pata_platform: Fix NULL pointer dereference

[Magnus Damm <magnus.damm@gmail.com>]

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>
---

 Tested on a Solution Engline 7722 board, fixes NULL dereference problem.
 Applies to linux-2.6 git 9a79b2274186fade17134929d4f85b70d59a3840
 Could someone please make sure this gets included in rc1?

 drivers/ata/pata_platform.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

--- 0001/drivers/ata/pata_platform.c
+++ work/drivers/ata/pata_platform.c	2007-07-20 12:09:04.000000000 +0900
@@ -213,8 +213,9 @@ static int __devinit pata_platform_probe
 	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);
 }
 
 /**