[PATCH 5.4 317/320] lib82596: Fix IRQ check in sni_82596_probe

Greg Kroah-Hartman
2022-01-24T20:33:32Z

From: Miaoqian Lin <linmq006@gmail.com>

commit 99218cbf81bf21355a3de61cd46a706d36e900e6 upstream.

platform_get_irq() returns negative error number instead 0 on failure.
And the doc of platform_get_irq() provides a usage example:

int irq = platform_get_irq(pdev, 0);
if (irq < 0)
return irq;

Fix the check of return value to catch errors correctly.

Fixes: 115978859272 ("i825xx: Move the Intel 82586/82593/82596 based drivers")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/net/ethernet/i825xx/sni_82596.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/net/ethernet/i825xx/sni_82596.c
+++ b/drivers/net/ethernet/i825xx/sni_82596.c
@@ -123,9 +123,10 @@ static int sni_82596_probe(struct platfo
netdevice->dev_addr[5] = readb(eth_addr + 0x06);
iounmap(eth_addr);

- if (!netdevice->irq) {
+ if (netdevice->irq < 0) {
printk(KERN_ERR "%s: IRQ not found for i82596 at 0x%lx\n",
__FILE__, netdevice->base_addr);
+ retval = netdevice->irq;
goto probe_failed;
}