Add debug error message when MSI-X entry control mask bit is set, to help
debug the reason why a MSI-X interrupt is not being triggered.
Cc: Jingoo Han <jingoohan1@xxxxxxxxx>
Cc: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
Cc: Joao Pinto <joao.pinto@xxxxxxxxxxxx>
Cc: linux-pci@xxxxxxxxxxxxxxx
Signed-off-by: Gustavo Pimentel <gustavo.pimentel@xxxxxxxxxxxx>
---
drivers/pci/controller/dwc/pcie-designware-ep.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/pci/controller/dwc/pcie-designware-ep.c b/drivers/pci/controller/dwc/pcie-designware-ep.c
index 1e7b022..a969322 100644
--- a/drivers/pci/controller/dwc/pcie-designware-ep.c
+++ b/drivers/pci/controller/dwc/pcie-designware-ep.c
@@ -466,8 +466,10 @@ int dw_pcie_ep_raise_msix_irq(struct dw_pcie_ep *ep, u8 func_no,
iounmap(msix_tbl);
- if (vec_ctrl & PCI_MSIX_ENTRY_CTRL_MASKBIT)
+ if (vec_ctrl & PCI_MSIX_ENTRY_CTRL_MASKBIT) {
+ dev_dbg(pci->dev, "MSI-X entry ctrl set\n");
return -EPERM;
+ }
ret = dw_pcie_ep_map_addr(epc, func_no, ep->msi_mem_phys, msg_addr,
epc->mem->page_size);
--
2.7.4
