[PATCH] ata: fix platform_device_register_simple() error check

[Akinobu Mita <akinobu.mita@gmail.com>]

The return value of platform_device_register_simple() should be checked
by IS_ERR().

Cc: Jeff Garzik <jgarzik@pobox.com>
Cc: Alan <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>

---
 drivers/ata/pata_legacy.c  |    4 +++-
 drivers/ata/pata_qdi.c     |    4 ++--
 drivers/ata/pata_winbond.c |    4 ++--
 3 files changed, 7 insertions(+), 5 deletions(-)

Index: work-fault-inject/drivers/ata/pata_legacy.c
===================================================================
--- work-fault-inject.orig/drivers/ata/pata_legacy.c
+++ work-fault-inject/drivers/ata/pata_legacy.c
@@ -698,8 +698,10 @@ static __init int legacy_init_one(int po
 		goto fail_io;
 
 	pdev = platform_device_register_simple(DRV_NAME, nr_legacy_host, NULL, 0);
-	if (pdev == NULL)
+	if (IS_ERR(pdev)) {
+		ret = PTR_ERR(pdev);
 		goto fail_dev;
+	}
 
 	if (ht6560a & mask) {
 		ops = &ht6560a_port_ops;
Index: work-fault-inject/drivers/ata/pata_qdi.c
===================================================================
--- work-fault-inject.orig/drivers/ata/pata_qdi.c
+++ work-fault-inject/drivers/ata/pata_qdi.c
@@ -247,8 +247,8 @@ static __init int qdi_init_one(unsigned 
 	 */
 
 	pdev = platform_device_register_simple(DRV_NAME, nr_qdi_host, NULL, 0);
-	if (pdev == NULL)
-		return -ENOMEM;
+	if (IS_ERR(pdev))
+		return PTR_ERR(pdev);
 
 	memset(&ae, 0, sizeof(struct ata_probe_ent));
 	INIT_LIST_HEAD(&ae.node);
Index: work-fault-inject/drivers/ata/pata_winbond.c
===================================================================
--- work-fault-inject.orig/drivers/ata/pata_winbond.c
+++ work-fault-inject/drivers/ata/pata_winbond.c
@@ -206,8 +206,8 @@ static __init int winbond_init_one(unsig
 			 */
 
 			pdev = platform_device_register_simple(DRV_NAME, nr_winbond_host, NULL, 0);
-			if (pdev == NULL)
-				return -ENOMEM;
+			if (IS_ERR(pdev))
+				return PTR_ERR(pdev);
 
 			memset(&ae, 0, sizeof(struct ata_probe_ent));
 			INIT_LIST_HEAD(&ae.node);