[PATCH] 3c507.c: remove unused NULL pointer check

Alexander Strakh
2009-12-21T15:18:52Z

In driver drivers/net/3c507.c in function Iirqreturn_t el16_interrupt:
1. If in line 555 dev = NULL then we goto line 556
2. In line 556 we have null dereference because pr_err called with dev->name
in third parameter.
555 if (dev == NULL) {
556 pr_err("%s: net_interrupt(): irq %d for unknown device.
\n",
557 dev->name, irq);
558 return IRQ_NONE;
559 }

Found by Linux Device Drivers Verification (Svace detector)

Remove unused NULL pointer check.

Signed-off-by: Alexander Strakh <strakh@ispras.ru>

---
diff --git a/./0000/drivers/net/3c507.c b/./moder/drivers/net/3c507.c
index fbc2311..3bfb3dd 100644
--- a/./0000/drivers/net/3c507.c
+++ b/./moder/drivers/net/3c507.c
@@ -552,12 +552,6 @@ static irqreturn_t el16_interrupt(int irq, void *dev_id)
ushort ack_cmd = 0;
void __iomem *shmem;

- if (dev == NULL) {
- pr_err("%s: net_interrupt(): irq %d for unknown device.\n",
- dev->name, irq);
- return IRQ_NONE;
- }
-
ioaddr = dev->base_addr;
lp = netdev_priv(dev);
shmem = lp->base;