From: William Morrow <william.morrow@xxxxxxx>
On some BIOSen, the GPE bit will remain set even if it is disabled,
resulting in a interrupt storm. This patch clears the bit before disabling
it.
Signed-off-by: William Morrow <william.morrow@xxxxxxx>
Signed-off-by: Jordan Crouse <jordan.crouse@xxxxxxx>
Cc: "Yu, Luming" <luming.yu@xxxxxxxxx>
Cc: "Brown, Len" <len.brown@xxxxxxxxx>
Cc: "Moore, Robert" <robert.moore@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
drivers/acpi/events/evgpe.c | 14 +++++++++++++-
1 file changed, 13 insertions(+), 1 deletion(-)
diff -puN drivers/acpi/events/evgpe.c~acpi-clear-gpe-before-disabling-it drivers/acpi/events/evgpe.c
--- a/drivers/acpi/events/evgpe.c~acpi-clear-gpe-before-disabling-it
+++ a/drivers/acpi/events/evgpe.c
@@ -677,10 +677,22 @@ acpi_ev_gpe_dispatch(struct acpi_gpe_eve
case ACPI_GPE_DISPATCH_METHOD:
/*
- * Disable GPE, so it doesn't keep firing before the method has a
+ * Clear GPE, so it doesn't keep firing before the method has a
* chance to run.
*/
+ status = acpi_hw_clear_gpe(gpe_event_info);
+ if (ACPI_FAILURE(status)) {
+ ACPI_EXCEPTION((AE_INFO, status,
+ "Unable to clear GPE[%2X]",
+ gpe_number));
+ return_UINT32(ACPI_INTERRUPT_NOT_HANDLED);
+ }
+ /*
+ * Disable GPE, so it doesn't keep happen again.
+ */
+
status = acpi_ev_disable_gpe(gpe_event_info);
+
if (ACPI_FAILURE(status)) {
ACPI_EXCEPTION((AE_INFO, status,
"Unable to disable GPE[%2X]",
_
-
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