btrfs: reada: Fix returned errno code
authorLuis de Bethencourt <luisbg@osg.samsung.com>
Tue, 20 Oct 2015 13:56:23 +0000 (14:56 +0100)
committerDavid Sterba <dsterba@suse.com>
Wed, 21 Oct 2015 16:29:50 +0000 (18:29 +0200)
commitddd664f4478a4aaf0ac67a4297e33f1992bc9be2
treecf3484128d2fbcb804f0791174e1e99ea208b11b
parent0b8d8ce0297c4376d50318692e0aa53a3aaed90c
btrfs: reada: Fix returned errno code

reada is using -1 instead of the -ENOMEM defined macro to specify that
a buffer allocation failed. Since the error number is propagated, the
caller will get a -EPERM which is the wrong error condition.

Also, updating the caller to return the exact value from
reada_add_block.

Smatch tool warning:
reada_add_block() warn: returning -1 instead of -ENOMEM is sloppy

Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: Luis de Bethencourt <luisbg@osg.samsung.com>
Signed-off-by: David Sterba <dsterba@suse.com>
fs/btrfs/reada.c