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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 <gustavo.pimentel@synopsys.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Jingoo Han <jingoohan1@gmail.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Joao Pinto <joao.pinto@synopsys.com>
This commit is contained in:
Gustavo Pimentel 2018-12-07 18:24:37 +01:00 committed by Lorenzo Pieralisi
parent 2d8ed461db
commit 0380cf843c
1 changed files with 3 additions and 1 deletions
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4
drivers/pci/controller/dwc/pcie-designware-ep.c
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@ -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);