devlink: remove a dubious assumption in fmsg dumping

Build bot detects that err may be returned uninitialized in
devlink_fmsg_prepare_skb(). This is not really true because
all fmsgs users should create at least one outer nest, and
therefore fmsg can't be completely empty.

That said the assumption is not trivial to confirm, so let's
follow the bots advice, anyway.

This code does not seem to have changed since its inception in
commit 1db64e8733f6 ("devlink: Add devlink formatted message (fmsg) API")

Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Link: https://lore.kernel.org/r/20230124035231.787381-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/net/devlink/leftover.c b/net/devlink/leftover.c
index 8eab95cae917f5c5c7018f6602afb4863947d065..74621287f4e5bc2ca0d602c34536fe93f7adefb9 100644 (file)
--- a/net/devlink/leftover.c
+++ b/net/devlink/leftover.c
@@ -7116,8 +7116,8 @@ devlink_fmsg_prepare_skb(struct devlink_fmsg *fmsg, struct sk_buff *skb,
 {
        struct devlink_fmsg_item *item;
        struct nlattr *fmsg_nlattr;
+       int err = 0;
        int i = 0;
-       int err;
 
        fmsg_nlattr = nla_nest_start_noflag(skb, DEVLINK_ATTR_FMSG);
        if (!fmsg_nlattr)