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drm/tegra: Avoid potential 32-bit integer overflow

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[ Upstream commit 2429b3c529 ]

In tegra_sor_compute_config(), the 32-bit value mode->clock is
multiplied by 1000, and assigned to the u64 variable pclk. We can avoid
a potential 32-bit integer overflow by casting mode->clock to u64 before
we do the arithmetic and assignment.

Signed-off-by: Nur Hussein <hussein@unixcat.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Nur Hussein
2023-04-06 04:25:59 +08:00
committed by Greg Kroah-Hartman
parent a7f9c14ace
commit a6eb3aa0ec
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/tegra/sor.c
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@@ -1153,7 +1153,7 @@ static int tegra_sor_compute_config(struct tegra_sor *sor,
struct drm_dp_link *link) struct drm_dp_link *link)
{ {
const u64 f = 100000, link_rate = link->rate * 1000; const u64 f = 100000, link_rate = link->rate * 1000;
const u64 pclk = mode->clock * 1000; const u64 pclk = (u64)mode->clock * 1000;
u64 input, output, watermark, num; u64 input, output, watermark, num;
struct tegra_sor_params params; struct tegra_sor_params params;
u32 num_syms_per_line; u32 num_syms_per_line;