From: Manivannan Sadhasivam Date: Tue, 24 Jan 2023 07:11:54 +0000 (+0530) Subject: PCI: dra7xx: Use threaded IRQ handler for "dra7xx-pcie-main" IRQ X-Git-Tag: v6.6.17~5448^2~9^2~4 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=da87d35a6e51480703d6f055e7a1b52c85731d7e;p=platform%2Fkernel%2Flinux-rpi.git PCI: dra7xx: Use threaded IRQ handler for "dra7xx-pcie-main" IRQ The "dra7xx-pcie-main" hard IRQ handler is just printing the IRQ status and calling the dw_pcie_ep_linkup() API if LINK_UP status is set. But the execution of dw_pcie_ep_linkup() depends on the EPF driver and may take more time depending on the EPF implementation. In general, hard IRQ handlers are supposed to return quickly and not block for so long. Moreover, there is no real need of the current IRQ handler to be a hard IRQ handler. So switch to the threaded IRQ handler for the "dra7xx-pcie-main" IRQ. Link: https://lore.kernel.org/linux-pci/20230124071158.5503-2-manivannan.sadhasivam@linaro.org Signed-off-by: Manivannan Sadhasivam Signed-off-by: Krzysztof Wilczyński Acked-by: Kishon Vijay Abraham I --- diff --git a/drivers/pci/controller/dwc/pci-dra7xx.c b/drivers/pci/controller/dwc/pci-dra7xx.c index 38462ed..4ae807e 100644 --- a/drivers/pci/controller/dwc/pci-dra7xx.c +++ b/drivers/pci/controller/dwc/pci-dra7xx.c @@ -840,7 +840,7 @@ static int dra7xx_pcie_probe(struct platform_device *pdev) } dra7xx->mode = mode; - ret = devm_request_irq(dev, irq, dra7xx_pcie_irq_handler, + ret = devm_request_threaded_irq(dev, irq, NULL, dra7xx_pcie_irq_handler, IRQF_SHARED, "dra7xx-pcie-main", dra7xx); if (ret) { dev_err(dev, "failed to request irq\n");