[PATCH] ax25: Add missing dev_put in ax25_setsockopt

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There is no dev_put ending positive SO_BINDTODEVICE call in
ax25_setsockopt and no matching dev_put later. This ref isn't used by
ax25_cb's because it's handled with up and down device events.

BTW of reported-by: Bernard Pidoux F6BVP <f6bvp@xxxxxxx>

Signed-off-by: Jarek Poplawski <jarkao2@xxxxxxxxx>

 net/ax25/af_ax25.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/net/ax25/af_ax25.c b/net/ax25/af_ax25.c
index fbcac76..3eee8eb 100644
--- a/net/ax25/af_ax25.c
+++ b/net/ax25/af_ax25.c
@@ -663,6 +663,7 @@ static int ax25_setsockopt(struct socket *sock, int level, int optname,
 		ax25->ax25_dev = ax25_dev_ax25dev(dev);
 		ax25_fillin_cb(ax25, ax25->ax25_dev);
+		dev_put(dev);
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