From: Abhi Das <adas@redhat.com>
Date: Mon, 8 Jun 2015 16:20:50 +0000 (-0500)
Subject: gfs2: s64 cast for negative quota value
X-Git-Tag: firefly_0821_release~176^2~1537^2~3
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=1bdf45352e1897ab02632a4ed3648db8cc183f71;p=firefly-linux-kernel-4.4.55.git

gfs2: s64 cast for negative quota value

One-line fix to cast quota value to s64 before comparison.
By default the quantity is treated as u64.

Signed-off-by: Abhi Das <adas@redhat.com>
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Acked-by: Steven Whitehouse <swhiteho@redhat.com>
---

diff --git a/fs/gfs2/quota.c b/fs/gfs2/quota.c
index dcd598aa2691..c2607a26be89 100644
--- a/fs/gfs2/quota.c
+++ b/fs/gfs2/quota.c
@@ -798,7 +798,7 @@ static int gfs2_adjust_quota(struct gfs2_inode *ip, loff_t loc,
 	loc -= sizeof(q); /* gfs2_internal_read would've advanced the loc ptr */
 	err = -EIO;
 	be64_add_cpu(&q.qu_value, change);
-	if (be64_to_cpu(q.qu_value) < 0)
+	if (((s64)be64_to_cpu(q.qu_value)) < 0)
 		q.qu_value = 0; /* Never go negative on quota usage */
 	qd->qd_qb.qb_value = q.qu_value;
 	if (fdq) {