From: Yong-Xuan Wang <yongxuan.wang@xxxxxxxxxx> [ Upstream commit 551a60e1225e71fff8efd9390204c505b0870e0f ] The iMSI-RX module of the DW PCIe controller provides multiple sets of MSI_CTRL_INT_i_* registers, and each set is capable of handling 32 MSI interrupts. However, the fu740 PCIe controller driver only enabled one set of MSI_CTRL_INT_i_* registers, as the total number of supported interrupts was not specified. Set the supported number of MSI vectors to enable all the MSI_CTRL_INT_i_* registers on the fu740 PCIe core, allowing the system to fully utilize the available MSI interrupts. Link: https://lore.kernel.org/r/20230807055621.2431-1-yongxuan.wang@xxxxxxxxxx Signed-off-by: Yong-Xuan Wang <yongxuan.wang@xxxxxxxxxx> Signed-off-by: Lorenzo Pieralisi <lpieralisi@xxxxxxxxxx> Reviewed-by: Serge Semin <fancer.lancer@xxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/pci/controller/dwc/pcie-fu740.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/pci/controller/dwc/pcie-fu740.c b/drivers/pci/controller/dwc/pcie-fu740.c index 78d002be4f821..f6c71c1b657b6 100644 --- a/drivers/pci/controller/dwc/pcie-fu740.c +++ b/drivers/pci/controller/dwc/pcie-fu740.c @@ -301,6 +301,7 @@ static int fu740_pcie_probe(struct platform_device *pdev) pci->dev = dev; pci->ops = &dw_pcie_ops; pci->pp.ops = &fu740_pcie_host_ops; + pci->pp.num_vectors = MAX_MSI_IRQS; /* SiFive specific region: mgmt */ afp->mgmt_base = devm_platform_ioremap_resource_byname(pdev, "mgmt"); -- 2.40.1
