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[PATCH] i2c: Semaphore to mutex conversions, part 2

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semaphore to mutex conversion.

the conversion was generated via scripts, and the result was validated
automatically via a script as well.

build tested.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Ingo Molnar 2006-01-18 23:16:04 +01:00 committed by Greg Kroah-Hartman
parent 7656032b90
commit 5c085d369c
8 changed files with 68 additions and 64 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
drivers/i2c/busses/i2c-amd756-s4882.c
View File

@ -38,6 +38,7 @@
#include <linux/slab.h> #include <linux/slab.h>
#include <linux/init.h> #include <linux/init.h>
#include <linux/i2c.h> #include <linux/i2c.h>
#include <linux/mutex.h>
extern struct i2c_adapter amd756_smbus; extern struct i2c_adapter amd756_smbus;
@ -45,7 +46,7 @@ static struct i2c_adapter *s4882_adapter;
static struct i2c_algorithm *s4882_algo; static struct i2c_algorithm *s4882_algo;
/* Wrapper access functions for multiplexed SMBus */ /* Wrapper access functions for multiplexed SMBus */
static struct semaphore amd756_lock; static struct mutex amd756_lock;
static s32 amd756_access_virt0(struct i2c_adapter * adap, u16 addr, static s32 amd756_access_virt0(struct i2c_adapter * adap, u16 addr,
unsigned short flags, char read_write, unsigned short flags, char read_write,
@ -59,12 +60,12 @@ static s32 amd756_access_virt0(struct i2c_adapter * adap, u16 addr,
|| addr == 0x18) || addr == 0x18)
return -1; return -1;
down(&amd756_lock); mutex_lock(&amd756_lock);
error = amd756_smbus.algo->smbus_xfer(adap, addr, flags, read_write, error = amd756_smbus.algo->smbus_xfer(adap, addr, flags, read_write,
command, size, data); command, size, data);
up(&amd756_lock); mutex_unlock(&amd756_lock);
return error; return error;
} }
@ -87,7 +88,7 @@ static inline s32 amd756_access_channel(struct i2c_adapter * adap, u16 addr,
if (addr != 0x4c && (addr & 0xfc) != 0x50 && (addr & 0xfc) != 0x30) if (addr != 0x4c && (addr & 0xfc) != 0x50 && (addr & 0xfc) != 0x30)
return -1; return -1;
down(&amd756_lock); mutex_lock(&amd756_lock);
if (last_channels != channels) { if (last_channels != channels) {
union i2c_smbus_data mplxdata; union i2c_smbus_data mplxdata;
@ -105,7 +106,7 @@ static inline s32 amd756_access_channel(struct i2c_adapter * adap, u16 addr,
command, size, data); command, size, data);
UNLOCK: UNLOCK:
up(&amd756_lock); mutex_unlock(&amd756_lock);
return error; return error;
} }
@ -166,7 +167,7 @@ static int __init amd756_s4882_init(void)
} }
printk(KERN_INFO "Enabling SMBus multiplexing for Tyan S4882\n"); printk(KERN_INFO "Enabling SMBus multiplexing for Tyan S4882\n");
init_MUTEX(&amd756_lock); mutex_init(&amd756_lock);
/* Define the 5 virtual adapters and algorithms structures */ /* Define the 5 virtual adapters and algorithms structures */
if (!(s4882_adapter = kzalloc(5 * sizeof(struct i2c_adapter), if (!(s4882_adapter = kzalloc(5 * sizeof(struct i2c_adapter),

2
drivers/i2c/busses/i2c-isa.c
View File

@ -125,7 +125,7 @@ int i2c_isa_del_driver(struct i2c_driver *driver)
static int __init i2c_isa_init(void) static int __init i2c_isa_init(void)
{ {
init_MUTEX(&isa_adapter.clist_lock); mutex_init(&isa_adapter.clist_lock);
INIT_LIST_HEAD(&isa_adapter.clients); INIT_LIST_HEAD(&isa_adapter.clients);
isa_adapter.nr = ANY_I2C_ISA_BUS; isa_adapter.nr = ANY_I2C_ISA_BUS;

9
drivers/i2c/chips/eeprom.c
View File

@ -33,6 +33,7 @@
#include <linux/sched.h> #include <linux/sched.h>
#include <linux/jiffies.h> #include <linux/jiffies.h>
#include <linux/i2c.h> #include <linux/i2c.h>
#include <linux/mutex.h>
/* Addresses to scan */ /* Addresses to scan */
static unsigned short normal_i2c[] = { 0x50, 0x51, 0x52, 0x53, 0x54, static unsigned short normal_i2c[] = { 0x50, 0x51, 0x52, 0x53, 0x54,
@ -54,7 +55,7 @@ enum eeprom_nature {
/* Each client has this additional data */ /* Each client has this additional data */
struct eeprom_data { struct eeprom_data {
struct i2c_client client; struct i2c_client client;
struct semaphore update_lock; struct mutex update_lock;
u8 valid; /* bitfield, bit!=0 if slice is valid */ u8 valid; /* bitfield, bit!=0 if slice is valid */
unsigned long last_updated[8]; /* In jiffies, 8 slices */ unsigned long last_updated[8]; /* In jiffies, 8 slices */
u8 data[EEPROM_SIZE]; /* Register values */ u8 data[EEPROM_SIZE]; /* Register values */
@ -81,7 +82,7 @@ static void eeprom_update_client(struct i2c_client *client, u8 slice)
struct eeprom_data *data = i2c_get_clientdata(client); struct eeprom_data *data = i2c_get_clientdata(client);
int i, j; int i, j;
down(&data->update_lock); mutex_lock(&data->update_lock);
if (!(data->valid & (1 << slice)) || if (!(data->valid & (1 << slice)) ||
time_after(jiffies, data->last_updated[slice] + 300 * HZ)) { time_after(jiffies, data->last_updated[slice] + 300 * HZ)) {
@ -107,7 +108,7 @@ static void eeprom_update_client(struct i2c_client *client, u8 slice)
data->valid |= (1 << slice); data->valid |= (1 << slice);
} }
exit: exit:
up(&data->update_lock); mutex_unlock(&data->update_lock);
} }
static ssize_t eeprom_read(struct kobject *kobj, char *buf, loff_t off, size_t count) static ssize_t eeprom_read(struct kobject *kobj, char *buf, loff_t off, size_t count)
@ -187,7 +188,7 @@ static int eeprom_detect(struct i2c_adapter *adapter, int address, int kind)
/* Fill in the remaining client fields */ /* Fill in the remaining client fields */
strlcpy(new_client->name, "eeprom", I2C_NAME_SIZE); strlcpy(new_client->name, "eeprom", I2C_NAME_SIZE);
data->valid = 0; data->valid = 0;
init_MUTEX(&data->update_lock); mutex_init(&data->update_lock);
data->nature = UNKNOWN; data->nature = UNKNOWN;
/* Tell the I2C layer a new client has arrived */ /* Tell the I2C layer a new client has arrived */

10
drivers/i2c/chips/max6875.c
View File

@ -31,7 +31,7 @@
#include <linux/module.h> #include <linux/module.h>
#include <linux/slab.h> #include <linux/slab.h>
#include <linux/i2c.h> #include <linux/i2c.h>
#include <asm/semaphore.h> #include <linux/mutex.h>
/* Do not scan - the MAX6875 access method will write to some EEPROM chips */ /* Do not scan - the MAX6875 access method will write to some EEPROM chips */
static unsigned short normal_i2c[] = {I2C_CLIENT_END}; static unsigned short normal_i2c[] = {I2C_CLIENT_END};
@ -54,7 +54,7 @@ I2C_CLIENT_INSMOD_1(max6875);
/* Each client has this additional data */ /* Each client has this additional data */
struct max6875_data { struct max6875_data {
struct i2c_client client; struct i2c_client client;
struct semaphore update_lock; struct mutex update_lock;
u32 valid; u32 valid;
u8 data[USER_EEPROM_SIZE]; u8 data[USER_EEPROM_SIZE];
@ -83,7 +83,7 @@ static void max6875_update_slice(struct i2c_client *client, int slice)
if (slice >= USER_EEPROM_SLICES) if (slice >= USER_EEPROM_SLICES)
return; return;
down(&data->update_lock); mutex_lock(&data->update_lock);
buf = &data->data[slice << SLICE_BITS]; buf = &data->data[slice << SLICE_BITS];
@ -122,7 +122,7 @@ static void max6875_update_slice(struct i2c_client *client, int slice)
data->valid |= (1 << slice); data->valid |= (1 << slice);
} }
exit_up: exit_up:
up(&data->update_lock); mutex_unlock(&data->update_lock);
} }
static ssize_t max6875_read(struct kobject *kobj, char *buf, loff_t off, static ssize_t max6875_read(struct kobject *kobj, char *buf, loff_t off,
@ -196,7 +196,7 @@ static int max6875_detect(struct i2c_adapter *adapter, int address, int kind)
real_client->driver = &max6875_driver; real_client->driver = &max6875_driver;
real_client->flags = 0; real_client->flags = 0;
strlcpy(real_client->name, "max6875", I2C_NAME_SIZE); strlcpy(real_client->name, "max6875", I2C_NAME_SIZE);
init_MUTEX(&data->update_lock); mutex_init(&data->update_lock);
/* Init fake client data */ /* Init fake client data */
/* set the client data to the i2c_client so that it will get freed */ /* set the client data to the i2c_client so that it will get freed */

13
drivers/i2c/chips/pcf8591.c
View File

@ -24,6 +24,7 @@
#include <linux/init.h> #include <linux/init.h>
#include <linux/slab.h> #include <linux/slab.h>
#include <linux/i2c.h> #include <linux/i2c.h>
#include <linux/mutex.h>
/* Addresses to scan */ /* Addresses to scan */
static unsigned short normal_i2c[] = { 0x48, 0x49, 0x4a, 0x4b, 0x4c, static unsigned short normal_i2c[] = { 0x48, 0x49, 0x4a, 0x4b, 0x4c,
@ -74,7 +75,7 @@ MODULE_PARM_DESC(input_mode,
struct pcf8591_data { struct pcf8591_data {
struct i2c_client client; struct i2c_client client;
struct semaphore update_lock; struct mutex update_lock;
u8 control; u8 control;
u8 aout; u8 aout;
@ -144,13 +145,13 @@ static ssize_t set_out0_enable(struct device *dev, struct device_attribute *attr
struct pcf8591_data *data = i2c_get_clientdata(client); struct pcf8591_data *data = i2c_get_clientdata(client);
unsigned long val = simple_strtoul(buf, NULL, 10); unsigned long val = simple_strtoul(buf, NULL, 10);
down(&data->update_lock); mutex_lock(&data->update_lock);
if (val) if (val)
data->control |= PCF8591_CONTROL_AOEF; data->control |= PCF8591_CONTROL_AOEF;
else else
data->control &= ~PCF8591_CONTROL_AOEF; data->control &= ~PCF8591_CONTROL_AOEF;
i2c_smbus_write_byte(client, data->control); i2c_smbus_write_byte(client, data->control);
up(&data->update_lock); mutex_unlock(&data->update_lock);
return count; return count;
} }
@ -200,7 +201,7 @@ static int pcf8591_detect(struct i2c_adapter *adapter, int address, int kind)
/* Fill in the remaining client fields and put it into the global /* Fill in the remaining client fields and put it into the global
list */ list */
strlcpy(new_client->name, "pcf8591", I2C_NAME_SIZE); strlcpy(new_client->name, "pcf8591", I2C_NAME_SIZE);
init_MUTEX(&data->update_lock); mutex_init(&data->update_lock);
/* Tell the I2C layer a new client has arrived */ /* Tell the I2C layer a new client has arrived */
if ((err = i2c_attach_client(new_client))) if ((err = i2c_attach_client(new_client)))
@ -265,7 +266,7 @@ static int pcf8591_read_channel(struct device *dev, int channel)
struct i2c_client *client = to_i2c_client(dev); struct i2c_client *client = to_i2c_client(dev);
struct pcf8591_data *data = i2c_get_clientdata(client); struct pcf8591_data *data = i2c_get_clientdata(client);
down(&data->update_lock); mutex_lock(&data->update_lock);
if ((data->control & PCF8591_CONTROL_AICH_MASK) != channel) { if ((data->control & PCF8591_CONTROL_AICH_MASK) != channel) {
data->control = (data->control & ~PCF8591_CONTROL_AICH_MASK) data->control = (data->control & ~PCF8591_CONTROL_AICH_MASK)
@ -278,7 +279,7 @@ static int pcf8591_read_channel(struct device *dev, int channel)
} }
value = i2c_smbus_read_byte(client); value = i2c_smbus_read_byte(client);
up(&data->update_lock); mutex_unlock(&data->update_lock);
if ((channel == 2 && input_mode == 2) || if ((channel == 2 && input_mode == 2) ||
(channel != 3 && (input_mode == 1 || input_mode == 3))) (channel != 3 && (input_mode == 1 || input_mode == 3)))

45
drivers/i2c/chips/tps65010.c
View File

@ -32,6 +32,7 @@
#include <linux/suspend.h> #include <linux/suspend.h>
#include <linux/debugfs.h> #include <linux/debugfs.h>
#include <linux/seq_file.h> #include <linux/seq_file.h>
#include <linux/mutex.h>
#include <asm/irq.h> #include <asm/irq.h>
#include <asm/mach-types.h> #include <asm/mach-types.h>
@ -81,7 +82,7 @@ enum tps_model {
struct tps65010 { struct tps65010 {
struct i2c_client client; struct i2c_client client;
struct semaphore lock; struct mutex lock;
int irq; int irq;
struct work_struct work; struct work_struct work;
struct dentry *file; struct dentry *file;
@ -218,7 +219,7 @@ static int dbg_show(struct seq_file *s, void *_)
seq_printf(s, "driver %s\nversion %s\nchip %s\n\n", seq_printf(s, "driver %s\nversion %s\nchip %s\n\n",
DRIVER_NAME, DRIVER_VERSION, chip); DRIVER_NAME, DRIVER_VERSION, chip);
down(&tps->lock); mutex_lock(&tps->lock);
/* FIXME how can we tell whether a battery is present? /* FIXME how can we tell whether a battery is present?
* likely involves a charge gauging chip (like BQ26501). * likely involves a charge gauging chip (like BQ26501).
@ -300,7 +301,7 @@ static int dbg_show(struct seq_file *s, void *_)
(v2 & (1 << (4 + i))) ? "rising" : "falling"); (v2 & (1 << (4 + i))) ? "rising" : "falling");
} }
up(&tps->lock); mutex_unlock(&tps->lock);
return 0; return 0;
} }
@ -416,7 +417,7 @@ static void tps65010_work(void *_tps)
{ {
struct tps65010 *tps = _tps; struct tps65010 *tps = _tps;
down(&tps->lock); mutex_lock(&tps->lock);
tps65010_interrupt(tps); tps65010_interrupt(tps);
@ -444,7 +445,7 @@ static void tps65010_work(void *_tps)
if (test_and_clear_bit(FLAG_IRQ_ENABLE, &tps->flags)) if (test_and_clear_bit(FLAG_IRQ_ENABLE, &tps->flags))
enable_irq(tps->irq); enable_irq(tps->irq);
up(&tps->lock); mutex_unlock(&tps->lock);
} }
static irqreturn_t tps65010_irq(int irq, void *_tps, struct pt_regs *regs) static irqreturn_t tps65010_irq(int irq, void *_tps, struct pt_regs *regs)
@ -505,7 +506,7 @@ tps65010_probe(struct i2c_adapter *bus, int address, int kind)
if (!tps) if (!tps)
return 0; return 0;
init_MUTEX(&tps->lock); mutex_init(&tps->lock);
INIT_WORK(&tps->work, tps65010_work, tps); INIT_WORK(&tps->work, tps65010_work, tps);
tps->irq = -1; tps->irq = -1;
tps->client.addr = address; tps->client.addr = address;
@ -695,7 +696,7 @@ int tps65010_set_gpio_out_value(unsigned gpio, unsigned value)
if ((gpio < GPIO1) || (gpio > GPIO4)) if ((gpio < GPIO1) || (gpio > GPIO4))
return -EINVAL; return -EINVAL;
down(&the_tps->lock); mutex_lock(&the_tps->lock);
defgpio = i2c_smbus_read_byte_data(&the_tps->client, TPS_DEFGPIO); defgpio = i2c_smbus_read_byte_data(&the_tps->client, TPS_DEFGPIO);
@ -720,7 +721,7 @@ int tps65010_set_gpio_out_value(unsigned gpio, unsigned value)
gpio, value ? "high" : "low", gpio, value ? "high" : "low",
i2c_smbus_read_byte_data(&the_tps->client, TPS_DEFGPIO)); i2c_smbus_read_byte_data(&the_tps->client, TPS_DEFGPIO));
up(&the_tps->lock); mutex_unlock(&the_tps->lock);
return status; return status;
} }
EXPORT_SYMBOL(tps65010_set_gpio_out_value); EXPORT_SYMBOL(tps65010_set_gpio_out_value);
@ -745,7 +746,7 @@ int tps65010_set_led(unsigned led, unsigned mode)
led = LED2; led = LED2;
} }
down(&the_tps->lock); mutex_lock(&the_tps->lock);
pr_debug("%s: led%i_on 0x%02x\n", DRIVER_NAME, led, pr_debug("%s: led%i_on 0x%02x\n", DRIVER_NAME, led,
i2c_smbus_read_byte_data(&the_tps->client, i2c_smbus_read_byte_data(&the_tps->client,
@ -771,7 +772,7 @@ int tps65010_set_led(unsigned led, unsigned mode)
default: default:
printk(KERN_ERR "%s: Wrong mode parameter for set_led()\n", printk(KERN_ERR "%s: Wrong mode parameter for set_led()\n",
DRIVER_NAME); DRIVER_NAME);
up(&the_tps->lock); mutex_unlock(&the_tps->lock);
return -EINVAL; return -EINVAL;
} }
@ -781,7 +782,7 @@ int tps65010_set_led(unsigned led, unsigned mode)
if (status != 0) { if (status != 0) {
printk(KERN_ERR "%s: Failed to write led%i_on register\n", printk(KERN_ERR "%s: Failed to write led%i_on register\n",
DRIVER_NAME, led); DRIVER_NAME, led);
up(&the_tps->lock); mutex_unlock(&the_tps->lock);
return status; return status;
} }
@ -794,7 +795,7 @@ int tps65010_set_led(unsigned led, unsigned mode)
if (status != 0) { if (status != 0) {
printk(KERN_ERR "%s: Failed to write led%i_per register\n", printk(KERN_ERR "%s: Failed to write led%i_per register\n",
DRIVER_NAME, led); DRIVER_NAME, led);
up(&the_tps->lock); mutex_unlock(&the_tps->lock);
return status; return status;
} }
@ -802,7 +803,7 @@ int tps65010_set_led(unsigned led, unsigned mode)
i2c_smbus_read_byte_data(&the_tps->client, i2c_smbus_read_byte_data(&the_tps->client,
TPS_LED1_PER + offs)); TPS_LED1_PER + offs));
up(&the_tps->lock); mutex_unlock(&the_tps->lock);
return status; return status;
} }
@ -820,7 +821,7 @@ int tps65010_set_vib(unsigned value)
if (!the_tps) if (!the_tps)
return -ENODEV; return -ENODEV;
down(&the_tps->lock); mutex_lock(&the_tps->lock);
vdcdc2 = i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC2); vdcdc2 = i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC2);
vdcdc2 &= ~(1 << 1); vdcdc2 &= ~(1 << 1);
@ -831,7 +832,7 @@ int tps65010_set_vib(unsigned value)
pr_debug("%s: vibrator %s\n", DRIVER_NAME, value ? "on" : "off"); pr_debug("%s: vibrator %s\n", DRIVER_NAME, value ? "on" : "off");
up(&the_tps->lock); mutex_unlock(&the_tps->lock);
return status; return status;
} }
EXPORT_SYMBOL(tps65010_set_vib); EXPORT_SYMBOL(tps65010_set_vib);
@ -848,7 +849,7 @@ int tps65010_set_low_pwr(unsigned mode)
if (!the_tps) if (!the_tps)
return -ENODEV; return -ENODEV;
down(&the_tps->lock); mutex_lock(&the_tps->lock);
pr_debug("%s: %s low_pwr, vdcdc1 0x%02x\n", DRIVER_NAME, pr_debug("%s: %s low_pwr, vdcdc1 0x%02x\n", DRIVER_NAME,
mode ? "enable" : "disable", mode ? "enable" : "disable",
@ -876,7 +877,7 @@ int tps65010_set_low_pwr(unsigned mode)
pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME, pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME,
i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC1)); i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC1));
up(&the_tps->lock); mutex_unlock(&the_tps->lock);
return status; return status;
} }
@ -894,7 +895,7 @@ int tps65010_config_vregs1(unsigned value)
if (!the_tps) if (!the_tps)
return -ENODEV; return -ENODEV;
down(&the_tps->lock); mutex_lock(&the_tps->lock);
pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME, pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
i2c_smbus_read_byte_data(&the_tps->client, TPS_VREGS1)); i2c_smbus_read_byte_data(&the_tps->client, TPS_VREGS1));
@ -909,7 +910,7 @@ int tps65010_config_vregs1(unsigned value)
pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME, pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
i2c_smbus_read_byte_data(&the_tps->client, TPS_VREGS1)); i2c_smbus_read_byte_data(&the_tps->client, TPS_VREGS1));
up(&the_tps->lock); mutex_unlock(&the_tps->lock);
return status; return status;
} }
@ -931,7 +932,7 @@ int tps65013_set_low_pwr(unsigned mode)
if (!the_tps || the_tps->por) if (!the_tps || the_tps->por)
return -ENODEV; return -ENODEV;
down(&the_tps->lock); mutex_lock(&the_tps->lock);
pr_debug("%s: %s low_pwr, chgconfig 0x%02x vdcdc1 0x%02x\n", pr_debug("%s: %s low_pwr, chgconfig 0x%02x vdcdc1 0x%02x\n",
DRIVER_NAME, DRIVER_NAME,
@ -959,7 +960,7 @@ int tps65013_set_low_pwr(unsigned mode)
if (status != 0) { if (status != 0) {
printk(KERN_ERR "%s: Failed to write chconfig register\n", printk(KERN_ERR "%s: Failed to write chconfig register\n",
DRIVER_NAME); DRIVER_NAME);
up(&the_tps->lock); mutex_unlock(&the_tps->lock);
return status; return status;
} }
@ -977,7 +978,7 @@ int tps65013_set_low_pwr(unsigned mode)
pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME, pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME,
i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC1)); i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC1));
up(&the_tps->lock); mutex_unlock(&the_tps->lock);
return status; return status;
} }

34
drivers/i2c/i2c-core.c
View File

@ -169,8 +169,8 @@ int i2c_add_adapter(struct i2c_adapter *adap)
} }
adap->nr = id & MAX_ID_MASK; adap->nr = id & MAX_ID_MASK;
init_MUTEX(&adap->bus_lock); mutex_init(&adap->bus_lock);
init_MUTEX(&adap->clist_lock); mutex_init(&adap->clist_lock);
list_add_tail(&adap->list,&adapters); list_add_tail(&adap->list,&adapters);
INIT_LIST_HEAD(&adap->clients); INIT_LIST_HEAD(&adap->clients);
@ -385,9 +385,9 @@ int i2c_check_addr(struct i2c_adapter *adapter, int addr)
{ {
int rval; int rval;
down(&adapter->clist_lock); mutex_lock(&adapter->clist_lock);
rval = __i2c_check_addr(adapter, addr); rval = __i2c_check_addr(adapter, addr);
up(&adapter->clist_lock); mutex_unlock(&adapter->clist_lock);
return rval; return rval;
} }
@ -396,13 +396,13 @@ int i2c_attach_client(struct i2c_client *client)
{ {
struct i2c_adapter *adapter = client->adapter; struct i2c_adapter *adapter = client->adapter;
down(&adapter->clist_lock); mutex_lock(&adapter->clist_lock);
if (__i2c_check_addr(client->adapter, client->addr)) { if (__i2c_check_addr(client->adapter, client->addr)) {
up(&adapter->clist_lock); mutex_unlock(&adapter->clist_lock);
return -EBUSY; return -EBUSY;
} }
list_add_tail(&client->list,&adapter->clients); list_add_tail(&client->list,&adapter->clients);
up(&adapter->clist_lock); mutex_unlock(&adapter->clist_lock);
if (adapter->client_register) { if (adapter->client_register) {
if (adapter->client_register(client)) { if (adapter->client_register(client)) {
@ -451,12 +451,12 @@ int i2c_detach_client(struct i2c_client *client)
} }
} }
down(&adapter->clist_lock); mutex_lock(&adapter->clist_lock);
list_del(&client->list); list_del(&client->list);
init_completion(&client->released); init_completion(&client->released);
device_remove_file(&client->dev, &dev_attr_client_name); device_remove_file(&client->dev, &dev_attr_client_name);
device_unregister(&client->dev); device_unregister(&client->dev);
up(&adapter->clist_lock); mutex_unlock(&adapter->clist_lock);
wait_for_completion(&client->released); wait_for_completion(&client->released);
out: out:
@ -514,19 +514,19 @@ void i2c_clients_command(struct i2c_adapter *adap, unsigned int cmd, void *arg)
struct list_head *item; struct list_head *item;
struct i2c_client *client; struct i2c_client *client;
down(&adap->clist_lock); mutex_lock(&adap->clist_lock);
list_for_each(item,&adap->clients) { list_for_each(item,&adap->clients) {
client = list_entry(item, struct i2c_client, list); client = list_entry(item, struct i2c_client, list);
if (!try_module_get(client->driver->driver.owner)) if (!try_module_get(client->driver->driver.owner))
continue; continue;
if (NULL != client->driver->command) { if (NULL != client->driver->command) {
up(&adap->clist_lock); mutex_unlock(&adap->clist_lock);
client->driver->command(client,cmd,arg); client->driver->command(client,cmd,arg);
down(&adap->clist_lock); mutex_lock(&adap->clist_lock);
} }
module_put(client->driver->driver.owner); module_put(client->driver->driver.owner);
} }
up(&adap->clist_lock); mutex_unlock(&adap->clist_lock);
} }
static int __init i2c_init(void) static int __init i2c_init(void)
@ -570,9 +570,9 @@ int i2c_transfer(struct i2c_adapter * adap, struct i2c_msg *msgs, int num)
} }
#endif #endif
down(&adap->bus_lock); mutex_lock(&adap->bus_lock);
ret = adap->algo->master_xfer(adap,msgs,num); ret = adap->algo->master_xfer(adap,msgs,num);
up(&adap->bus_lock); mutex_unlock(&adap->bus_lock);
return ret; return ret;
} else { } else {
@ -1116,10 +1116,10 @@ s32 i2c_smbus_xfer(struct i2c_adapter * adapter, u16 addr, unsigned short flags,
flags &= I2C_M_TEN | I2C_CLIENT_PEC; flags &= I2C_M_TEN | I2C_CLIENT_PEC;
if (adapter->algo->smbus_xfer) { if (adapter->algo->smbus_xfer) {
down(&adapter->bus_lock); mutex_lock(&adapter->bus_lock);
res = adapter->algo->smbus_xfer(adapter,addr,flags,read_write, res = adapter->algo->smbus_xfer(adapter,addr,flags,read_write,
command,size,data); command,size,data);
up(&adapter->bus_lock); mutex_unlock(&adapter->bus_lock);
} else } else
res = i2c_smbus_xfer_emulated(adapter,addr,flags,read_write, res = i2c_smbus_xfer_emulated(adapter,addr,flags,read_write,
command,size,data); command,size,data);

6
include/linux/i2c.h
View File

@ -32,7 +32,7 @@
#include <linux/mod_devicetable.h> #include <linux/mod_devicetable.h>
#include <linux/device.h> /* for struct device */ #include <linux/device.h> /* for struct device */
#include <linux/sched.h> /* for completion */ #include <linux/sched.h> /* for completion */
#include <asm/semaphore.h> #include <linux/mutex.h>
/* --- For i2c-isa ---------------------------------------------------- */ /* --- For i2c-isa ---------------------------------------------------- */
@ -225,8 +225,8 @@ struct i2c_adapter {
int (*client_unregister)(struct i2c_client *); int (*client_unregister)(struct i2c_client *);
/* data fields that are valid for all devices */ /* data fields that are valid for all devices */
struct semaphore bus_lock; struct mutex bus_lock;
struct semaphore clist_lock; struct mutex clist_lock;
int timeout; int timeout;
int retries; int retries;