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[ovs-dev,V3,16/24] datapath: drop unneeded BUG_ON() in ovs_flow_cmd_build_info()

Message ID 20200916173311.30956-17-gvrose8192@gmail.com
State New
Headers show
Series Add support for Linux kernels up to 5.8.x | expand

Commit Message

Gregory Rose Sept. 16, 2020, 5:33 p.m. UTC
From: Paolo Abeni <pabeni@redhat.com>

Upstream commit:
    commit 8ffeb03fbba3b599690b361467bfd2373e8c450f
    Author: Paolo Abeni <pabeni@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

    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@redhat.com>
    Signed-off-by: David S. Miller <davem@davemloft.net>

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