5.15-stable review patch. If anyone has any objections, please let me know.
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From: Niklas Cassel cassel@kernel.org
commit b640d42a6ac9ba01abe65ec34f7c73aaf6758ab8 upstream.
The pci_epc_raise_irq() supplies a MSI or MSI-X interrupt number in range (1-N), as per the pci_epc_raise_irq() kdoc, where N is 32 for MSI.
But tegra_pcie_ep_raise_msi_irq() incorrectly uses the interrupt number as the MSI vector. This causes wrong MSI vector to be triggered, leading to the failure of PCI endpoint Kselftest MSI_TEST test case.
To fix this issue, convert the interrupt number to MSI vector.
Fixes: c57247f940e8 ("PCI: tegra: Add support for PCIe endpoint mode in Tegra194") Signed-off-by: Niklas Cassel cassel@kernel.org Signed-off-by: Manivannan Sadhasivam mani@kernel.org Cc: stable@vger.kernel.org Link: https://patch.msgid.link/20250922140822.519796-6-cassel@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/pci/controller/dwc/pcie-tegra194.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/pci/controller/dwc/pcie-tegra194.c +++ b/drivers/pci/controller/dwc/pcie-tegra194.c @@ -1839,10 +1839,10 @@ static int tegra_pcie_ep_raise_legacy_ir
static int tegra_pcie_ep_raise_msi_irq(struct tegra_pcie_dw *pcie, u16 irq) { - if (unlikely(irq > 31)) + if (unlikely(irq > 32)) return -EINVAL;
- appl_writel(pcie, BIT(irq), APPL_MSI_CTRL_1); + appl_writel(pcie, BIT(irq - 1), APPL_MSI_CTRL_1);
return 0; }