drivers: net: smc911x: Check for error irq

[ Upstream commit cb93b3e11d405f20a405a07482d01147ef4934a3 ]

Because platform_get_irq() could fail and return error irq.
Therefore, it might be better to check it if order to avoid the use of
error irq.

Fixes: ae150435b59e ("smsc: Move the SMC (SMSC) drivers")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/ethernet/smsc/smc911x.c b/drivers/net/ethernet/smsc/smc911x.c
index d0cf971aa4ebe7233e550350100746281c7e1533..4237bd311e0e626a1a5293267ddf3550425ca63a 100644 (file)
--- a/drivers/net/ethernet/smsc/smc911x.c
+++ b/drivers/net/ethernet/smsc/smc911x.c
@@ -2088,6 +2088,11 @@ static int smc911x_drv_probe(struct platform_device *pdev)
 
        ndev->dma = (unsigned char)-1;
        ndev->irq = platform_get_irq(pdev, 0);
+       if (ndev->irq < 0) {
+               ret = ndev->irq;
+               goto release_both;
+       }
+
        lp = netdev_priv(ndev);
        lp->netdev = ndev;
 #ifdef SMC_DYNAMIC_BUS_CONFIG