linux-kernel - [PATCH AUTOSEL 5.10 06/25] PCI: tegra194: Fix MSI-X programming

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Date:   Sat, 11 Sep 2021 09:12:53 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Om Prakash Singh <omp@...dia.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Vidya Sagar <vidyas@...dia.com>,
        Sasha Levin <sashal@...nel.org>, linux-pci@...r.kernel.org,
        linux-tegra@...r.kernel.org
Subject: [PATCH AUTOSEL 5.10 06/25] PCI: tegra194: Fix MSI-X programming

From: Om Prakash Singh <omp@...dia.com>

[ Upstream commit 43537cf7e351264a1f05ed42ad402942bfc9140e ]

Lower order MSI-X address is programmed in MSIX_ADDR_MATCH_HIGH_OFF
DBI register instead of higher order address. This patch fixes this
programming mistake.

Link: https://lore.kernel.org/r/20210623100525.19944-3-omp@nvidia.com
Signed-off-by: Om Prakash Singh <omp@...dia.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@....com>
Reviewed-by: Bjorn Helgaas <bhelgaas@...gle.com>
Acked-by: Vidya Sagar <vidyas@...dia.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/pci/controller/dwc/pcie-tegra194.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pci/controller/dwc/pcie-tegra194.c b/drivers/pci/controller/dwc/pcie-tegra194.c
index c2827a8d208f..a5b677ec0769 100644
--- a/drivers/pci/controller/dwc/pcie-tegra194.c
+++ b/drivers/pci/controller/dwc/pcie-tegra194.c
@@ -1778,7 +1778,7 @@ static void pex_ep_event_pex_rst_deassert(struct tegra_pcie_dw *pcie)
 	val = (ep->msi_mem_phys & MSIX_ADDR_MATCH_LOW_OFF_MASK);
 	val |= MSIX_ADDR_MATCH_LOW_OFF_EN;
 	dw_pcie_writel_dbi(pci, MSIX_ADDR_MATCH_LOW_OFF, val);
-	val = (lower_32_bits(ep->msi_mem_phys) & MSIX_ADDR_MATCH_HIGH_OFF_MASK);
+	val = (upper_32_bits(ep->msi_mem_phys) & MSIX_ADDR_MATCH_HIGH_OFF_MASK);
 	dw_pcie_writel_dbi(pci, MSIX_ADDR_MATCH_HIGH_OFF, val);
 
 	ret = dw_pcie_ep_init_complete(ep);
-- 
2.30.2