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authorIan Abbott <abbotti@mev.co.uk>2009-11-30 10:59:27 +0000
committerGreg Kroah-Hartman <gregkh@suse.de>2011-03-14 14:29:59 -0700
commit102123644979069c61d694375991aa6793e4da57 (patch)
tree00d1fb40afbdfd1c05beb6d88a60d3532d6894a3 /drivers
parent649f25c389e9498923b459bbffff41a2fd1d7a64 (diff)
Staging: comedi: jr3_pci: Don't ioremap too much space. Check result.
commit fa5c5f4ce0c9ba03a670c640cad17e14cb35678b upstream. For the JR3/PCI cards, the size of the PCIBAR0 region depends on the number of channels. Don't try and ioremap space for 4 channels if the card has fewer channels. Also check for ioremap failure. Thanks to Anders Blomdell for input and Sami Hussein for testing. Signed-off-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/staging/comedi/drivers/jr3_pci.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/staging/comedi/drivers/jr3_pci.c b/drivers/staging/comedi/drivers/jr3_pci.c
index 59a61068f966..1d6385a52dcc 100644
--- a/drivers/staging/comedi/drivers/jr3_pci.c
+++ b/drivers/staging/comedi/drivers/jr3_pci.c
@@ -856,8 +856,11 @@ static int jr3_pci_attach(struct comedi_device *dev,
}
devpriv->pci_enabled = 1;
- devpriv->iobase =
- ioremap(pci_resource_start(card, 0), sizeof(struct jr3_t));
+ devpriv->iobase = ioremap(pci_resource_start(card, 0),
+ offsetof(struct jr3_t, channel[devpriv->n_channels]));
+ if (!devpriv->iobase)
+ return -ENOMEM;
+
result = alloc_subdevices(dev, devpriv->n_channels);
if (result < 0)
goto out;