From: Joerg Roedel <jroedel@suse.de>
To: Bjorn Helgaas <bhelgaas@google.com>
Cc: linux-pci@vger.kernel.org, Gregor Dick <gdick@solarflare.com>
Subject: Re: [PATCH 4/8] PCI: Rationalize pci_ats_queue_depth() error checking
Date: Mon, 20 Jul 2015 16:15:01 +0200 [thread overview]
Message-ID: <20150720141501.GD13082@suse.de> (raw)
In-Reply-To: <20150717213215.18379.59848.stgit@bhelgaas-glaptop2.roam.corp.google.com>
On Fri, Jul 17, 2015 at 04:32:16PM -0500, Bjorn Helgaas wrote:
> 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>
> ---
> drivers/pci/ats.c | 8 ++++----
> 1 file changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/pci/ats.c b/drivers/pci/ats.c
> index 2f1fb9c..ea459b3 100644
> --- a/drivers/pci/ats.c
> +++ b/drivers/pci/ats.c
> @@ -121,13 +121,13 @@ 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);
Reviewed-by: Joerg Roedel <jroedel@suse.de>
next prev parent reply other threads:[~2015-07-20 14:15 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-17 21:31 [PATCH 0/8] PCI: Fix ATS deadlock Bjorn Helgaas
2015-07-17 21:31 ` [PATCH 1/8] PCI: Allocate ATS struct during enumeration Bjorn Helgaas
2015-07-20 13:47 ` Bjorn Helgaas
2015-07-20 13:55 ` Joerg Roedel
2015-07-20 15:34 ` Bjorn Helgaas
2015-07-17 21:32 ` [PATCH 2/8] PCI: Embed ATS info directly into struct pci_dev Bjorn Helgaas
2015-07-20 14:03 ` Joerg Roedel
2015-07-20 16:26 ` Bjorn Helgaas
2015-07-17 21:32 ` [PATCH 3/8] PCI: Reduce size of ATS structure elements Bjorn Helgaas
2015-07-20 14:27 ` Joerg Roedel
2015-07-17 21:32 ` [PATCH 4/8] PCI: Rationalize pci_ats_queue_depth() error checking Bjorn Helgaas
2015-07-20 14:15 ` Joerg Roedel [this message]
2015-07-17 21:32 ` [PATCH 5/8] PCI: Inline the ATS setup code into pci_ats_init() Bjorn Helgaas
2015-07-20 14:15 ` Joerg Roedel
2015-07-17 21:32 ` [PATCH 6/8] PCI: Use pci_physfn() rather than looking up physfn by hand Bjorn Helgaas
2015-07-20 14:17 ` Joerg Roedel
2015-07-17 21:32 ` [PATCH 7/8] PCI: Clean up ATS error handling Bjorn Helgaas
2015-07-20 14:24 ` Joerg Roedel
2015-07-20 15:57 ` Bjorn Helgaas
2015-07-17 21:32 ` [PATCH 8/8] PCI: Move ATS declarations to linux/pci.h so they're all together Bjorn Helgaas
2015-07-20 14:25 ` Joerg Roedel
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