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ACPI: thinkpad-acpi: use killable instead of interruptible mutexes

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Unfortunately, POSIX in all of its braindamage, do not state that userspace has
to deal with EINTR in read/write and friends... so, lesser code just doesn't.

Switch from *_interruptible to *_killable on the sysfs- and procfs-related
mutexes.  This closes this possible can of worms.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Henrique de Moraes Holschuh 2009-01-11 03:01:04 -02:00 committed by Len Brown
parent 0045c0aa7d
commit 7646ea88af
1 changed files with 13 additions and 13 deletions
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26
drivers/platform/x86/thinkpad_acpi.c
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@ -1878,7 +1878,7 @@ static ssize_t hotkey_mask_show(struct device *dev,
{
int res;
if (mutex_lock_interruptible(&hotkey_mutex))
if (mutex_lock_killable(&hotkey_mutex))
return -ERESTARTSYS;
res = hotkey_mask_get();
mutex_unlock(&hotkey_mutex);
@ -1897,7 +1897,7 @@ static ssize_t hotkey_mask_store(struct device *dev,
if (parse_strtoul(buf, 0xffffffffUL, &t))
return -EINVAL;
if (mutex_lock_interruptible(&hotkey_mutex))
if (mutex_lock_killable(&hotkey_mutex))
return -ERESTARTSYS;
res = hotkey_mask_set(t);
@ -1983,7 +1983,7 @@ static ssize_t hotkey_source_mask_store(struct device *dev,
((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
return -EINVAL;
if (mutex_lock_interruptible(&hotkey_mutex))
if (mutex_lock_killable(&hotkey_mutex))
return -ERESTARTSYS;
HOTKEY_CONFIG_CRITICAL_START
@ -2018,7 +2018,7 @@ static ssize_t hotkey_poll_freq_store(struct device *dev,
if (parse_strtoul(buf, 25, &t))
return -EINVAL;
if (mutex_lock_interruptible(&hotkey_mutex))
if (mutex_lock_killable(&hotkey_mutex))
return -ERESTARTSYS;
hotkey_poll_freq = t;
@ -2754,7 +2754,7 @@ static int hotkey_read(char *p)
return len;
}
if (mutex_lock_interruptible(&hotkey_mutex))
if (mutex_lock_killable(&hotkey_mutex))
return -ERESTARTSYS;
res = hotkey_status_get(&status);
if (!res)
@ -2785,7 +2785,7 @@ static int hotkey_write(char *buf)
if (!tp_features.hotkey)
return -ENODEV;
if (mutex_lock_interruptible(&hotkey_mutex))
if (mutex_lock_killable(&hotkey_mutex))
return -ERESTARTSYS;
status = -1;
@ -5311,7 +5311,7 @@ static int brightness_set(int value)
value < 0)
return -EINVAL;
res = mutex_lock_interruptible(&brightness_mutex);
res = mutex_lock_killable(&brightness_mutex);
if (res < 0)
return res;
@ -5849,7 +5849,7 @@ static int fan_get_status_safe(u8 *status)
int rc;
u8 s;
if (mutex_lock_interruptible(&fan_mutex))
if (mutex_lock_killable(&fan_mutex))
return -ERESTARTSYS;
rc = fan_get_status(&s);
if (!rc)
@ -5932,7 +5932,7 @@ static int fan_set_level_safe(int level)
if (!fan_control_allowed)
return -EPERM;
if (mutex_lock_interruptible(&fan_mutex))
if (mutex_lock_killable(&fan_mutex))
return -ERESTARTSYS;
if (level == TPACPI_FAN_LAST_LEVEL)
@ -5954,7 +5954,7 @@ static int fan_set_enable(void)
if (!fan_control_allowed)
return -EPERM;
if (mutex_lock_interruptible(&fan_mutex))
if (mutex_lock_killable(&fan_mutex))
return -ERESTARTSYS;
switch (fan_control_access_mode) {
@ -6009,7 +6009,7 @@ static int fan_set_disable(void)
if (!fan_control_allowed)
return -EPERM;
if (mutex_lock_interruptible(&fan_mutex))
if (mutex_lock_killable(&fan_mutex))
return -ERESTARTSYS;
rc = 0;
@ -6047,7 +6047,7 @@ static int fan_set_speed(int speed)
if (!fan_control_allowed)
return -EPERM;
if (mutex_lock_interruptible(&fan_mutex))
if (mutex_lock_killable(&fan_mutex))
return -ERESTARTSYS;
rc = 0;
@ -6249,7 +6249,7 @@ static ssize_t fan_pwm1_store(struct device *dev,
/* scale down from 0-255 to 0-7 */
newlevel = (s >> 5) & 0x07;
if (mutex_lock_interruptible(&fan_mutex))
if (mutex_lock_killable(&fan_mutex))
return -ERESTARTSYS;
rc = fan_get_status(&status);