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Staging: comedi: jr3_pci: Don't ioremap too much space. Check result.

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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>
This commit is contained in:
Ian Abbott 2009-11-30 10:59:27 +00:00 committed by Greg Kroah-Hartman
parent d103bef451
commit fa5c5f4ce0
1 changed files with 5 additions and 2 deletions
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7
drivers/staging/comedi/drivers/jr3_pci.c
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@ -849,8 +849,11 @@ 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;