shmem: Refactor shmem_symlink()

De-duplicate the error handling paths. No change in behavior is
expected.

Suggested-by: Jeff Layton <[email protected]>
Reviewed-by: Christoph Hellwig <[email protected]>
Signed-off-by: Chuck Lever <[email protected]>
Message-Id: <168814733654.530310.9958360833543413152.stgit@manet.1015granger.net>
Signed-off-by: Christian Brauner <[email protected]>

Author: chucklever

mm/shmem.c

@@ -3422,26 +3422,22 @@ static int shmem_symlink(struct mnt_idmap *idmap, struct inode *dir,
 
 	error = security_inode_init_security(inode, dir, &dentry->d_name,
 					     shmem_initxattrs, NULL);
-	if (error && error != -EOPNOTSUPP) {
-		iput(inode);
-		return error;
-	}
+	if (error && error != -EOPNOTSUPP)
+		goto out_iput;
 
 	inode->i_size = len-1;
 	if (len <= SHORT_SYMLINK_LEN) {
 		inode->i_link = kmemdup(symname, len, GFP_KERNEL);
 		if (!inode->i_link) {
-			iput(inode);
-			return -ENOMEM;
+			error = -ENOMEM;
+			goto out_iput;
 		}
 		inode->i_op = &shmem_short_symlink_operations;
 	} else {
 		inode_nohighmem(inode);
 		error = shmem_get_folio(inode, 0, &folio, SGP_WRITE);
-		if (error) {
-			iput(inode);
-			return error;
-		}
+		if (error)
+			goto out_iput;
 		inode->i_mapping->a_ops = &shmem_aops;
 		inode->i_op = &shmem_symlink_inode_operations;
 		memcpy(folio_address(folio), symname, len);
@@ -3456,6 +3452,9 @@ static int shmem_symlink(struct mnt_idmap *idmap, struct inode *dir,
 	d_instantiate(dentry, inode);
 	dget(dentry);
 	return 0;
+out_iput:
+	iput(inode);
+	return error;
 }
 
 static void shmem_put_link(void *arg)