From 09fefb24ed5e15f3b112f6c04b21a90ea23eaf8b Mon Sep 17 00:00:00 2001 From: Niklas Cassel Date: Mon, 8 Sep 2025 18:59:15 +0200 Subject: PCI: dwc: Verify the single eDMA IRQ in dw_pcie_edma_irq_verify() dw_pcie_edma_irq_verify() is supposed to verify the eDMA IRQs in devicetree by fetching them using either 'dma' or 'dmaX' IRQ names. Former is used when the platform uses a single IRQ for all eDMA channels and latter is used when the platform uses separate IRQ per channel. But currently, dw_pcie_edma_irq_verify() bails out early if edma::nr_irqs is 1, i.e., when a single IRQ is used. This gives an impression that the driver could work with any single IRQ in devicetree, not necessarily with name 'dma'. But dw_pcie_edma_irq_vector(), which actually requests the IRQ, does require the single IRQ to be named as 'dma'. So this creates inconsistency between dw_pcie_edma_irq_verify() and dw_pcie_edma_irq_vector(). Thus, to fix this inconsistency, make sure dw_pcie_edma_irq_verify() also verifies the single IRQ name by removing the bail out code. Signed-off-by: Niklas Cassel [mani: reworded subject and description] Signed-off-by: Manivannan Sadhasivam [bhelgaas: fix typos] Signed-off-by: Bjorn Helgaas Link: https://patch.msgid.link/20250908165914.547002-3-cassel@kernel.org --- drivers/pci/controller/dwc/pcie-designware.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) (limited to 'drivers/pci/controller/dwc') diff --git a/drivers/pci/controller/dwc/pcie-designware.c b/drivers/pci/controller/dwc/pcie-designware.c index 89aad5a08928..c7a2cf5e886f 100644 --- a/drivers/pci/controller/dwc/pcie-designware.c +++ b/drivers/pci/controller/dwc/pcie-designware.c @@ -1045,9 +1045,7 @@ static int dw_pcie_edma_irq_verify(struct dw_pcie *pci) char name[15]; int ret; - if (pci->edma.nr_irqs == 1) - return 0; - else if (pci->edma.nr_irqs > 1) + if (pci->edma.nr_irqs > 1) return pci->edma.nr_irqs != ch_cnt ? -EINVAL : 0; ret = platform_get_irq_byname_optional(pdev, "dma"); -- cgit