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authorBjorn Helgaas <bhelgaas@google.com>2015-07-17 23:30:26 +0300
committerBjorn Helgaas <bhelgaas@google.com>2015-08-13 23:57:22 +0300
commit3c765399524308ab36777a443ce77e19810a97d7 (patch)
tree2698456eafb15a32339f5d177fc6bb413e1bb321 /drivers/pci/ats.c
parent67930995d7fb8ae7d2078822b563010b289ace2e (diff)
downloadlinux-3c765399524308ab36777a443ce77e19810a97d7.tar.xz
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>
Diffstat (limited to 'drivers/pci/ats.c')
-rw-r--r--drivers/pci/ats.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/pci/ats.c b/drivers/pci/ats.c
index 690ae6e6786c..9a98b3a4f983 100644
--- a/drivers/pci/ats.c
+++ b/drivers/pci/ats.c
@@ -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);