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Subject[PATCH net-next] net: dsa: check master device before put
Date
In the case of pdata, the dsa_cpu_parse function calls dev_put() before
making sure it isn't NULL. Fix this.

Fixes: 71e0bbde0d88 ("net: dsa: Add support for platform data")
Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
---
net/dsa/dsa2.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/net/dsa/dsa2.c b/net/dsa/dsa2.c
index 9e8b8aab049d..908c06e32520 100644
--- a/net/dsa/dsa2.c
+++ b/net/dsa/dsa2.c
@@ -489,14 +489,15 @@ static int dsa_cpu_parse(struct dsa_port *port, u32 index,
if (!ethernet)
return -EINVAL;
ethernet_dev = of_find_net_device_by_node(ethernet);
+ if (!ethernet_dev)
+ return -EPROBE_DEFER;
} else {
ethernet_dev = dsa_dev_to_net_device(ds->cd->netdev[index]);
+ if (!ethernet_dev)
+ return -EPROBE_DEFER;
dev_put(ethernet_dev);
}

- if (!ethernet_dev)
- return -EPROBE_DEFER;
-
if (!dst->cpu_dp) {
dst->cpu_dp = port;
dst->cpu_dp->master = ethernet_dev;
--
2.14.2
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