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authorDexuan Cui <dexuan.cui@intel.com>2009-12-07 13:03:21 +0800
committerJesse Barnes <jbarnes@virtuousgeek.org>2009-12-16 13:37:50 -0800
commitb9c3b266411d27f1a6466c19d146d08db576bfea (patch)
treec310b37e7dff6607e22eca0b690c2a3f290c85a9 /drivers/pci/pci.c
parent2820f333e3b4ad96590093efbed7b3400bcf492b (diff)
downloadop-kernel-dev-b9c3b266411d27f1a6466c19d146d08db576bfea.zip
op-kernel-dev-b9c3b266411d27f1a6466c19d146d08db576bfea.tar.gz
PCI: support device-specific reset methods
Add a new type of quirk for resetting devices at pci_dev_reset time. This is necessary to handle device with nonstandard reset procedures, especially useful for guest drivers. Signed-off-by: Yu Zhao <yu.zhao@intel.com> Signed-off-by: Dexuan Cui <dexuan.cui@intel.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Diffstat (limited to 'drivers/pci/pci.c')
-rw-r--r--drivers/pci/pci.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 0bc27e0..6011d06 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -2284,6 +2284,21 @@ static int pci_parent_bus_reset(struct pci_dev *dev, int probe)
return 0;
}
+static int pci_dev_specific_reset(struct pci_dev *dev, int probe)
+{
+ struct pci_dev_reset_methods *i;
+
+ for (i = pci_dev_reset_methods; i->reset; i++) {
+ if ((i->vendor == dev->vendor ||
+ i->vendor == (u16)PCI_ANY_ID) &&
+ (i->device == dev->device ||
+ i->device == (u16)PCI_ANY_ID))
+ return i->reset(dev, probe);
+ }
+
+ return -ENOTTY;
+}
+
static int pci_dev_reset(struct pci_dev *dev, int probe)
{
int rc;
@@ -2296,6 +2311,10 @@ static int pci_dev_reset(struct pci_dev *dev, int probe)
down(&dev->dev.sem);
}
+ rc = pci_dev_specific_reset(dev, probe);
+ if (rc != -ENOTTY)
+ goto done;
+
rc = pcie_flr(dev, probe);
if (rc != -ENOTTY)
goto done;
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