_master);
diff --git a/drivers/media/dvb/frontends/dibx000_common.h b/drivers/media/dvb/frontends/dibx000_common.h
index f031165..5e01147 100644
--- a/drivers/media/dvb/frontends/dibx000_common.h
+++ b/drivers/media/dvb/frontends/dibx000_common.h
@@ -33,6 +33,7 @@ struct dibx000_i2c_master {
struct i2c_msg msg[34];
u8 i2c_write_buffer[8];
u8 i2c_read_buffer[2];
+ struct mutex i2c_buffer_lock;
};
extern int dibx000_init_i2c_master(struct dibx000_i2c_master *mst,
commit 45cbff13693d645fa5dcbba964e802e1746b2e57
Author: Olivier Grenie <olivier.grenie@dibcom.fr>
Date: Mon Aug 1 17:45:58 2011 +0200
[media] dib0700: protect the dib0700 buffer access
This patch protects the common buffer access inside the dib0700 in order
to manage concurrent access. This protection is done using mutex.
Cc: Mauro Carvalho Chehab <mchehab@redhat.com>
Cc: Florian Mickler <florian@mickler.org>
Cc: stable@kernel.org
Signed-off-by: Javier Marcet <javier@marcet.info>
Signed-off-by: Olivier Grenie <olivier.grenie@dibcom.fr>
Signed-off-by: Patrick Boettcher <patrick.boettcher@dibcom.fr>
diff --git a/drivers/media/dvb/dvb-usb/dib0700_core.c b/drivers/media/dvb/dvb-usb/dib0700_core.c
index 5eb91b4..291b645 100644
--- a/drivers/media/dvb/dvb-usb/dib0700_core.c
+++ b/drivers/media/dvb/dvb-usb/dib0700_core.c
@@ -30,6 +30,11 @@ int dib0700_get_version(struct dvb_usb_device *d, u32 *hwversion,
struct dib0700_state *st = d->priv;
int ret;
+ if (mutex_lock_interruptible(&d->usb_mutex) < 0) {
+ dprintk("could not acquire lock");
+ return 0;
+ }
+
ret = usb_control_msg(d->udev, usb_rcvctrlpipe(d->udev, 0),
REQUEST_GET_VERSION,
USB_TYPE_VENDOR | USB_DIR_IN, 0, 0,
@@ -46,6 +51,7 @@ int dib0700_get_version(struct dvb_usb_device *d, u32 *hwversion,
if (fwtype != NULL)
*fwtype = (st->buf[12] << 24) | (st->buf[13] << 16) |
(st->buf[14] << 8) | st->buf[15];
+ mutex_unlock(&d->usb_mutex);
return ret;
}
@@ -108,7 +114,12 @@ int dib0700_ctrl_rd(struct dvb_usb_device *d, u8 *tx, u8 txlen, u8 *rx, u8 rxlen
int dib0700_set_gpio(struct dvb_usb_device *d, enum dib07x0_gpios gpio, u8 gpio_dir, u8 gpio_val)
{
struct dib0700_state *st = d->priv;
- s16 ret;
+ int ret;
+
+ if (mutex_lock_interruptible(&d->usb_mutex) < 0) {
+ dprintk("could not acquire lock");
+ return 0;
+ }
st->buf[0] = REQUEST_SET_GPIO;
st->buf[1] = gpio;
@@ -116,6 +127,7 @@ int dib0700_set_gpio(struct dvb_usb_device *d, enum dib07x0_gpios gpio, u8 gpio_
ret = dib0700_ctrl_wr(d, st->buf, 3);
+ mutex_unlock(&d->usb_mutex);
return ret;
}
@@ -125,6 +137,11 @@ static int dib0700_set_usb_xfer_len(struct dvb_usb_device *d, u16 nb_ts_packets)
int ret;
if (st->fw_version >= 0x10201) {
+ if (mutex_lock_interruptible(&d->usb_mutex) < 0) {
+ dprintk("could not acquire lock");
+ return 0;
+ }
+
st->buf[0] = REQUEST_SET_USB_XFER_LEN;
st->buf[1] = (nb_ts_packets >> 8) & 0xff;
st->buf[2] = nb_ts_packets & 0xff;
@@ -132,6 +149,7 @@ static int dib0700_set_usb_xfer_len(struct dvb_usb_device *d, u16 nb_ts_packets)
deb_info("set the USB xfer len to %i Ts packet\n", nb_ts_packets);
ret = dib0700_ctrl_wr(d, st->buf, 3);
+ mutex_unlock(&d->usb_mutex);
} else {
deb_info("this firmware does not allow to change the USB xfer len\n");
ret = -EIO;
@@ -208,6 +226,10 @@ static int dib0700_i2c_xfer_new(struct i2c_adapter *adap, struct i2c_msg *msg,
} else {
/* Write request */
+ if (mutex_lock_interruptible(&d->usb_mutex) < 0) {
+ dprintk("could not acquire lock");
+ return 0;
+ }
st->buf[0] = REQUEST_NEW_I2C_WRITE;
st->buf[1] = msg[i].addr << 1;
st->buf[2] = (en_start << 7) | (en_stop << 6) |
@@ -227,6 +249,7 @@ static int dib0700_i2c_xfer_new(struct i2c_adapter *adap, struct i2c_msg *msg,
USB_TYPE_VENDOR | USB_DIR_OUT,
0, 0, st->buf, msg[i].len + 4,
USB_CTRL_GET_TIMEOUT);
+ mutex_unlock(&d->usb_mutex);
if (result < 0) {
deb_info("i2c write error (status = %d)\n", result);
break;
@@ -249,6 +272,10 @@ static int dib0700_i2c_xfer_legacy(struct i2c_adapter *adap,
if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
return -EAGAIN;
+ if (mutex_lock_interruptible(&d->usb_mutex) < 0) {
+ dprintk("could not acquire lock");
+ return 0;
+ }
for (i = 0; i < num; i++) {
/* fill in the address */
@@ -279,6 +306,7 @@ static int dib0700_i2c_xfer_legacy(struct i2c_adapter *adap,
break;
}
}
+ mutex_unlock(&d->usb_mutex);
mutex_unlock(&d->i2c_mutex);
return i;
@@ -337,7 +365,12 @@ static int dib0700_set_clock(struct dvb_usb_device *d, u8 en_pll,
u16 pll_loopdiv, u16 free_div, u16 dsuScaler)
{
struct dib0700_state *st = d->priv;
- s16 ret;
+ int ret;
+
+ if (mutex_lock_interruptible(&d->usb_mutex) < 0) {
+ dprintk("could not acquire lock");
+ return 0;
+ }
st->buf[0] = REQUEST_SET_CLOCK;
st->buf[1] = (en_pll << 7) | (pll_src << 6) |
@@ -352,6 +385,7 @@ static int dib0700_set_clock(struct dvb_usb_device *d, u8 en_pll,
st->buf[9] = dsuScaler & 0xff; /* LSB */
ret = dib0700_ctrl_wr(d, st->buf, 10);
+ mutex_unlock(&d->usb_mutex);
return ret;
}
@@ -360,10 +394,16 @@ int dib0700_set_i2c_speed(struct dvb_usb_device *d, u16 scl_kHz)
{
struct dib0700_state *st = d->priv;
u16 divider;
+ int ret;
if (scl_kHz == 0)
return -EINVAL;
+ if (mutex_lock_interruptible(&d->usb_mutex) < 0) {
+ dprintk("could not acquire lock");
+ return 0;
+ }
+
st->buf[0] = REQUEST_SET_I2C_PARAM;
divider = (u16) (30000 / scl_kHz);
st->buf[1] = 0;
@@ -379,7 +419,11 @@ int dib0700_set_i2c_speed(struct dvb_usb_device *d, u16 scl_kHz)
deb_info("setting I2C speed: %04x %04x %04x (%d kHz).",
(st->buf[2] << 8) | (st->buf[3]), (st->buf[4] << 8) |
st->buf[5], (st->buf[6] << 8) | st->buf[7], scl_kHz);
- return dib0700_ctrl_wr(d, st->buf, 8);
+
+ ret = dib0700_ctrl_wr(d, st->buf, 8);
+ mutex_unlock(&d->usb_mutex);
+
+ return ret;
}
@@ -515,6 +559,11 @@ int dib0700_streaming_ctrl(struct dvb_usb_adapter *adap, int onoff)
}
}
+ if (mutex_lock_interruptible(&adap->dev->usb_mutex) < 0) {
+ dprintk("could not acquire lock");
+ return 0;
+ }
+
st->buf[0] = REQUEST_ENABLE_VIDEO;
/* this bit gives a kind of command,
* rather than enabling something or not */
@@ -548,7 +597,10 @@ int dib0700_streaming_ctrl(struct dvb_usb_adapter *adap, int onoff)
deb_info("data for streaming: %x %x\n", st->buf[1], st->buf[2]);
- return dib0700_ctrl_wr(adap->dev, st->buf, 4);
+ ret = dib0700_ctrl_wr(adap->dev, st->buf, 4);
+ mutex_unlock(&adap->dev->usb_mutex);
+
+ return ret;
}
int dib0700_change_protocol(struct rc_dev *rc, u64 rc_type)
@@ -557,6 +609,11 @@ int dib0700_change_protocol(struct rc_dev *rc, u64 rc_type)
struct dib0700_state *st = d->priv;
int new_proto, ret;
+ if (mutex_lock_interruptible(&d->usb_mutex) < 0) {
+ dprintk("could not acquire lock");
+ return 0;
+ }
+
st->buf[0] = REQUEST_SET_RC;
st->buf[1] = 0;
st->buf[2] = 0;
@@ -567,23 +624,29 @@ int dib0700_change_protocol(struct rc_dev *rc, u64 rc_type)
else if (rc_type == RC_TYPE_NEC)
new_proto = 0;
else if (rc_type == RC_TYPE_RC6) {
- if (st->fw_version < 0x10200)
- return -EINVAL;
+ if (st->fw_version < 0x10200) {
+ ret = -EINVAL;
+ goto out;
+ }
new_proto = 2;
- } else
- return -EINVAL;
+ } else {
+ ret = -EINVAL;
+ goto out;
+ }
st->buf[1] = new_proto;
ret = dib0700_ctrl_wr(d, st->buf, 3);
if (ret < 0) {
err("ir protocol setup failed");
- return ret;
+ goto out;
}
d->props.rc.core.protocol = rc_type;
+out:
+ mutex_unlock(&d->usb_mutex);
return ret;
}
commit aeb2d456b746164a4bd19e53de0a6678ca63fcad
Author: Olivier Grenie <olivier.grenie@dibcom.fr>
Date: Thu Aug 4 18:10:03 2011 +0200
[media] dib0700: correct error message
The goal of this patch is to correct a previous patch. In case of error,
the err() function should be used instead of dprintk() function.
Signed-off-by: Olivier Grenie <olivier.grenie@dibcom.fr>
diff --git a/drivers/media/dvb/dvb-usb/dib0700_core.c b/drivers/media/dvb/dvb-usb/dib0700_core.c
index 291b645..b693ed1 100644
--- a/drivers/media/dvb/dvb-usb/dib0700_core.c
+++ b/drivers/media/dvb/dvb-usb/dib0700_core.c
@@ -31,7 +31,7 @@ int dib0700_get_version(struct dvb_usb_device *d, u32 *hwversion,
int ret;
if (mutex_lock_interruptible(&d->usb_mutex) < 0) {
- dprintk("could not acquire lock");
+ err("could not acquire lock");
return 0;
}
@@ -117,7 +117,7 @@ int dib0700_set_gpio(struct dvb_usb_device *d, enum dib07x0_gpios gpio, u8 gpio_
int ret;
if (mutex_lock_interruptible(&d->usb_mutex) < 0) {
- dprintk("could not acquire lock");
+ err("could not acquire lock");
return 0;
}
@@ -138,7 +138,7 @@ static int dib0700_set_usb_xfer_len(struct dvb_usb_device *d, u16 nb_ts_packets)
if (st->fw_version >= 0x10201) {
if (mutex_lock_interruptible(&d->usb_mutex) < 0) {
- dprintk("could not acquire lock");
+ err("could not acquire lock");
return 0;
}
@@ -227,7 +227,7 @@ static int dib0700_i2c_xfer_new(struct i2c_adapter *adap, struct i2c_msg *msg,
} else {
/* Write request */
if (mutex_lock_interruptible(&d->usb_mutex) < 0) {
- dprintk("could not acquire lock");
+ err("could not acquire lock");
return 0;
}
st->buf[0] = REQUEST_NEW_I2C_WRITE;
@@ -273,7 +273,7 @@ static int dib0700_i2c_xfer_legacy(struct i2c_adapter *adap,
if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
return -EAGAIN;
if (mutex_lock_interruptible(&d->usb_mutex) < 0) {
- dprintk("could not acquire lock");
+ err("could not acquire lock");
return 0;
}
@@ -368,7 +368,7 @@ static int dib0700_set_clock(struct dvb_usb_device *d, u8 en_pll,
int ret;
if (mutex_lock_interruptible(&d->usb_mutex) < 0) {
- dprintk("could not acquire lock");
+ err("could not acquire lock");
return 0;
}
@@ -400,7 +400,7 @@ int dib0700_set_i2c_speed(struct dvb_usb_device *d, u16 scl_kHz)
return -EINVAL;
if (mutex_lock_interruptible(&d->usb_mutex) < 0) {
- dprintk("could not acquire lock");
+ err("could not acquire lock");
return 0;
}
@@ -560,7 +560,7 @@ int dib0700_streaming_ctrl(struct dvb_usb_adapter *adap, int onoff)
}
if (mutex_lock_interruptible(&adap->dev->usb_mutex) < 0) {
- dprintk("could not acquire lock");
+ err("could not acquire lock");
return 0;
}
@@ -610,7 +610,7 @@ int dib0700_change_protocol(struct rc_dev *rc, u64 rc_type)
int new_proto, ret;
if (mutex_lock_interruptible(&d->usb_mutex) < 0) {
- dprintk("could not acquire lock");
+ err("could not acquire lock");
return 0;
}