From c0b21f2e221e5edafb400e8acfa04db3ad5bf956 Mon Sep 17 00:00:00 2001
From: Eric Blake <eblake@redhat.com>
Date: Fri, 6 Nov 2020 14:36:11 -0600
Subject: [PATCH] nbd: Silence Coverity false positive
Coverity noticed (CID 1436125) that we check the return value of
nbd_extent_array_add in most places, but not at the end of
bitmap_to_extents(). The return value exists to break loops before a
future iteration, so there is nothing to check if we are already done
iterating. Adding a cast to void, plus a comment why, pacifies
Coverity.
Signed-off-by: Eric Blake <eblake@redhat.com>
Message-Id: <20201111163510.713855-1-eblake@redhat.com>
[eblake: Prefer cast to void over odd && usage]
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
nbd/server.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/nbd/server.c b/nbd/server.c
index d145e1a690..613ed2634a 100644
--- a/nbd/server.c
+++ b/nbd/server.c
@@ -2129,8 +2129,8 @@ static void bitmap_to_extents(BdrvDirtyBitmap *bitmap,
}
if (!full) {
- /* last non dirty extent */
- nbd_extent_array_add(es, end - start, 0);
+ /* last non dirty extent, nothing to do if array is now full */
+ (void) nbd_extent_array_add(es, end - start, 0);
}
bdrv_dirty_bitmap_unlock(bitmap);