block: Cocci spatch "ptr_ret.spatch"

diff -u -p a/block/blk-core.c b/block/blk-core.c
@@ -1626,7 +1626,7 @@ static int __init fail_make_request_debu
 	struct dentry *dir = fault_create_debugfs_attr("fail_make_request",
 						NULL, &fail_make_request);
 
-	return IS_ERR(dir) ? PTR_ERR(dir) : 0;
+	return PTR_RET(dir);
 }
 
 late_initcall(fail_make_request_debugfs);

diff -u -p a/block/blk-timeout.c b/block/blk-timeout.c
@@ -31,7 +31,7 @@ static int __init fail_io_timeout_debugf
 	struct dentry *dir = fault_create_debugfs_attr("fail_io_timeout",
 						NULL, &fail_io_timeout);
 
-	return IS_ERR(dir) ? PTR_ERR(dir) : 0;
+	return PTR_RET(dir);
 }
 
 late_initcall(fail_io_timeout_debugfs);

diff -u -p a/block/ioctl.c b/block/ioctl.c
@@ -64,7 +64,7 @@ static int blkpg_ioctl(struct block_devi
 			part = add_partition(disk, partno, start, length,
 					     ADDPART_FLAG_NONE, NULL);
 			mutex_unlock(&bdev->bd_mutex);
-			return IS_ERR(part) ? PTR_ERR(part) : 0;
+			return PTR_RET(part);
 		case BLKPG_DEL_PARTITION:
 			part = disk_get_part(disk, partno);
 			if (!part)