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-rw-r--r--drivers/acpi/acpica/evgpe.c57
1 files changed, 45 insertions, 12 deletions
diff --git a/drivers/acpi/acpica/evgpe.c b/drivers/acpi/acpica/evgpe.c
index 3fb621eec2fa..c25999546c8c 100644
--- a/drivers/acpi/acpica/evgpe.c
+++ b/drivers/acpi/acpica/evgpe.c
@@ -52,6 +52,8 @@ ACPI_MODULE_NAME("evgpe")
/* Local prototypes */
static void ACPI_SYSTEM_XFACE acpi_ev_asynch_execute_gpe_method(void *context);
+static void ACPI_SYSTEM_XFACE acpi_ev_asynch_enable_gpe(void *context);
+
/*******************************************************************************
*
* FUNCTION: acpi_ev_update_gpe_enable_mask
@@ -441,17 +443,25 @@ u32 acpi_ev_gpe_detect(struct acpi_gpe_xrupt_info * gpe_xrupt_list)
* an interrupt handler.
*
******************************************************************************/
-static void acpi_ev_asynch_enable_gpe(void *context);
static void ACPI_SYSTEM_XFACE acpi_ev_asynch_execute_gpe_method(void *context)
{
- struct acpi_gpe_event_info *gpe_event_info = (void *)context;
+ struct acpi_gpe_event_info *gpe_event_info = context;
acpi_status status;
- struct acpi_gpe_event_info local_gpe_event_info;
+ struct acpi_gpe_event_info *local_gpe_event_info;
struct acpi_evaluate_info *info;
ACPI_FUNCTION_TRACE(ev_asynch_execute_gpe_method);
+ /* Allocate a local GPE block */
+
+ local_gpe_event_info =
+ ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_gpe_event_info));
+ if (!local_gpe_event_info) {
+ ACPI_EXCEPTION((AE_INFO, AE_NO_MEMORY, "while handling a GPE"));
+ return_VOID;
+ }
+
status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
if (ACPI_FAILURE(status)) {
return_VOID;
@@ -468,7 +478,7 @@ static void ACPI_SYSTEM_XFACE acpi_ev_asynch_execute_gpe_method(void *context)
* Take a snapshot of the GPE info for this level - we copy the info to
* prevent a race condition with remove_handler/remove_block.
*/
- ACPI_MEMCPY(&local_gpe_event_info, gpe_event_info,
+ ACPI_MEMCPY(local_gpe_event_info, gpe_event_info,
sizeof(struct acpi_gpe_event_info));
status = acpi_ut_release_mutex(ACPI_MTX_EVENTS);
@@ -480,7 +490,7 @@ static void ACPI_SYSTEM_XFACE acpi_ev_asynch_execute_gpe_method(void *context)
* Must check for control method type dispatch one more time to avoid a
* race with ev_gpe_install_handler
*/
- if ((local_gpe_event_info.flags & ACPI_GPE_DISPATCH_MASK) ==
+ if ((local_gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) ==
ACPI_GPE_DISPATCH_METHOD) {
/* Allocate the evaluation information block */
@@ -494,7 +504,7 @@ static void ACPI_SYSTEM_XFACE acpi_ev_asynch_execute_gpe_method(void *context)
* control method that corresponds to this GPE
*/
info->prefix_node =
- local_gpe_event_info.dispatch.method_node;
+ local_gpe_event_info->dispatch.method_node;
info->flags = ACPI_IGNORE_RETURN_VALUE;
status = acpi_ns_evaluate(info);
@@ -505,20 +515,41 @@ static void ACPI_SYSTEM_XFACE acpi_ev_asynch_execute_gpe_method(void *context)
ACPI_EXCEPTION((AE_INFO, status,
"while evaluating GPE method [%4.4s]",
acpi_ut_get_node_name
- (local_gpe_event_info.dispatch.
+ (local_gpe_event_info->dispatch.
method_node)));
}
}
+
/* Defer enabling of GPE until all notify handlers are done */
- acpi_os_execute(OSL_NOTIFY_HANDLER, acpi_ev_asynch_enable_gpe,
- gpe_event_info);
+
+ status = acpi_os_execute(OSL_NOTIFY_HANDLER,
+ acpi_ev_asynch_enable_gpe,
+ local_gpe_event_info);
+ if (ACPI_FAILURE(status)) {
+ ACPI_FREE(local_gpe_event_info);
+ }
return_VOID;
}
-static void acpi_ev_asynch_enable_gpe(void *context)
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ev_asynch_enable_gpe
+ *
+ * PARAMETERS: Context (gpe_event_info) - Info for this GPE
+ * Callback from acpi_os_execute
+ *
+ * RETURN: None
+ *
+ * DESCRIPTION: Asynchronous clear/enable for GPE. This allows the GPE to
+ * complete.
+ *
+ ******************************************************************************/
+
+static void ACPI_SYSTEM_XFACE acpi_ev_asynch_enable_gpe(void *context)
{
struct acpi_gpe_event_info *gpe_event_info = context;
acpi_status status;
+
if ((gpe_event_info->flags & ACPI_GPE_XRUPT_TYPE_MASK) ==
ACPI_GPE_LEVEL_TRIGGERED) {
/*
@@ -527,7 +558,7 @@ static void acpi_ev_asynch_enable_gpe(void *context)
*/
status = acpi_hw_clear_gpe(gpe_event_info);
if (ACPI_FAILURE(status)) {
- return_VOID;
+ goto exit;
}
}
@@ -537,7 +568,9 @@ static void acpi_ev_asynch_enable_gpe(void *context)
*/
(void)acpi_hw_low_set_gpe(gpe_event_info, ACPI_GPE_CONDITIONAL_ENABLE);
- return_VOID;
+exit:
+ ACPI_FREE(gpe_event_info);
+ return;
}
/*******************************************************************************