On Tue, 2017-09-12 at 13:43 -0600, Jens Axboe wrote:
> CC'ing the guilty part and Bjorn. I'm assuming it's the
> pci_is_enabled() check, since the rest of the patch shouldn't have
> functional changes.
and pci_enable_bridge() already checks if it's already enabled, but
still enables mastering in that case if it isn't:
static void pci_enable_bridge(struct pci_dev *dev)
{
[...]
if (pci_is_enabled(dev)) {
if (!dev->is_busmaster)
pci_set_master(dev);
return;
}
so I guess due to the new check we end up with mastering disabled, and
thus the firmware can't load since that's a DMA thing?
johannes
