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Date: Fri, 8 Sep 2023 20:23:26 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc: Yong-Xuan Wang <yongxuan.wang@...ive.com>,
Lorenzo Pieralisi <lpieralisi@...nel.org>,
Serge Semin <fancer.lancer@...il.com>,
Sasha Levin <sashal@...nel.org>, paul.walmsley@...ive.com,
greentime.hu@...ive.com, kw@...ux.com, bhelgaas@...gle.com,
linux-pci@...r.kernel.org
Subject: [PATCH AUTOSEL 5.15 7/7] PCI: fu740: Set the number of MSI vectors
From: Yong-Xuan Wang <yongxuan.wang@...ive.com>
[ 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@sifive.com
Signed-off-by: Yong-Xuan Wang <yongxuan.wang@...ive.com>
Signed-off-by: Lorenzo Pieralisi <lpieralisi@...nel.org>
Reviewed-by: Serge Semin <fancer.lancer@...il.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
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
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