HSI: ssi_protocol: fix potential resource leak in ssip_pn_open()

[ Upstream commit b28dbcb ]

ssip_pn_open() claims the HSI client's port with hsi_claim_port(). When
hsi_register_port_event() gets some error and returns a negetive value,
the HSI client's port should be released with hsi_release_port().

Fix it by calling hsi_release_port() when hsi_register_port_event() fails.

Signed-off-by: Jianglei Nie <[email protected]>
Signed-off-by: Sebastian Reichel <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>

drivers/hsi/clients/ssi_protocol.c

@@ -931,6 +931,7 @@ static int ssip_pn_open(struct net_device *dev)
 	if (err < 0) {
 		dev_err(&cl->device, "Register HSI port event failed (%d)\n",
 			err);
+		hsi_release_port(cl);
 		return err;
 	}
 	dev_dbg(&cl->device, "Configuring SSI port\n");