[patch] ext4 crypto: fix some error handling

[Dan Carpenter]

We should be testing for -ENOMEM but the minus sign is missing.

Fixes: c9af28fdd449 ('ext4 crypto: don't let data integrity writebacks fail with ENOMEM')
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>

diff --git a/fs/ext4/page-io.c b/fs/ext4/page-io.c
index 51b3492..b39d9c7 100644
--- a/fs/ext4/page-io.c
+++ b/fs/ext4/page-io.c
@@ -477,7 +477,7 @@ int ext4_bio_write_page(struct ext4_io_submit *io,
 		data_page = ext4_encrypt(inode, page, gfp_flags);
 		if (IS_ERR(data_page)) {
 			ret = PTR_ERR(data_page);
-			if (ret == ENOMEM && wbc->sync_mode == WB_SYNC_ALL) {
+			if (ret == -ENOMEM && wbc->sync_mode == WB_SYNC_ALL) {
 				if (io->io_bio) {
 					ext4_io_submit(io);
 					congestion_wait(BLK_RW_ASYNC, HZ/50);