ACPI: EC: Don't do transaction from GPE handler in poll mode.

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

Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 6 insertions, 3 deletions

diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index ab84f99f136..bd1af3e9e4c 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -581,9 +581,12 @@ static u32 acpi_ec_gpe_handler(void *data)
         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) &&