more trivial signedness fixes in drivers

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/net/tulip/tulip_core.c b/drivers/net/tulip/tulip_core.c
index ee08292..e5e2c9c 100644
--- a/drivers/net/tulip/tulip_core.c
+++ b/drivers/net/tulip/tulip_core.c
@@ -292,6 +292,7 @@
 	struct tulip_private *tp = netdev_priv(dev);
 	void __iomem *ioaddr = tp->base_addr;
 	int next_tick = 3*HZ;
+	u32 reg;
 	int i;
 
 #ifdef CONFIG_TULIP_NAPI
@@ -307,14 +308,14 @@
 
 	/* Reset the chip, holding bit 0 set at least 50 PCI cycles. */
 	iowrite32(0x00000001, ioaddr + CSR0);
-	pci_read_config_dword(tp->pdev, PCI_COMMAND, &i);  /* flush write */
+	pci_read_config_dword(tp->pdev, PCI_COMMAND, &reg);  /* flush write */
 	udelay(100);
 
 	/* Deassert reset.
 	   Wait the specified 50 PCI cycles after a reset by initializing
 	   Tx and Rx queues and the address filter list. */
 	iowrite32(tp->csr0, ioaddr + CSR0);
-	pci_read_config_dword(tp->pdev, PCI_COMMAND, &i);  /* flush write */
+	pci_read_config_dword(tp->pdev, PCI_COMMAND, &reg);  /* flush write */
 	udelay(100);
 
 	if (tulip_debug > 1)