From: Alexey Starikovskiy <astarikovskiy@suse.de>
Date: Tue, 11 Nov 2008 09:54:11 +0000 (+0300)
Subject: ACPI: EC: Don't do transaction from GPE handler in poll mode.
X-Git-Tag: v2.6.27.7~1
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=913d910d70e641d2c753d45d98587640219a78bc;p=karo-tx-linux.git

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 8fdbcbdebb55..41b8e7cad06e 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) &&