smb: client: change allocation requirements in smb2_compound_op

Currently, smb2_compound_op() allocates
struct smb2_compound_vars *vars using GFP_ATOMIC, although
smb2_compound_op() can sleep when it calls compound_send_recv()
before vars is freed.

Allocate vars using GFP_KERNEL.

Signed-off-by: Fredric Cover <fredric.cover.lkernel@gmail.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

Author: Fredric-Cover

fs/smb/client/smb2inode.c

@@ -230,7 +230,7 @@ static int smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon,
 	num_rqst = 0;
 	server = cifs_pick_channel(ses);
 
-	vars = kzalloc_obj(*vars, GFP_ATOMIC);
+	vars = kzalloc_obj(*vars, GFP_KERNEL);
 	if (vars == NULL) {
 		rc = -ENOMEM;
 		goto out;