[PATCH 3/5] xfs: bump lost_prev_errors if we lose even the healthmon lost event

From: Darrick J. Wong <[email protected]>

LOLLM observes that we don't bump xfs_healthmon::lost_prev_event even if
we can't allocate or queue a LOST event, which means that events can
disappear silently when things are going very wrong.  Bump the counter
to avoid this problem.

Cc: <[email protected]> # v7.0
Fixes: b3a289a2a9397b ("xfs: create event queuing, formatting, and discovery infrastructure")
Signed-off-by: "Darrick J. Wong" <[email protected]>
Assisted-by: LOLLM # finding obvious bugs
---
 fs/xfs/xfs_healthmon.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)


diff --git a/fs/xfs/xfs_healthmon.c b/fs/xfs/xfs_healthmon.c
index a2ae15a262a510..234ec20e1faed5 100644
--- a/fs/xfs/xfs_healthmon.c
+++ b/fs/xfs/xfs_healthmon.c
@@ -329,8 +329,10 @@ xfs_healthmon_clear_lost_prev(
 	if (hm->events < XFS_HEALTHMON_MAX_EVENTS)
 		event = kmemdup(&lost_event, sizeof(struct xfs_healthmon_event),
 				GFP_NOFS);
-	if (!event)
+	if (!event) {
+		xfs_healthmon_bump_lost(hm);
 		return -ENOMEM;
+	}
 
 	__xfs_healthmon_push(hm, event);
 cleared: