This is a note to let you know that I've just added the patch titled
PCI: fu740: Set the number of MSI vectors
to the 6.5-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
pci-fu740-set-the-number-of-msi-vectors.patch
and it can be found in the queue-6.5 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 9b4e8bef06c9c1ca9f7c2ace5be3a84ffdb7c164
Author: Yong-Xuan Wang <yongxuan.wang@xxxxxxxxxx>
Date: Mon Aug 7 05:56:21 2023 +0000
PCI: fu740: Set the number of MSI vectors
[ 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>
diff --git a/drivers/pci/controller/dwc/pcie-fu740.c b/drivers/pci/controller/dwc/pcie-fu740.c
index 0c90583c078bf..1e9b44b8bba48 100644
--- a/drivers/pci/controller/dwc/pcie-fu740.c
+++ b/drivers/pci/controller/dwc/pcie-fu740.c
@@ -299,6 +299,7 @@ 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");
