[PATCH] drm/bridge: ti-sn65dsi86: Avoid possible buffer overflow

[Su Hui]

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

Fixes: cea86c5bb442 ("drm/bridge: ti-sn65dsi86: Implement the pwm_chip")
Signed-off-by: Su Hui <suhui at nfschina.com>
---
 drivers/gpu/drm/bridge/ti-sn65dsi86.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi86.c b/drivers/gpu/drm/bridge/ti-sn65dsi86.c
index 7a748785c545..952aae4221e7 100644
--- a/drivers/gpu/drm/bridge/ti-sn65dsi86.c
+++ b/drivers/gpu/drm/bridge/ti-sn65dsi86.c
@@ -305,7 +305,8 @@ static void ti_sn_bridge_set_refclk_freq(struct ti_sn65dsi86 *pdata)
 	 * The PWM refclk is based on the value written to SN_DPPLL_SRC_REG,
 	 * regardless of its actual sourcing.
 	 */
-	pdata->pwm_refclk_freq = ti_sn_bridge_refclk_lut[i];
+	if (i < refclk_lut_size)
+		pdata->pwm_refclk_freq = ti_sn_bridge_refclk_lut[i];
 }
 
 static void ti_sn65dsi86_enable_comms(struct ti_sn65dsi86 *pdata)
-- 
2.30.2