[patch 46/46] ACPI: EC: Dont do transaction from GPE handler inpoll mode.

[Greg KH]

2.6.27-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Alexey Starikovskiy <astarikovskiy@xxxxxxx>

commit 8517934ef6aaa28d6e055b98df65b31cedbd1372 upstream.

Referencies: http://bugzilla.kernel.org/show_bug.cgi?id=12004

Signed-off-by: Alexey Starikovskiy <astarikovskiy@xxxxxxx>
Signed-off-by: Len Brown <len.brown@xxxxxxxxx>
Cc: Rafael J. Wysocki <rjw@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>

---
 drivers/acpi/ec.c |    9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -581,9 +581,12 @@ static u32 acpi_ec_gpe_handler(void *dat
 	pr_debug(PREFIX "~~~> interrupt\n");
 	status = acpi_ec_read_status(ec);
 
-	gpe_transaction(ec, status);
-	if (ec_transaction_done(ec) && (status & ACPI_EC_FLAG_IBF) == 0)
-		wake_up(&ec->wait);
+	if (test_bit(EC_FLAGS_GPE_MODE, &ec->flags)) {
+		gpe_transaction(ec, status);
+		if (ec_transaction_done(ec) &&
+		    (status & ACPI_EC_FLAG_IBF) == 0)
+			wake_up(&ec->wait);
+	}
 
 	ec_check_sci(ec, status);
 	if (!test_bit(EC_FLAGS_GPE_MODE, &ec->flags) &&

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