[SCSI] aacraid: Check scsi_bios_ptabe return code

Received from Mark Salyzyn.

scsi_bios_ptable return value is not being checked in aac_biosparm.

Signed-off-by: Mark Haverkamp <markh@osdl.org>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/scsi/aacraid/linit.c b/drivers/scsi/aacraid/linit.c
index ab383d1f59e2..3cb68af90456 100644
--- a/drivers/scsi/aacraid/linit.c
+++ b/drivers/scsi/aacraid/linit.c
@@ -325,6 +325,8 @@ static int aac_biosparm(struct scsi_device *sdev, struct block_device *bdev,
          *      translations ( 64/32, 128/32, 255/63 ).
          */
         buf = scsi_bios_ptable(bdev);
+        if (!buf)
+                return 0;
         if(*(__le16 *)(buf + 0x40) == cpu_to_le16(0xaa55)) {
                 struct partition *first = (struct partition * )buf;
                 struct partition *entry = first;