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ACPI: replace spin_lock_irq with mutex for ec poll mode

Browse Source 
http://bugzilla.kernel.org/show_bug.cgi?id=5764

Signed-off-by: Luming Yu <luming.yu@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Rich Townsend 2005-12-19 23:07:00 -05:00 committed by Len Brown
parent a54c9d30db
commit f9a6ee1afb
1 changed files with 29 additions and 22 deletions
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51
drivers/acpi/ec.c
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@ -116,7 +116,7 @@ union acpi_ec {
struct acpi_generic_address command_addr;
struct acpi_generic_address data_addr;
unsigned long global_lock;
spinlock_t lock;
struct semaphore sem;
} poll;
};
@ -323,7 +323,6 @@ static int acpi_ec_poll_read(union acpi_ec *ec, u8 address, u32 * data)
{
acpi_status status = AE_OK;
int result = 0;
unsigned long flags = 0;
u32 glk = 0;
ACPI_FUNCTION_TRACE("acpi_ec_read");
@ -339,8 +338,11 @@ static int acpi_ec_poll_read(union acpi_ec *ec, u8 address, u32 * data)
return_VALUE(-ENODEV);
}
spin_lock_irqsave(&ec->poll.lock, flags);
if (down_interruptible(&ec->poll.sem)) {
result = -ERESTARTSYS;
goto end_nosem;
}
acpi_hw_low_level_write(8, ACPI_EC_COMMAND_READ,
&ec->common.command_addr);
result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE);
@ -358,8 +360,8 @@ static int acpi_ec_poll_read(union acpi_ec *ec, u8 address, u32 * data)
*data, address));
end:
spin_unlock_irqrestore(&ec->poll.lock, flags);
up(&ec->poll.sem);
end_nosem:
if (ec->common.global_lock)
acpi_release_global_lock(glk);
@ -370,7 +372,6 @@ static int acpi_ec_poll_write(union acpi_ec *ec, u8 address, u8 data)
{
int result = 0;
acpi_status status = AE_OK;
unsigned long flags = 0;
u32 glk = 0;
ACPI_FUNCTION_TRACE("acpi_ec_write");
@ -384,8 +385,11 @@ static int acpi_ec_poll_write(union acpi_ec *ec, u8 address, u8 data)
return_VALUE(-ENODEV);
}
spin_lock_irqsave(&ec->poll.lock, flags);
if (down_interruptible(&ec->poll.sem)) {
result = -ERESTARTSYS;
goto end_nosem;
}
acpi_hw_low_level_write(8, ACPI_EC_COMMAND_WRITE,
&ec->common.command_addr);
result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE);
@ -406,8 +410,8 @@ static int acpi_ec_poll_write(union acpi_ec *ec, u8 address, u8 data)
data, address));
end:
spin_unlock_irqrestore(&ec->poll.lock, flags);
up(&ec->poll.sem);
end_nosem:
if (ec->common.global_lock)
acpi_release_global_lock(glk);
@ -568,7 +572,6 @@ static int acpi_ec_poll_query(union acpi_ec *ec, u32 * data)
{
int result = 0;
acpi_status status = AE_OK;
unsigned long flags = 0;
u32 glk = 0;
ACPI_FUNCTION_TRACE("acpi_ec_query");
@ -589,8 +592,11 @@ static int acpi_ec_poll_query(union acpi_ec *ec, u32 * data)
* Note that successful completion of the query causes the ACPI_EC_SCI
* bit to be cleared (and thus clearing the interrupt source).
*/
spin_lock_irqsave(&ec->poll.lock, flags);
if (down_interruptible(&ec->poll.sem)) {
result = -ERESTARTSYS;
goto end_nosem;
}
acpi_hw_low_level_write(8, ACPI_EC_COMMAND_QUERY,
&ec->common.command_addr);
result = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF);
@ -602,8 +608,8 @@ static int acpi_ec_poll_query(union acpi_ec *ec, u32 * data)
result = -ENODATA;
end:
spin_unlock_irqrestore(&ec->poll.lock, flags);
up(&ec->poll.sem);
end_nosem:
if (ec->common.global_lock)
acpi_release_global_lock(glk);
@ -680,7 +686,6 @@ static void acpi_ec_gpe_poll_query(void *ec_cxt)
{
union acpi_ec *ec = (union acpi_ec *)ec_cxt;
u32 value = 0;
unsigned long flags = 0;
static char object_name[5] = { '_', 'Q', '0', '0', '\0' };
const char hex[] = { '0', '1', '2', '3', '4', '5', '6', '7',
'8', '9', 'A', 'B', 'C', 'D', 'E', 'F'
@ -691,9 +696,11 @@ static void acpi_ec_gpe_poll_query(void *ec_cxt)
if (!ec_cxt)
goto end;
spin_lock_irqsave(&ec->poll.lock, flags);
if (down_interruptible (&ec->poll.sem)) {
return_VOID;
}
acpi_hw_low_level_read(8, &value, &ec->common.command_addr);
spin_unlock_irqrestore(&ec->poll.lock, flags);
up(&ec->poll.sem);
/* TBD: Implement asynch events!
* NOTE: All we care about are EC-SCI's. Other EC events are
@ -1005,7 +1012,7 @@ static int acpi_ec_poll_add(struct acpi_device *device)
ec->common.handle = device->handle;
ec->common.uid = -1;
spin_lock_init(&ec->poll.lock);
init_MUTEX(&ec->poll.sem);
strcpy(acpi_device_name(device), ACPI_EC_DEVICE_NAME);
strcpy(acpi_device_class(device), ACPI_EC_CLASS);
acpi_driver_data(device) = ec;
@ -1300,7 +1307,7 @@ acpi_fake_ecdt_poll_callback(acpi_handle handle,
&ec_ecdt->common.gpe_bit);
if (ACPI_FAILURE(status))
return status;
spin_lock_init(&ec_ecdt->poll.lock);
init_MUTEX(&ec_ecdt->poll.sem);
ec_ecdt->common.global_lock = TRUE;
ec_ecdt->common.handle = handle;
@ -1416,7 +1423,7 @@ static int __init acpi_ec_poll_get_real_ecdt(void)
ec_ecdt->common.status_addr = ecdt_ptr->ec_control;
ec_ecdt->common.data_addr = ecdt_ptr->ec_data;
ec_ecdt->common.gpe_bit = ecdt_ptr->gpe_bit;
spin_lock_init(&ec_ecdt->poll.lock);
init_MUTEX(&ec_ecdt->poll.sem);
/* use the GL just to be safe */
ec_ecdt->common.global_lock = TRUE;
ec_ecdt->common.uid = ecdt_ptr->uid;