linux-kernel - [-mm patch] aic7xxx: check irq validity (was Re: 2.6.18-mm2)

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Message-ID: <20060930140946.GA1195@slug>
Date:	Sat, 30 Sep 2006 14:09:46 +0000
From:	Frederik Deweerdt <deweerdt@...e.fr>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	Matthew Wilcox <matthew@....cx>,
	"J.A. Magall??n" <jamagallon@....com>,
	Andrew Morton <akpm@...l.org>,
	"Linux-Kernel," <linux-kernel@...r.kernel.org>,
	linux-scsi@...r.kernel.org
Subject: [-mm patch] aic7xxx: check irq validity (was Re: 2.6.18-mm2)

On Sat, Sep 30, 2006 at 12:43:24AM +0100, Alan Cox wrote:
> Ar Gwe, 2006-09-29 am 23:50 +0000, ysgrifennodd Frederik Deweerdt:
> > Does this patch makes sense in that case? If yes, I'll put up a patch
> > for the remaining cases in the drivers/scsi/aic7xxx/ directory.
> > Also, aic7xxx's coding style would put parenthesis around the returned
> > value, should I follow it?
> 
> Yes - but perhaps with a warning message so users know why ?
> 
> As to coding style - kernel style is unbracketed so I wouldnt worry
> about either.
> 
Thanks for the advices. 

The following patch checks whenever the irq is valid before issuing a
request_irq() for AIC7XXX and AIC79XX. An error message is displayed to
let the user know what went wrong.

Regards,
Frederik

Signed-off-by: Frederik Deweerdt <frederik.deweerdt@...il.com>

diff --git a/drivers/scsi/aic7xxx/aic79xx_osm_pci.c b/drivers/scsi/aic7xxx/aic79xx_osm_pci.c
index 2001fe8..8279122 100644
--- a/drivers/scsi/aic7xxx/aic79xx_osm_pci.c
+++ b/drivers/scsi/aic7xxx/aic79xx_osm_pci.c
@@ -132,6 +132,11 @@ ahd_linux_pci_dev_probe(struct pci_dev *
 	char		*name;
 	int		 error;
 
+	if (!pdev->irq) {
+		printk(KERN_WARNING "aic79xx: No irq line set\n");
+		return -ENODEV;
+	}
+
 	pci = pdev;
 	entry = ahd_find_pci_device(pci);
 	if (entry == NULL)
diff --git a/drivers/scsi/aic7xxx/aic7xxx_osm_pci.c b/drivers/scsi/aic7xxx/aic7xxx_osm_pci.c
index ea5687d..ca61cdb 100644
--- a/drivers/scsi/aic7xxx/aic7xxx_osm_pci.c
+++ b/drivers/scsi/aic7xxx/aic7xxx_osm_pci.c
@@ -185,6 +185,11 @@ ahc_linux_pci_dev_probe(struct pci_dev *
 	int		 error;
 	struct device	*dev = &pdev->dev;
 
+	if (!pdev->irq) {
+		printk(KERN_WARNING "aic7xxx: No irq line set\n");
+		return -ENODEV;
+	}
+
 	pci = pdev;
 	entry = ahc_find_pci_device(pci);
 	if (entry == NULL)
-
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