pata_platform: Fix NULL pointer dereference

pata_platform: Fix NULL pointer dereference

pata_platform currently dereferences a NULL pointer in pata_platform_probe()
if pdev->dev.platform_data is set to NULL. This breakage was most likely
introduced by commit 5f45bc50976ee1f408f7171af155aec646655a37.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/ata/pata_platform.c b/drivers/ata/pata_platform.c
index 79f841bca593..a909f793ffc1 100644
--- a/drivers/ata/pata_platform.c
+++ b/drivers/ata/pata_platform.c
@@ -213,8 +213,9 @@ static int __devinit pata_platform_probe(struct platform_device *pdev)
         pata_platform_setup_port(&ap->ioaddr, pp_info);
 
         /* activate */
-        return ata_host_activate(host, platform_get_irq(pdev, 0), ata_interrupt,
-                                 pp_info->irq_flags, &pata_platform_sht);
+        return ata_host_activate(host, platform_get_irq(pdev, 0),
+                                 ata_interrupt, pp_info ? pp_info->irq_flags
+                                 : 0, &pata_platform_sht);
 }
 
 /**