pci_set_power_state() failure and breaking suspend

Stefan Richter stefanr at s5r6.in-berlin.de
Tue Oct 24 21:41:51 EST 2006

Benjamin Herrenschmidt wrote:
> Well, the question is wether we want to make the whole machine suspend
> fail because there is a 1394 chip that doesn't do PCI PM in or not...
> I can send patches "fixing" it both ways (just ignoring the result from
> pci_set_power_state in general, or just ignoring that result on Apple
> cells).

Yes, what would be the correct way to do this? And if it the latter
option, should that be implemented in ohci1394 or in pci_set_power_state?

grep says that almost nobody checks the return code of
pci_set_power_state. But e.g. usb/core/hcd-pci.c does...

(Side note: The sole function that ohci1394's suspend and resume hooks
fulfill right now in mainline is to change power consumption of the
chip. The IEEE 1394 stack as a whole does not survive suspend + resume
yet. A still incomplete solution is in linux1394-2.6.git.)
Stefan Richter
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