[Cluster-devel] [GFS2 PATCH] GFS2: Handle errors from rhashtable_walk_next

[Bob Peterson <rpeterso@redhat.com>]

Hi,

This patch was inspired by Dan Carpenter's email from 17 July.

This patch adds some needed error checking after calling function
rhashtable_walk_next.

Signed-off-by: Bob Peterson <rpeterso@redhat.com>
---
diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c
index 1b0dff4..15227a7 100644
--- a/fs/gfs2/glock.c
+++ b/fs/gfs2/glock.c
@@ -1794,6 +1794,11 @@ static void gfs2_glock_iter_next(struct gfs2_glock_rht_iter *gi)
 {
 	do {
 		gi->gl = rhashtable_walk_next(&gi->hti);
+		if (IS_ERR(gi->gl)) {
+			if (PTR_ERR(gi->gl) == -EAGAIN)
+				continue;
+			gi->gl = NULL;
+		}
 	/* Skip entries for other sb and dead entries */
 	} while ((gi->gl) && ((gi->sdp != gi->gl->gl_name.ln_sbd) ||
 			      __lockref_is_dead(&gi->gl->gl_lockref)));