[ovs-dev] [PATCH v2 16/24] datapath: drop unneeded BUG_ON() in ovs_flow_cmd_build_info()

Greg Rose gvrose8192 at gmail.com
Wed Sep 9 19:20:13 UTC 2020


From: Paolo Abeni <pabeni at redhat.com>

Upstream commit:
    commit 8ffeb03fbba3b599690b361467bfd2373e8c450f
    Author: Paolo Abeni <pabeni at redhat.com>
    Date:   Sun Dec 1 18:41:24 2019 +0100

    openvswitch: drop unneeded BUG_ON() in ovs_flow_cmd_build_info()

    All the callers of ovs_flow_cmd_build_info() already deal with
    error return code correctly, so we can handle the error condition
    in a more gracefull way. Still dump a warning to preserve
    debuggability.

    v1 -> v2:
     - clarify the commit message
     - clean the skb and report the error (DaveM)

    Fixes: ccb1352e76cf ("net: Add Open vSwitch kernel components.")
    Signed-off-by: Paolo Abeni <pabeni at redhat.com>
    Signed-off-by: David S. Miller <davem at davemloft.net>

Cc: Paolo Abeni <pabeni at redhat.com>
Signed-off-by: Greg Rose <gvrose8192 at gmail.com>
---
 datapath/datapath.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/datapath/datapath.c b/datapath/datapath.c
index 047b3312e..877c8bdba 100644
--- a/datapath/datapath.c
+++ b/datapath/datapath.c
@@ -946,7 +946,10 @@ static struct sk_buff *ovs_flow_cmd_build_info(const struct sw_flow *flow,
 	retval = ovs_flow_cmd_fill_info(flow, dp_ifindex, skb,
 					info->snd_portid, info->snd_seq, 0,
 					cmd, ufid_flags);
-	BUG_ON(retval < 0);
+	if (WARN_ON_ONCE(retval < 0)) {
+		kfree_skb(skb);
+		skb = ERR_PTR(retval);
+	}
 	return skb;
 }
 
-- 
2.17.1



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