On 6/17/21 1:19 PM, Jonathan Liu wrote:
If attach has not been called, unloading the driver can result in a null pointer dereference in mipi_dsi_detach as ctx->dsi has not been assigned yet. Fixes: ceb515ba29ba6b ("drm/bridge: ti-sn65dsi83: Add TI SN65DSI83 and SN65DSI84 driver") Signed-off-by: Jonathan Liu <net147@xxxxxxxxx> --- drivers/gpu/drm/bridge/ti-sn65dsi83.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi83.c b/drivers/gpu/drm/bridge/ti-sn65dsi83.c index 750f2172ef08..8e9f45c5c7c1 100644 --- a/drivers/gpu/drm/bridge/ti-sn65dsi83.c +++ b/drivers/gpu/drm/bridge/ti-sn65dsi83.c @@ -671,8 +671,11 @@ static int sn65dsi83_remove(struct i2c_client *client) { struct sn65dsi83 *ctx = i2c_get_clientdata(client);- mipi_dsi_detach(ctx->dsi);- mipi_dsi_device_unregister(ctx->dsi); + if (ctx->dsi) { + mipi_dsi_detach(ctx->dsi); + mipi_dsi_device_unregister(ctx->dsi); + } + drm_bridge_remove(&ctx->bridge); of_node_put(ctx->host_node);
Looks OK to me. Reviewed-by: Marek Vasut <marex@xxxxxxx> Thanks !
