From aea24171c85edbff1e021016e8ea1bf64b89a4f8 Mon Sep 17 00:00:00 2001 From: Sean Paul Date: Mon, 30 Jul 2018 11:26:53 -0400 Subject: [PATCH] drm/msm: dsi: Initialize msm_dsi->id to -1 Currently msm_dsi->id is initialized to 0 during kzalloc. If bind fails for a secondary dsi device before its id can be properly set (such as during dt parsing), the id will point to the primary dsi device, causing its reference to be removed from dsi_manager's global (msm_dsim_glb) array. This patch initializes the id to -1 and checks for negative in the manager cleanup. Cc: Doug Anderson Reviewed-by: Abhinav Kumar Signed-off-by: Sean Paul Signed-off-by: Rob Clark --- drivers/gpu/drm/msm/dsi/dsi.c | 1 + drivers/gpu/drm/msm/dsi/dsi_manager.c | 4 +++- 2 files changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/msm/dsi/dsi.c b/drivers/gpu/drm/msm/dsi/dsi.c index ff8164cc6738..ee07d58c2d97 100644 --- a/drivers/gpu/drm/msm/dsi/dsi.c +++ b/drivers/gpu/drm/msm/dsi/dsi.c @@ -83,6 +83,7 @@ static struct msm_dsi *dsi_init(struct platform_device *pdev) return ERR_PTR(-ENOMEM); DBG("dsi probed=%p", msm_dsi); + msm_dsi->id = -1; msm_dsi->pdev = pdev; platform_set_drvdata(pdev, msm_dsi); diff --git a/drivers/gpu/drm/msm/dsi/dsi_manager.c b/drivers/gpu/drm/msm/dsi/dsi_manager.c index 5224010d90e4..80aa6344185e 100644 --- a/drivers/gpu/drm/msm/dsi/dsi_manager.c +++ b/drivers/gpu/drm/msm/dsi/dsi_manager.c @@ -839,6 +839,8 @@ void msm_dsi_manager_unregister(struct msm_dsi *msm_dsi) if (msm_dsi->host) msm_dsi_host_unregister(msm_dsi->host); - msm_dsim->dsi[msm_dsi->id] = NULL; + + if (msm_dsi->id >= 0) + msm_dsim->dsi[msm_dsi->id] = NULL; } -- 2.20.1