[PATCH v3 08/13] drm/xe/configfs: Use guard() for dev->lock

[Lucas De Marchi <lucas.demarchi@intel.com>]

Instead of the manual lock()/unlock() pattern, use guard() which will
make things easier for handling errors or early returns.

Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
---
 drivers/gpu/drm/xe/xe_configfs.c | 13 +++++--------
 1 file changed, 5 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/xe/xe_configfs.c b/drivers/gpu/drm/xe/xe_configfs.c
index 8cf6b1375b7d4..4c2d4ff6a70f5 100644
--- a/drivers/gpu/drm/xe/xe_configfs.c
+++ b/drivers/gpu/drm/xe/xe_configfs.c
@@ -5,6 +5,7 @@
 
 #include <linux/bitops.h>
 #include <linux/configfs.h>
+#include <linux/cleanup.h>
 #include <linux/find.h>
 #include <linux/init.h>
 #include <linux/module.h>
@@ -164,9 +165,8 @@ static ssize_t survivability_mode_store(struct config_item *item, const char *pa
 	if (ret)
 		return ret;
 
-	mutex_lock(&dev->lock);
+	guard(mutex)(&dev->lock);
 	dev->config.survivability_mode = survivability_mode;
-	mutex_unlock(&dev->lock);
 
 	return len;
 }
@@ -248,9 +248,8 @@ static ssize_t engines_allowed_store(struct config_item *item, const char *page,
 		val |= mask;
 	}
 
-	mutex_lock(&dev->lock);
+	guard(mutex)(&dev->lock);
 	dev->config.engines_allowed = val;
-	mutex_unlock(&dev->lock);
 
 	return len;
 }
@@ -272,9 +271,8 @@ static ssize_t enable_psmi_store(struct config_item *item, const char *page, siz
 	if (ret)
 		return ret;
 
-	mutex_lock(&dev->lock);
+	guard(mutex)(&dev->lock);
 	dev->config.enable_psmi = val;
-	mutex_unlock(&dev->lock);
 
 	return len;
 }
@@ -454,9 +452,8 @@ void xe_configfs_clear_survivability_mode(struct pci_dev *pdev)
 	if (!dev)
 		return;
 
-	mutex_lock(&dev->lock);
+	guard(mutex)(&dev->lock);
 	dev->config.survivability_mode = 0;
-	mutex_unlock(&dev->lock);
 
 	config_group_put(&dev->group);
 }

-- 
2.50.1