From: Lloyd Atkinson <latkinso@codeaurora.org>
Date: Tue, 16 Jan 2018 16:26:02 -0500
Subject: drm/msm/dsi: correct DSI id bounds check during registration
Git-commit: 6e1787cf45e48866c01dadc2a1b6c3d63d75b8d1
Patch-mainline: v4.17-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166

Check DSI instance id argument against the proper boundary size
to protect against invalid configuration of the DSI id.

Signed-off-by: Lloyd Atkinson <latkinso@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
 drivers/gpu/drm/msm/dsi/dsi_manager.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpu/drm/msm/dsi/dsi_manager.c
+++ b/drivers/gpu/drm/msm/dsi/dsi_manager.c
@@ -862,7 +862,7 @@ int msm_dsi_manager_register(struct msm_
 	int id = msm_dsi->id;
 	int ret;
 
-	if (id > DSI_MAX) {
+	if (id >= DSI_MAX) {
 		pr_err("%s: invalid id %d\n", __func__, id);
 		return -EINVAL;
 	}