[PATCH 6.0 0565/1073] PCI: dwc: Fix n_fts[] array overrun

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From: Vidya Sagar <vidyas@xxxxxxxxxx>

[ Upstream commit 66110361281b2f7da0c8bd51eaf1f152f4236035 ]

commit aeaa0bfe89654 ("PCI: dwc: Move N_FTS setup to common setup")
incorrectly uses pci->link_gen in deriving the index to the
n_fts[] array also introducing the issue of accessing beyond the
boundaries of array for greater than Gen-2 speeds. This change fixes
that issue.

Link: https://lore.kernel.org/r/20220926111923.22487-1-vidyas@xxxxxxxxxx
Fixes: aeaa0bfe8965 ("PCI: dwc: Move N_FTS setup to common setup")
Signed-off-by: Vidya Sagar <vidyas@xxxxxxxxxx>
Signed-off-by: Lorenzo Pieralisi <lpieralisi@xxxxxxxxxx>
Reviewed-by: Rob Herring <robh@xxxxxxxxxx>
Acked-by: Jingoo Han <jingoohan1@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/pci/controller/dwc/pcie-designware.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pci/controller/dwc/pcie-designware.c b/drivers/pci/controller/dwc/pcie-designware.c
index c6725c519a47..9e4d96e5a3f5 100644
--- a/drivers/pci/controller/dwc/pcie-designware.c
+++ b/drivers/pci/controller/dwc/pcie-designware.c
@@ -641,7 +641,7 @@ void dw_pcie_setup(struct dw_pcie *pci)
 	if (pci->n_fts[1]) {
 		val = dw_pcie_readl_dbi(pci, PCIE_LINK_WIDTH_SPEED_CONTROL);
 		val &= ~PORT_LOGIC_N_FTS_MASK;
-		val |= pci->n_fts[pci->link_gen - 1];
+		val |= pci->n_fts[1];
 		dw_pcie_writel_dbi(pci, PCIE_LINK_WIDTH_SPEED_CONTROL, val);
 	}
 
-- 
2.35.1






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