Process the result of hold_open() and return it from
uhdlc_open() in case of an error
It is necessary to pass the error code up the control flow,
similar to a possible error in request_irq()

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Fixes: c19b6d246a35 ("drivers/net: support hdlc function for QE-UCC")
Signed-off-by: Alexandra Diupina <redacted>
---
v3: Fix the commits tree
v2: Remove the 'rc' variable (stores the return value of the 
hdlc_open()) as Christophe Leroy [off-list ref] suggested
 drivers/net/wan/fsl_ucc_hdlc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/wan/fsl_ucc_hdlc.c b/drivers/net/wan/fsl_ucc_hdlc.c
index 47c2ad7a3e42..4164abea7725 100644
--- a/drivers/net/wan/fsl_ucc_hdlc.c
+++ b/drivers/net/wan/fsl_ucc_hdlc.c

@@ -731,7 +731,7 @@ static int uhdlc_open(struct net_device *dev)
 		napi_enable(&priv->napi);
 		netdev_reset_queue(dev);
 		netif_start_queue(dev);
-		hdlc_open(dev);
+		return hdlc_open(dev);