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authorTony Battersby <tonyb@cybernetics.com>2009-01-08 20:54:45 +0300
committerJames Bottomley <James.Bottomley@HansenPartnership.com>2009-03-12 20:58:16 +0300
commitb409063a9b7a56c0d658feaffedeb74ad71edce7 (patch)
tree9cce185196e88f961e1cf5c24253ae84098b8822 /drivers/scsi/sym53c8xx_2
parent07b9d81e849f64b990e943de6ad75b63dafe5a4b (diff)
downloadlinux-b409063a9b7a56c0d658feaffedeb74ad71edce7.tar.xz
[SCSI] sym53c8xx: fix bogus free_irq() on error path
If sym_attach() gets an error at or before request_irq(), then sym_free_resources() will call free_irq() for an unregistered interrupt handler. Signed-off-by: Tony Battersby <tonyb@cybernetics.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Diffstat (limited to 'drivers/scsi/sym53c8xx_2')
-rw-r--r--drivers/scsi/sym53c8xx_2/sym_glue.c11
1 files changed, 7 insertions, 4 deletions
diff --git a/drivers/scsi/sym53c8xx_2/sym_glue.c b/drivers/scsi/sym53c8xx_2/sym_glue.c
index cef03e768367..a8ac60caadc0 100644
--- a/drivers/scsi/sym53c8xx_2/sym_glue.c
+++ b/drivers/scsi/sym53c8xx_2/sym_glue.c
@@ -1238,12 +1238,13 @@ static int sym53c8xx_proc_info(struct Scsi_Host *shost, char *buffer,
/*
* Free controller resources.
*/
-static void sym_free_resources(struct sym_hcb *np, struct pci_dev *pdev)
+static void sym_free_resources(struct sym_hcb *np, struct pci_dev *pdev,
+ int do_free_irq)
{
/*
* Free O/S specific resources.
*/
- if (pdev->irq)
+ if (do_free_irq)
free_irq(pdev->irq, np->s.host);
if (np->s.ioaddr)
pci_iounmap(pdev, np->s.ioaddr);
@@ -1275,6 +1276,7 @@ static struct Scsi_Host * __devinit sym_attach(struct scsi_host_template *tpnt,
struct pci_dev *pdev = dev->pdev;
unsigned long flags;
struct sym_fw *fw;
+ int do_free_irq = 0;
printk(KERN_INFO "sym%d: <%s> rev 0x%x at pci %s irq %u\n",
unit, dev->chip.name, pdev->revision, pci_name(pdev),
@@ -1364,6 +1366,7 @@ static struct Scsi_Host * __devinit sym_attach(struct scsi_host_template *tpnt,
sym_name(np), pdev->irq);
goto attach_failed;
}
+ do_free_irq = 1;
/*
* After SCSI devices have been opened, we cannot
@@ -1420,7 +1423,7 @@ static struct Scsi_Host * __devinit sym_attach(struct scsi_host_template *tpnt,
return NULL;
printf_info("sym%d: giving up ...\n", unit);
if (np)
- sym_free_resources(np, pdev);
+ sym_free_resources(np, pdev, do_free_irq);
scsi_host_put(shost);
return NULL;
@@ -1659,7 +1662,7 @@ static int sym_detach(struct Scsi_Host *shost, struct pci_dev *pdev)
udelay(10);
OUTB(np, nc_istat, 0);
- sym_free_resources(np, pdev);
+ sym_free_resources(np, pdev, 1);
scsi_host_put(shost);
return 1;