diff --git a/drivers/char/cs5535_gpio.c b/drivers/char/cs5535_gpio.c
index c2d23ca..c0a4a0b 100644
--- a/drivers/char/cs5535_gpio.c
+++ b/drivers/char/cs5535_gpio.c
@@ -215,7 +215,7 @@
 	else
 		mask = 0x0b003c66;
 
-	if (request_region(gpio_base, CS5535_GPIO_SIZE, NAME) == 0) {
+	if (!request_region(gpio_base, CS5535_GPIO_SIZE, NAME)) {
 		printk(KERN_ERR NAME ": can't allocate I/O for GPIO\n");
 		return -ENODEV;
 	}
diff --git a/drivers/char/n_hdlc.c b/drivers/char/n_hdlc.c
index 82bcfb9..06803ed 100644
--- a/drivers/char/n_hdlc.c
+++ b/drivers/char/n_hdlc.c
@@ -501,7 +501,7 @@
 			__FILE__,__LINE__, count);
 		
 	/* This can happen if stuff comes in on the backup tty */
-	if (n_hdlc == 0 || tty != n_hdlc->tty)
+	if (!n_hdlc || tty != n_hdlc->tty)
 		return;
 		
 	/* verify line is using HDLC discipline */
diff --git a/drivers/char/rio/rioroute.c b/drivers/char/rio/rioroute.c
index 85091ff74..7a9df7d 100644
--- a/drivers/char/rio/rioroute.c
+++ b/drivers/char/rio/rioroute.c
@@ -526,7 +526,7 @@
 			 ** If RTA is not powered on, the tx packets will be
 			 ** unset, so go no further.
 			 */
-			if (PortP->TxStart == 0) {
+			if (!PortP->TxStart) {
 				rio_dprintk(RIO_DEBUG_ROUTE, "Tx pkts not set up yet\n");
 				rio_spin_unlock_irqrestore(&PortP->portSem, flags);
 				break;
diff --git a/drivers/firmware/iscsi_ibft_find.c b/drivers/firmware/iscsi_ibft_find.c
index d0e5fa4..11f1744 100644
--- a/drivers/firmware/iscsi_ibft_find.c
+++ b/drivers/firmware/iscsi_ibft_find.c
@@ -58,7 +58,7 @@
 	unsigned int len = 0;
 	void *virt;
 
-	ibft_addr = 0;
+	ibft_addr = NULL;
 
 	for (pos = IBFT_START; pos < IBFT_END; pos += 16) {
 		/* The table can't be inside the VGA BIOS reserved space,
diff --git a/drivers/mtd/maps/plat-ram.c b/drivers/mtd/maps/plat-ram.c
index f0b10ca..3eb2643 100644
--- a/drivers/mtd/maps/plat-ram.c
+++ b/drivers/mtd/maps/plat-ram.c
@@ -209,7 +209,7 @@
 	/* probe for the right mtd map driver
 	 * supplied by the platform_data struct */
 
-	if (pdata->map_probes != 0) {
+	if (pdata->map_probes) {
 		const char **map_probes = pdata->map_probes;
 
 		for ( ; !info->mtd && *map_probes; map_probes++)
diff --git a/drivers/pci/pcie/aer/aerdrv_acpi.c b/drivers/pci/pcie/aer/aerdrv_acpi.c
index 96ac540..d39a78d 100644
--- a/drivers/pci/pcie/aer/aerdrv_acpi.c
+++ b/drivers/pci/pcie/aer/aerdrv_acpi.c
@@ -31,7 +31,7 @@
 {
 	acpi_status status = AE_NOT_FOUND;
 	struct pci_dev *pdev = pciedev->port;
-	acpi_handle handle = 0;
+	acpi_handle handle = NULL;
 
 	if (acpi_pci_disabled)
 		return -1;