[PATCH 1/1] Fix ARI enabling for a NVME devices

[Andrei Leonvikov]

From: Andrei Leonchikov <andreil...@gmail.com>

Signed-off-by: Andrei Leonchikov <andreil...@gmail.com>
---
 drivers/pci/pci.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 1b27b5af3..ed5f0888c 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -3149,9 +3149,12 @@ void pci_configure_ari(struct pci_dev *dev)
        if (!bridge)
                return;
 
-       pcie_capability_read_dword(bridge, PCI_EXP_DEVCAP2, &cap);
-       if (!(cap & PCI_EXP_DEVCAP2_ARI))
-               return;
+       if ((dev->driver != NULL) && (strncmp(dev->driver->name, "nvme", 4) == 
0)) {
+               // for NVME device this field always zero, but ARI can be 
enabled
+               pcie_capability_read_dword(bridge, PCI_EXP_DEVCAP2, &cap);
+               if (!(cap & PCI_EXP_DEVCAP2_ARI))
+                       return;
+       }
 
        if (pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ARI)) {
                pcie_capability_set_word(bridge, PCI_EXP_DEVCTL2,
-- 
2.21.0