[PATCH v5 6/8] drm/msm/dsi: Add check for slice_width in dsi_timing_setup

[Jessica Zhang <quic_jesszhan@xxxxxxxxxxx>]

Add a check for valid dsc->slice_width value in dsi_timing_setup.

Signed-off-by: Jessica Zhang <quic_jesszhan@xxxxxxxxxxx>
---
 drivers/gpu/drm/msm/dsi/dsi_host.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c
index 508577c596ff..6a6218a9655f 100644
--- a/drivers/gpu/drm/msm/dsi/dsi_host.c
+++ b/drivers/gpu/drm/msm/dsi/dsi_host.c
@@ -937,6 +937,12 @@ static void dsi_timing_setup(struct msm_dsi_host *msm_host, bool is_bonded_dsi)
 			return;
 		}
 
+		if (!dsc->slice_width || (mode->hdisplay < dsc->slice_width)) {
+			pr_err("DSI: invalid slice width %d (pic_width: %d)\n",
+			       dsc->slice_width, mode->hdisplay);
+			return;
+		}
+
 		dsc->pic_width = mode->hdisplay;
 		dsc->pic_height = mode->vdisplay;
 		DBG("Mode %dx%d\n", dsc->pic_width, dsc->pic_height);

-- 
2.40.0