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Date: Thu, 18 Jun 2009 14:43:56 -0300
From: Herton Ronaldo Krzesinski <herton@...driva.com.br>
To: Ian Abbott <abbotti@....co.uk>
Cc: "fmhess@...rs.sourceforge.net" <fmhess@...rs.sourceforge.net>,
Ian Abbott <ian.abbott@....co.uk>, Greg KH <gregkh@...e.de>,
LKML <linux-kernel@...r.kernel.org>,
Gianluca Palli <gpalli@...s.unibo.it>,
David Schleef <ds@...leef.org>
Subject: Re: staging driver s626 clashes with philips SAA7146 media/dvb based cards
Em Quinta-feira 18 Junho 2009, às 14:32:31, Ian Abbott escreveu:
> On 18/06/09 18:23, Herton Ronaldo Krzesinski wrote:
> > Let me know if there is any problem remaining with this version:
> >
> > Staging: comedi: s626: use subvendor:subdevice ids for SAA7146 board
> >
> > 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@...driva.com.br>
> >
> > diff --git a/drivers/staging/comedi/drivers/s626.c b/drivers/staging/comedi/drivers/s626.c
> > index 30dec9d..4210590 100644
> > --- a/drivers/staging/comedi/drivers/s626.c
> > +++ b/drivers/staging/comedi/drivers/s626.c
> > @@ -110,9 +110,13 @@ 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}
> > };
> >
> > @@ -498,25 +502,26 @@ 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) && !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;
>
> The outer for loop iterates once too often - it doesn't need to iterate
> over the sentinel at the end of the id table as that shouldn't match any
> PCI device.
Ouch, yep didn't saw that, new version:
Staging: comedi: s626: use subvendor:subdevice ids for SAA7146 board
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@...driva.com.br>
diff --git a/drivers/staging/comedi/drivers/s626.c b/drivers/staging/comedi/drivers/s626.c
index 30dec9d..7bf2a79 100644
--- a/drivers/staging/comedi/drivers/s626.c
+++ b/drivers/staging/comedi/drivers/s626.c
@@ -110,9 +110,13 @@ 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}
};
@@ -498,25 +502,26 @@ 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;
--
[]'s
Herton
--
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