On Wed, Jun 06, 2012 at 12:42:07PM -0700, Eric W. Biederman wrote: > pci_device_shutdown calls drv->shutdown before calling > pci_device_disable. Which means that only devices that have trouble > with this bit being flipped while DMA is ongoing and don't bother > to stop their own DMA will have a problem. drv->shutdown should already be quiescing the hardware. If it isn't, it should be. If it is, what does this patch fix? Many drivers call pci_enable_device() early enough that they clearly expect the hardware to be quiescent when they do so, so this really does seem to simply handle the kexec case without handling any other cases that could be similarly problematic. -- Matthew Garrett | mjg59@xxxxxxxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
