Messages in this thread | | | Date | Wed, 15 Sep 1999 13:11:12 -0400 | From | Jeff Garzik <> | Subject | Re: PCI probing |
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Bret Indrelee wrote: > My copy of pci_find_device() from RedHat 6.0 (2.2.5 kernel) doesn't have > code for PCI_DEV_ANY.
PCI_ANY_ID first appeared in 2.3.x. If this interface were to be used under older kernels, manual support of the PCI_ANY_ID semantics in pci_simple_probe() would be needed.
> Since it is table driven, you may want to add an entry for matching by class > as well.
For the case of pci_simple_probe() I would like to keep it as small as possible, hopefully only covering the most common cases. Are there many cases where knowing the class _and_ the device ids is more valuable than knowing only the device ids?
> What is the value of passing in an array of table entries? I would think the > normal case is for a driver to only search for one device type.
In my experience one chip may appear on several different boards, so having a table is very helpful. If you have a single device id, it would probably be better to call pci_find_xxx() directly.
Thanks for the comments.
Regards,
Jeff
-- Custom driver development | Never worry about theory as long Open source programming | as the machinery does what it's | supposed to do. -- R. A. Heinlein
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