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parport_pc: release IO region properly if unsupported ITE887x card is found 

sio_ite_8872_probe() bails out if it detects no-parallel (1S, 2S) or
unknown card.

It doesn't call release_region() on the previously allocated resource
though.  This causes

  (a) leak of the resource
  (b) kernel oops when parport module is removed and /proc/ioports is read. This
      is because the string that has been associated to the IO port region
      is a static char array inside the already removed module.

Let's call release_region() properly before baling out.

Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Acked-by: Niels de Vos <ndevos@redhat.com>
Cc: Bjorn Helgaas <bjorn.helgaas@hp.com>
Cc: Alan Cox <alan@linux.intel.com>
Cc: Joe Krahn <krahn@niehs.nih.gov>
Signed-off-by: Andrew Morton <akpm@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Jiri Kosina 2011-10-06 14:29:48 -07:00 committed by Greg Kroah-Hartman
parent 8193c42906
commit 9fdbdd062b
1 changed files with 3 additions and 0 deletions
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3
drivers/parport/parport_pc.c
View File

@ -2595,14 +2595,17 @@ static int __devinit sio_ite_8872_probe(struct pci_dev *pdev, int autoirq,
break;
case 0x6:
printk(KERN_INFO "parport_pc: ITE8873 found (1S)\n");
release_region(inta_addr[i], 32);
return 0;
case 0x8:
printk(KERN_INFO "parport_pc: ITE8874 found (2S)\n");
release_region(inta_addr[i], 32);
return 0;
default:
printk(KERN_INFO "parport_pc: unknown ITE887x\n");
printk(KERN_INFO "parport_pc: please mail 'lspci -nvv' "
"output to Rich.Liu@ite.com.tw\n");
release_region(inta_addr[i], 32);
return 0;
}