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PCI: Rationalize pci_ats_queue_depth() error checking

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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>
This commit is contained in:
Bjorn Helgaas 2015-07-17 15:30:26 -05:00
parent 67930995d7
commit 3c76539952
1 changed files with 4 additions and 4 deletions
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8
drivers/pci/ats.c
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@ -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;
return dev->ats_qdep;
}
EXPORT_SYMBOL_GPL(pci_ats_queue_depth);