From: Hou Zhiqiang <Zhiqiang.Hou@xxxxxxx>
[ Upstream commit cbd50b3ca3964c79dac65fda277637577e029e8c ]
Current check for devfn number in mobiveil_pci_valid_device() is
wrong in that it flags as invalid functions present in PCI device 0
in the root bus while it is perfectly valid to access all functions
in PCI device 0 in the root bus.
Update the check in mobiveil_pci_valid_device() to fix the issue.
Fixes: 9af6bcb11e12 ("PCI: mobiveil: Add Mobiveil PCIe Host Bridge IP driver")
Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@xxxxxxx>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@xxxxxxx>
Reviewed-by: Minghuan Lian <Minghuan.Lian@xxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/pci/controller/pcie-mobiveil.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/pci/controller/pcie-mobiveil.c b/drivers/pci/controller/pcie-mobiveil.c
index dc228eb500edd..476be4f3c7f6e 100644
--- a/drivers/pci/controller/pcie-mobiveil.c
+++ b/drivers/pci/controller/pcie-mobiveil.c
@@ -174,7 +174,7 @@ static bool mobiveil_pcie_valid_device(struct pci_bus *bus, unsigned int devfn)
* Do not read more than one device on the bus directly
* attached to RC
*/
- if ((bus->primary == pcie->root_bus_nr) && (devfn > 0))
+ if ((bus->primary == pcie->root_bus_nr) && (PCI_SLOT(devfn) > 0))
return false;
return true;
--
2.20.1
