drm: msm: dsi: keep a reference on msm_host->device_node until driver removal

Since the device_node pointer is stored for later usage, its refcount
must not be decreased to prevent deletion of the object while it may
still be referenced.

diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c
index 25916502e429218435acb58446b89a732b91e181..f677e9b55c65922c712a9f06efdcdf3f4130c3a2 100644 (file)
--- a/drivers/gpu/drm/msm/dsi/dsi_host.c
+++ b/drivers/gpu/drm/msm/dsi/dsi_host.c
@@ -1307,12 +1307,12 @@ static int dsi_host_detach(struct mipi_dsi_host *host,
 {
        struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
 
-       msm_host->device_node = NULL;
-
        DBG("id=%d", msm_host->id);
        if (msm_host->dev && of_drm_find_panel(msm_host->device_node))
                drm_helper_hpd_irq_event(msm_host->dev);
 
+       of_node_put(msm_host->device_node);
+       msm_host->device_node = NULL;
        return 0;
 }
 
@@ -1402,7 +1402,6 @@ static int dsi_host_parse_dt(struct msm_dsi_host *msm_host)
        }
 
        of_node_put(endpoint);
-       of_node_put(device_node);
 
        msm_host->device_node = device_node;