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Subject[PATCH] PCI: Support SRIOV on Legacy EndPoint device
Date
From: Kelly Zytaruk <kelly.zytaruk@amd.com>

It is not neccessary to check for PCI_EXP_TYPE in sriov_init(). There appears to be no reason for the check.

Some AMD GPUs have hardware support for grapics SRIOV.
If the GPU has a display output then the GPU needs to support Legacy VGA operation.
If CLASS_CODE = VGA then the device should have a Port Type = Legacy EndPoint.
Therefore in order to enable SRIOV on a GPU with a display output, LEGACY_END_POINT is supported as a valid Port Type by removing the check for Port Type.

Patch is also logged in Bugzilla #112221

Signed-off-by: Kelly Zytaruk <kelly.zytaruk@amd.com>
---
drivers/pci/iov.c | 4 ----
1 file changed, 4 deletions(-)

diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c
index 31f31d4..fe4bd0a 100644
--- a/drivers/pci/iov.c
+++ b/drivers/pci/iov.c
@@ -387,10 +387,6 @@ static int sriov_init(struct pci_dev *dev, int pos)
struct resource *res;
struct pci_dev *pdev;

- if (pci_pcie_type(dev) != PCI_EXP_TYPE_RC_END &&
- pci_pcie_type(dev) != PCI_EXP_TYPE_ENDPOINT)
- return -ENODEV;
-
pci_read_config_word(dev, pos + PCI_SRIOV_CTRL, &ctrl);
if (ctrl & PCI_SRIOV_CTRL_VFE) {
pci_write_config_word(dev, pos + PCI_SRIOV_CTRL, 0);
--
1.7.10.4
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