Commit 3c765399 authored Jul 17, 2015 by Bjorn Helgaas

PCI: Rationalize pci_ats_queue_depth() error checking



We previously returned -ENODEV for devices that don't support ATS (except
that we always returned 0 for VFs, whether or not they support ATS).

For consistency, always return -EINVAL (not -ENODEV) if the device doesn't
support ATS.  Return zero for VFs that support ATS.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Joerg Roedel <jroedel@suse.de>

parent 67930995

drivers/pci/ats.c

+4 −4

Original line number	Diff line number	Diff line
		@@ -136,13 +136,13 @@ EXPORT_SYMBOL_GPL(pci_restore_ats_state);
		*/
		int pci_ats_queue_depth(struct pci_dev *dev)
		{
		if (!dev->ats_cap)
		return -EINVAL;

		if (dev->is_virtfn)
		return 0;

		if (dev->ats_cap)
		return dev->ats_qdep;

		return -ENODEV;
		}
		EXPORT_SYMBOL_GPL(pci_ats_queue_depth);