On Wed, May 04, 2011 at 11:39:20AM +0200, Manohar Vanga wrote:
> Hi,
>
> I have written a simulated driver for a PCI board and am looking for a clean
> way to use the driver. Currently, I am setting the PCI ids to PCI_ANY_ID and
> only allowing a single probe call to go through using a global variable
> (concurrency issues but I don't care for the simulation).
>
> static int n
> ...
> static int fake_board_probe(struct pci_dev *pdev, const struct pci_device_id
> *ent)
> {
> if (n == 1)
> return -1;
Please return a proper error value, like -ENODEV.
> n = 1;
> ...
> }
> static int fake_board_init(void)
> {
> n = 0;
> ....
> }
>
> I want to do a cleaner job of this and wanted to write a PCI bridge driver that
> actually registers the devices with the correct IDs that I need. This also
> gives me the advantage of being able to register multiple devices which is a
> useful for the simulation I am working on.
> Can anyone point me in the right direction for this? Most of the code (eg.
> struct pci_controller) seem to be architecture specific.
Just register your device, and then don't use any global variables to
the driver. Put them all in your struct pci_dev private area and you
will be fine.
There's thousands of examples of this in the kernel.
hope this helps,
greg k-h
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