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PCI: dwc: Fix n_fts[] array overrun

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[ 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@nvidia.com
Fixes: aeaa0bfe8965 ("PCI: dwc: Move N_FTS setup to common setup")
Signed-off-by: Vidya Sagar <vidyas@nvidia.com>
Signed-off-by: Lorenzo Pieralisi <lpieralisi@kernel.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Acked-by: Jingoo Han <jingoohan1@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Vidya Sagar 2022-09-26 16:49:23 +05:30 committed by Greg Kroah-Hartman
parent 10ae636115
commit a00a7ac251
1 changed files with 1 additions and 1 deletions
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2
drivers/pci/controller/dwc/pcie-designware.c
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@ -730,7 +730,7 @@ 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);
}