linux-kernel - [PATCH] ACPI/Power: Release resource_lock after acpi_power_get

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Date:	Tue, 15 Oct 2013 19:48:11 +0800
From:	Lan Tianyu <tianyu.lan@...el.com>
To:	lenb@...nel.org, rjw@...ysocki.net
Cc:	Lan Tianyu <tianyu.lan@...el.com>, linux-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] ACPI/Power: Release resource_lock after acpi_power_get_state() return error

resource_lock should be released when acpi_power_get_state() fails and before
passing to next power resource on the acpi power resource list.

Signed-off-by: Lan Tianyu <tianyu.lan@...el.com>
---
 drivers/acpi/power.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/acpi/power.c b/drivers/acpi/power.c
index 0dbe5cd..0c1c3ec 100644
--- a/drivers/acpi/power.c
+++ b/drivers/acpi/power.c
@@ -936,8 +936,10 @@ void acpi_resume_power_resources(void)
 		mutex_lock(&resource->resource_lock);
 
 		result = acpi_power_get_state(resource->device.handle, &state);
-		if (result)
+		if (result) {
+			mutex_unlock(&resource->resource_lock);
 			continue;
+		}
 
 		if (state == ACPI_POWER_RESOURCE_STATE_OFF
 		    && resource->ref_count) {
-- 
1.8.2.1

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