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Staging: comedi: s626: use subvendor:subdevice ids for SAA7146 board

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The current s626 comedi driver in staging conflicts with philips SAA7146
media/dvb based cards, because it claims the same vendor:device pci id
for all subdevice/subvendor ids. What happens is that for people that have a
philips SAA7146 media/dvb based card, s626 if available gets loaded by udev
and makes system freeze (https://qa.mandriva.com/show_bug.cgi?id=51445).

The s626 driver shouldn't claim all 1131:7146 devices. Fix this by
specifying specific known subvendor:subdevice ids in its pci id table
list.

Also s626_attach is modified to use now pci_get_subsys instead of
pci_get_device as reported by Ian Abbott, and now we loop over pci id
table entries in case more ids are added in the future.

Reference: http://lkml.org/lkml/2009/6/16/552

Signed-off-by: Herton Ronaldo Krzesinski <herton@mandriva.com.br>
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Herton Ronaldo Krzesinski 2009-06-18 14:43:56 -03:00 committed by Greg Kroah-Hartman
parent 91fca6da38
commit 8231eb5672
1 changed files with 20 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

35
drivers/staging/comedi/drivers/s626.c
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@ -111,9 +111,13 @@ static const struct s626_board s626_boards[] = {
#define PCI_VENDOR_ID_S626 0x1131
#define PCI_DEVICE_ID_S626 0x7146
/*
* For devices with vendor:device id == 0x1131:0x7146 you must specify
* also subvendor:subdevice ids, because otherwise it will conflict with
* Philips SAA7146 media/dvb based cards.
*/
static DEFINE_PCI_DEVICE_TABLE(s626_pci_table) = {
{PCI_VENDOR_ID_S626, PCI_DEVICE_ID_S626, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
0},
{PCI_VENDOR_ID_S626, PCI_DEVICE_ID_S626, 0x6000, 0x0272, 0, 0, 0},
{0}
};
@ -499,25 +503,26 @@ static int s626_attach(struct comedi_device *dev, struct comedi_devconfig *it)
resource_size_t resourceStart;
dma_addr_t appdma;
struct comedi_subdevice *s;
struct pci_dev *pdev;
const struct pci_device_id *ids;
struct pci_dev *pdev = NULL;
if (alloc_private(dev, sizeof(struct s626_private)) < 0)
return -ENOMEM;
for (pdev = pci_get_device(PCI_VENDOR_ID_S626, PCI_DEVICE_ID_S626,
NULL); pdev != NULL;
pdev = pci_get_device(PCI_VENDOR_ID_S626,
PCI_DEVICE_ID_S626, pdev)) {
if (it->options[0] || it->options[1]) {
if (pdev->bus->number == it->options[0] &&
PCI_SLOT(pdev->devfn) == it->options[1]) {
for (i = 0; i < (ARRAY_SIZE(s626_pci_table) - 1) && !pdev; i++) {
ids = &s626_pci_table[i];
do {
pdev = pci_get_subsys(ids->vendor, ids->device, ids->subvendor,
ids->subdevice, pdev);
if ((it->options[0] || it->options[1]) && pdev) {
/* matches requested bus/slot */
if (pdev->bus->number == it->options[0] &&
PCI_SLOT(pdev->devfn) == it->options[1])
break;
} else
break;
}
} else {
/* no bus/slot specified */
break;
}
} while (1);
}
devpriv->pdev = pdev;