Commit 8abde9ac authored Mar 08, 2017 by Ian Abbott Committed by Greg Kroah-Hartman Mar 12, 2017

staging: comedi: jr3_pci: check PCI BAR 0 size

The various supported boards have different numbers of subdevices from 1
to 4. Each subdevice needs a block of registers in PCI BAR 0. Check
the region is large enough for the required number of subdevices.
Return an error from `jr3_pci_auto_attach()` if it is too small.

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 7cb1c5c2

drivers/staging/comedi/drivers/jr3_pci.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -705,6 +705,9 @@ static int jr3_pci_auto_attach(struct comedi_device *dev,
		if (ret)
		return ret;

		if (pci_resource_len(pcidev, 0) < board->n_subdevs * sizeof(*block))
		return -ENXIO;

		dev->mmio = pci_ioremap_bar(pcidev, 0);
		if (!dev->mmio)
		return -ENOMEM;