[patch] Btrfs: kmalloc() doesn't return an ERR_PTR

[Dan Carpenter]

The error handling was copy and pasted from memdup_user().  It should be
checking for NULL obviously.

Fixes: abccd00f8af2 ('btrfs: Fix 32/64-bit problem with 
BTRFS_SET_RECEIVED_SUBVOL ioctl')
Signed-off-by: Dan Carpenter <dan.carpen...@oracle.com>

diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 0401397..27d551c 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -4531,9 +4531,8 @@ static long btrfs_ioctl_set_received_subvol_32(struct 
file *file,
        }
 
        args64 = kmalloc(sizeof(*args64), GFP_NOFS);
-       if (IS_ERR(args64)) {
-               ret = PTR_ERR(args64);
-               args64 = NULL;
+       if (!args64) {
+               ret = -ENOMEM;
                goto out;
        }
 
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