From: Alex Williamson <alex.williamson@xxxxxxxxxx>
3.12-stable review patch. If anyone has any objections, please let me know.
===============
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: Jiri Slaby <jslaby@xxxxxxx>
---
drivers/pci/access.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/drivers/pci/access.c b/drivers/pci/access.c
index 6bc9b12ba42a..16a022ee54a6 100644
--- a/drivers/pci/access.c
+++ b/drivers/pci/access.c
@@ -362,7 +362,8 @@ static const struct pci_vpd_ops pci_vpd_pci22_ops = {
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)
@@ -376,7 +377,8 @@ static ssize_t pci_vpd_f0_read(struct pci_dev *dev, loff_t pos, size_t count,
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)
@@ -395,7 +397,8 @@ static const struct pci_vpd_ops pci_vpd_f0_ops = {
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)
--
2.11.0
--
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