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

commit 8517934ef6aaa28d6e055b98df65b31cedbd1372 upstream.

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>
Cc: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index 8fdbcbd..41b8e7c 100644 (file)
--- 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) &&