ext4: check for negative error code from sb_issue_discard

sb_issue_discard() is returning negative error code, so check for
-EOPNOTSUPP.

Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index d4714d6..53472e2 100644 (file)
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -2613,7 +2613,7 @@ static inline void ext4_issue_discard(struct super_block *sb,
        trace_ext4_discard_blocks(sb,
                        (unsigned long long) discard_block, count);
        ret = sb_issue_discard(sb, discard_block, count);
-       if (ret == EOPNOTSUPP) {
+       if (ret == -EOPNOTSUPP) {
                ext4_warning(sb, "discard not supported, disabling");
                clear_opt(EXT4_SB(sb)->s_mount_opt, DISCARD);
        }