Yes, this is a bug in DSI driver. I have sent a patch to fix it. http://lists.freedesktop.org/archives/dri-devel/2015-April/081893.html Sorry for any inconvenience it caused. Hai -----Original Message----- From: dri-devel [mailto:dri-devel-bounces@xxxxxxxxxxxxxxxxxxxxx] On Behalf Of David Binderman Sent: Monday, April 27, 2015 1:59 AM To: airlied@xxxxxxxx; dri-devel@xxxxxxxxxxxxxxxxxxxxx Subject: linux-4.1-rc1/drivers/gpu/drm/msm/dsi/dsi_host.c:1799: possible missing break ? Hello there, [linux-4.1-rc1/drivers/gpu/drm/msm/dsi/dsi_host.c:1799] -> [linux-4.1-rc1/drivers/gpu/drm/msm/dsi/dsi_host.c:1802]: (warning) Variable 'ret' is reassigned a value before the old one has been used. 'break;' missing? switch (cmd) { case MIPI_DSI_RX_ACKNOWLEDGE_AND_ERROR_REPORT: pr_err("%s: rx ACK_ERR_PACLAGE\n", __func__); ret = 0; case MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_1BYTE: case MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_1BYTE: ret = dsi_short_read1_resp(buf, msg); break; Regards David Binderman _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel