This is a note to let you know that I've just added the patch titled
PCI: Fix devfn for VPD access through function 0
to the 4.1-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
pci-fix-devfn-for-vpd-access-through-function-0.patch
and it can be found in the queue-4.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 9d9240756e63dd87d6cbf5da8b98ceb8f8192b55 Mon Sep 17 00:00:00 2001
From: Alex Williamson <alex.williamson@xxxxxxxxxx>
Date: Tue, 15 Sep 2015 11:17:21 -0600
Subject: PCI: Fix devfn for VPD access through function 0
From: Alex Williamson <alex.williamson@xxxxxxxxxx>
commit 9d9240756e63dd87d6cbf5da8b98ceb8f8192b55 upstream.
Commit 932c435caba8 ("PCI: Add dev_flags bit to access VPD through function
0") passes PCI_SLOT(devfn) for the devfn parameter of pci_get_slot().
Generally this works because we're fairly well guaranteed that a PCIe
device is at slot address 0, but for the general case, including
conventional PCI, it's incorrect. We need to get the slot and then convert
it back into a devfn.
Fixes: 932c435caba8 ("PCI: Add dev_flags bit to access VPD through function 0")
Signed-off-by: Alex Williamson <alex.williamson@xxxxxxxxxx>
Signed-off-by: Bjorn Helgaas <helgaas@xxxxxxxxxx>
Acked-by: Myron Stowe <myron.stowe@xxxxxxxxxx>
Acked-by: Mark Rustad <mark.d.rustad@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/pci/access.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
--- a/drivers/pci/access.c
+++ b/drivers/pci/access.c
@@ -442,7 +442,8 @@ static const struct pci_vpd_ops pci_vpd_
static ssize_t pci_vpd_f0_read(struct pci_dev *dev, loff_t pos, size_t count,
void *arg)
{
- struct pci_dev *tdev = pci_get_slot(dev->bus, PCI_SLOT(dev->devfn));
+ struct pci_dev *tdev = pci_get_slot(dev->bus,
+ PCI_DEVFN(PCI_SLOT(dev->devfn), 0));
ssize_t ret;
if (!tdev)
@@ -456,7 +457,8 @@ static ssize_t pci_vpd_f0_read(struct pc
static ssize_t pci_vpd_f0_write(struct pci_dev *dev, loff_t pos, size_t count,
const void *arg)
{
- struct pci_dev *tdev = pci_get_slot(dev->bus, PCI_SLOT(dev->devfn));
+ struct pci_dev *tdev = pci_get_slot(dev->bus,
+ PCI_DEVFN(PCI_SLOT(dev->devfn), 0));
ssize_t ret;
if (!tdev)
@@ -475,7 +477,8 @@ static const struct pci_vpd_ops pci_vpd_
static int pci_vpd_f0_dev_check(struct pci_dev *dev)
{
- struct pci_dev *tdev = pci_get_slot(dev->bus, PCI_SLOT(dev->devfn));
+ struct pci_dev *tdev = pci_get_slot(dev->bus,
+ PCI_DEVFN(PCI_SLOT(dev->devfn), 0));
int ret = 0;
if (!tdev)
Patches currently in stable-queue which might be from alex.williamson@xxxxxxxxxx are
queue-4.1/pci-use-function-0-vpd-for-identical-functions-regular-vpd-for-others.patch
queue-4.1/pci-fix-devfn-for-vpd-access-through-function-0.patch
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