drivers/gpu/drm/drm_sysfs.c: sysfs files error handling

error27 · airlied · commit a1c4560d4d89 · 2010-04-28T18:42:52.000+10:00
In the original code we used "j" as an iterator but we used "i" as an
index.

-               for (j = 0; j &lt; i; j++)
-                       device_remove_file(&amp;connector-&gt;kdev,
-                                          &amp;connector_attrs[i]);

Smatch complained about that because "i" was potentially passed the end of
the array.  Which makes sense if we should be using "j" there.

I also thought that we should remove the files for &amp;connector_attrs_opt1
but to do that I had to add separate iterators for &amp;connector_attrs and
&amp;connector_attrs_opt1.

Signed-off-by: Dan Carpenter &lt;error27@gmail.com&gt;
Cc: Greg Kroah-Hartman &lt;gregkh@suse.de&gt;
Signed-off-by: Andrew Morton &lt;akpm@linux-foundation.org&gt;
Signed-off-by: Dave Airlie &lt;airlied@redhat.com&gt;
diff --git a/drivers/gpu/drm/drm_sysfs.c b/drivers/gpu/drm/drm_sysfs.c
@@ -353,7 +353,10 @@ static struct bin_attribute edid_attr = {
 int drm_sysfs_connector_add(struct drm_connector *connector)
 {
 	struct drm_device *dev = connector->dev;
-	int ret = 0, i, j;
+	int attr_cnt = 0;
+	int opt_cnt = 0;
+	int i;
+	int ret = 0;
 
 	/* We shouldn't get called more than once for the same connector */
 	BUG_ON(device_is_registered(&connector->kdev));
@@ -376,8 +379,8 @@ int drm_sysfs_connector_add(struct drm_connector *connector)
 
 	/* Standard attributes */
 
-	for (i = 0; i < ARRAY_SIZE(connector_attrs); i++) {
-		ret = device_create_file(&connector->kdev, &connector_attrs[i]);
+	for (attr_cnt = 0; attr_cnt < ARRAY_SIZE(connector_attrs); attr_cnt++) {
+		ret = device_create_file(&connector->kdev, &connector_attrs[attr_cnt]);
 		if (ret)
 			goto err_out_files;
 	}
@@ -393,8 +396,8 @@ int drm_sysfs_connector_add(struct drm_connector *connector)
 		case DRM_MODE_CONNECTOR_SVIDEO:
 		case DRM_MODE_CONNECTOR_Component:
 		case DRM_MODE_CONNECTOR_TV:
-			for (i = 0; i < ARRAY_SIZE(connector_attrs_opt1); i++) {
-				ret = device_create_file(&connector->kdev, &connector_attrs_opt1[i]);
+			for (opt_cnt = 0; opt_cnt < ARRAY_SIZE(connector_attrs_opt1); opt_cnt++) {
+				ret = device_create_file(&connector->kdev, &connector_attrs_opt1[opt_cnt]);
 				if (ret)
 					goto err_out_files;
 			}
@@ -413,10 +416,10 @@ int drm_sysfs_connector_add(struct drm_connector *connector)
 	return 0;
 
 err_out_files:
-	if (i > 0)
-		for (j = 0; j < i; j++)
-			device_remove_file(&connector->kdev,
-					   &connector_attrs[i]);
+	for (i = 0; i < opt_cnt; i++)
+		device_remove_file(&connector->kdev, &connector_attrs_opt1[i]);
+	for (i = 0; i < attr_cnt; i++)
+		device_remove_file(&connector->kdev, &connector_attrs[i]);
 	device_unregister(&connector->kdev);
 
 out:
