From 0380cf843c54d9ee506f5dadc00dd4fe524c99a6 Mon Sep 17 00:00:00 2001 From: Gustavo Pimentel Date: Fri, 7 Dec 2018 18:24:37 +0100 Subject: [PATCH] PCI: dwc: Print debug error message when MSI-X entry control mask bit is set 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. Signed-off-by: Gustavo Pimentel Signed-off-by: Lorenzo Pieralisi Cc: Jingoo Han Cc: Bjorn Helgaas Cc: Joao Pinto --- 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 a543c45c7224..5e766af04b66 100644 --- a/drivers/pci/controller/dwc/pcie-designware-ep.c +++ b/drivers/pci/controller/dwc/pcie-designware-ep.c @@ -465,8 +465,10 @@ 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); -- 2.25.1