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path: root/drivers/acpi/scan.c
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Diffstat (limited to 'drivers/acpi/scan.c')
-rw-r--r--drivers/acpi/scan.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index d2e3c3e3f9c9..69bc0d888c01 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -247,6 +247,7 @@ static int create_of_modalias(struct acpi_device *acpi_dev, char *modalias,
static struct acpi_device *acpi_companion_match(const struct device *dev)
{
struct acpi_device *adev;
+ struct mutex *physical_node_lock;
adev = ACPI_COMPANION(dev);
if (!adev)
@@ -255,7 +256,8 @@ static struct acpi_device *acpi_companion_match(const struct device *dev)
if (list_empty(&adev->pnp.ids))
return NULL;
- mutex_lock(&adev->physical_node_lock);
+ physical_node_lock = &adev->physical_node_lock;
+ mutex_lock(physical_node_lock);
if (list_empty(&adev->physical_node_list)) {
adev = NULL;
} else {
@@ -266,7 +268,7 @@ static struct acpi_device *acpi_companion_match(const struct device *dev)
if (node->dev != dev)
adev = NULL;
}
- mutex_unlock(&adev->physical_node_lock);
+ mutex_unlock(physical_node_lock);
return adev;
}