From: Tejun Heo <htejun@gmail.com>
Date: Sat, 11 Mar 2006 03:47:54 +0000 (+0900)
Subject: [PATCH] ahci: fix NULL pointer dereference detected by Coverity
X-Git-Tag: v2.6.16~56^2~1
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6971ed1fbbc80cae54e082aae153d5b063885d0a;p=linux-2.6

[PATCH] ahci: fix NULL pointer dereference detected by Coverity

Fix NULL pointer dereference detected by the Coverity checker.  Kill
dev -> pdev -> dev conversion while at it.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Cc: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---

diff --git a/drivers/scsi/ahci.c b/drivers/scsi/ahci.c
index a800fb5116..559ff7aae3 100644
--- a/drivers/scsi/ahci.c
+++ b/drivers/scsi/ahci.c
@@ -742,23 +742,17 @@ static irqreturn_t ahci_interrupt (int irq, void *dev_instance, struct pt_regs *
 			struct ata_queued_cmd *qc;
 			qc = ata_qc_from_tag(ap, ap->active_tag);
 			if (!ahci_host_intr(ap, qc))
-				if (ata_ratelimit()) {
-					struct pci_dev *pdev =
-						to_pci_dev(ap->host_set->dev);
-					dev_printk(KERN_WARNING, &pdev->dev,
+				if (ata_ratelimit())
+					dev_printk(KERN_WARNING, host_set->dev,
 					  "unhandled interrupt on port %u\n",
 					  i);
-				}
 
 			VPRINTK("port %u\n", i);
 		} else {
 			VPRINTK("port %u (no irq)\n", i);
-			if (ata_ratelimit()) {
-				struct pci_dev *pdev =
-					to_pci_dev(ap->host_set->dev);
-				dev_printk(KERN_WARNING, &pdev->dev,
+			if (ata_ratelimit())
+				dev_printk(KERN_WARNING, host_set->dev,
 					"interrupt on disabled port %u\n", i);
-			}
 		}
 
 		irq_ack |= (1 << i);