[PATCH] nl80211: Reset split_start on error path when split dump is not used

[Pontus Fuchs <pontus.fuchs@gmail.com>]

When the netlink skb is exhausted split_start is left set. In the
subsequent retry, with a larger buffer, the dump is continued from the
failing point instead of from the beginning.

This was causing my rt28xx based USB dongle to now show up when
running "iw list" with an old iw version without split dump support.

Signed-off-by: Pontus Fuchs <pontus.fuchs@gmail.com>
---
 net/wireless/nl80211.c | 2 ++
 1 file changed, 2 insertions(+)

Supersedes "nl80211: Don't touch split_start when split dump is not used"

diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index d0afd82..ba6d438 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -1631,6 +1631,8 @@ static int nl80211_send_wiphy(struct cfg80211_registered_device *dev,
 	return genlmsg_end(msg, hdr);
 
  nla_put_failure:
+	if (!state->split)
+		state->split_start = 0;
 	genlmsg_cancel(msg, hdr);
 	return -EMSGSIZE;
 }
-- 
1.8.3.2