cifs: Fix missing error code set

In cifs_strict_readv(), the default rc (-EACCES) is accidentally cleared by
a successful return from netfs_start_io_direct(), such that if
cifs_find_lock_conflict() fails, we don't return an error.

Fix this by resetting the default error code.

Fixes: 14b1cd25346b ("cifs: Fix locking in cifs_strict_readv()")
Cc: [e-mail]
Signed-off-by: David Howells <[e-mail]>
Reviewed-by: Paulo Alcantara (Red Hat) <[e-mail]>
cc: Jeff Layton <[e-mail]>
cc: [e-mail]
cc: [e-mail]
cc: [e-mail]
Signed-off-by: Steve French <[e-mail]>

fs/smb/client/file.c

···
 		rc = netfs_start_io_direct(inode);
 		if (rc < 0)
 			goto out;
+		rc = -EACCES;
 		down_read(&cinode->lock_sem);
 		if (!cifs_find_lock_conflict(
 			    cfile, iocb->ki_pos, iov_iter_count(to),
···
 		rc = netfs_start_io_read(inode);
 		if (rc < 0)
 			goto out;
+		rc = -EACCES;
 		down_read(&cinode->lock_sem);
 		if (!cifs_find_lock_conflict(
 			    cfile, iocb->ki_pos, iov_iter_count(to),