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ACPI: execute Notify() handlers on new thread

Bladeren bron 
http://bugzilla.kernel.org/show_bug.cgi?id=5534

Thanks to Peter Wainwright for isolating the issue.
Thanks to Andi Kleen and Bob Moore for feedback.
Thanks to Richard Mace and others for testing.
Updates by Konstantin Karasyov.

Signed-off-by: Konstantin Karasyov <konstantin.a.karasyov@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Alexey Starikovskiy
2006-05-05 03:23:00 -04:00
gecommit door Len Brown
bovenliggende 958dd242b6
commit b8d35192c5
3 gewijzigde bestanden met toevoegingen van 56 en 32 verwijderingen
Download Patch-bestand Download Diff-bestand Expand all files Collapse all files

80
drivers/acpi/osl.c
Bestand weergeven

@@ -37,6 +37,7 @@
#include <linux/delay.h>
#include <linux/workqueue.h>
#include <linux/nmi.h>
#include <linux/kthread.h>
#include <acpi/acpi.h>
#include <asm/io.h>
#include <acpi/acpi_bus.h>
@@ -600,23 +601,41 @@ static void acpi_os_execute_deferred(void *context)
return_VOID;
}
acpi_status
acpi_os_queue_for_execution(u32 priority,
static int acpi_os_execute_thread(void *context)
{
struct acpi_os_dpc *dpc = (struct acpi_os_dpc *)context;
if (dpc) {
dpc->function(dpc->context);
kfree(dpc);
}
do_exit(0);
}
/*******************************************************************************
*
* FUNCTION: acpi_os_execute
*
* PARAMETERS: Type - Type of the callback
* Function - Function to be executed
* Context - Function parameters
*
* RETURN: Status
*
* DESCRIPTION: Depending on type, either queues function for deferred execution or
* immediately executes function on a separate thread.
*
******************************************************************************/
acpi_status acpi_os_execute(acpi_execute_type type,
acpi_osd_exec_callback function, void *context)
{
acpi_status status = AE_OK;
struct acpi_os_dpc *dpc;
struct work_struct *task;
ACPI_FUNCTION_TRACE("os_queue_for_execution");
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
"Scheduling function [%p(%p)] for deferred execution.\n",
function, context));
struct task_struct *p;
if (!function)
return_ACPI_STATUS(AE_BAD_PARAMETER);
return AE_BAD_PARAMETER;
/*
* Allocate/initialize DPC structure. Note that this memory will be
* freed by the callee. The kernel handles the tq_struct list in a
@@ -627,30 +646,37 @@ acpi_os_queue_for_execution(u32 priority,
* We can save time and code by allocating the DPC and tq_structs
* from the same memory.
*/
dpc =
kmalloc(sizeof(struct acpi_os_dpc) + sizeof(struct work_struct),
GFP_ATOMIC);
if (type == OSL_NOTIFY_HANDLER) {
dpc = kmalloc(sizeof(struct acpi_os_dpc), GFP_KERNEL);
} else {
dpc = kmalloc(sizeof(struct acpi_os_dpc) +
sizeof(struct work_struct), GFP_ATOMIC);
}
if (!dpc)
return_ACPI_STATUS(AE_NO_MEMORY);
return AE_NO_MEMORY;
dpc->function = function;
dpc->context = context;
task = (void *)(dpc + 1);
INIT_WORK(task, acpi_os_execute_deferred, (void *)dpc);
if (!queue_work(kacpid_wq, task)) {
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
"Call to queue_work() failed.\n"));
kfree(dpc);
status = AE_ERROR;
if (type == OSL_NOTIFY_HANDLER) {
p = kthread_create(acpi_os_execute_thread, dpc, "kacpid_notify");
if (!IS_ERR(p)) {
wake_up_process(p);
} else {
status = AE_NO_MEMORY;
kfree(dpc);
}
} else {
task = (void *)(dpc + 1);
INIT_WORK(task, acpi_os_execute_deferred, (void *)dpc);
if (!queue_work(kacpid_wq, task)) {
status = AE_ERROR;
kfree(dpc);
}
}
return_ACPI_STATUS(status);
return status;
}
EXPORT_SYMBOL(acpi_os_queue_for_execution);
EXPORT_SYMBOL(acpi_os_execute);
void acpi_os_wait_events_complete(void *context)
{