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drm/bridge: ti-sn65dsi86: Avoid possible buffer overflow

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[ Upstream commit 95011f267c44a4d1f9ca1769e8a29ab2c559e004 ]

Smatch error:buffer overflow 'ti_sn_bridge_refclk_lut' 5 <= 5.

Fixes: cea86c5bb4 ("drm/bridge: ti-sn65dsi86: Implement the pwm_chip")
Signed-off-by: Su Hui <suhui@nfschina.com>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20230608012443.839372-1-suhui@nfschina.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Su Hui 2023-06-08 09:24:43 +08:00 committed by Greg Kroah-Hartman
parent 90748be0f4
commit a5acbe4ea5
1 changed files with 4 additions and 0 deletions
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4
drivers/gpu/drm/bridge/ti-sn65dsi86.c
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@ -298,6 +298,10 @@ static void ti_sn_bridge_set_refclk_freq(struct ti_sn65dsi86 *pdata)
if (refclk_lut[i] == refclk_rate)
break;
/* avoid buffer overflow and "1" is the default rate in the datasheet. */
if (i >= refclk_lut_size)
i = 1;
regmap_update_bits(pdata->regmap, SN_DPPLL_SRC_REG, REFCLK_FREQ_MASK,
REFCLK_FREQ(i));