From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Dave Airlie , Borislav Petkov , Daniel Vetter Subject: [ 052/102] drm: dont check modeset locks in panic handler Date: Fri, 17 May 2013 14:36:07 -0700 Message-Id: <20130517213249.824850746@linuxfoundation.org> In-Reply-To: <20130517213244.277411019@linuxfoundation.org> References: <20130517213244.277411019@linuxfoundation.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: 3.9-stable review patch. If anyone has any objections, please let me know. ------------------ From: Daniel Vetter commit a9b054e8ab06504c2afa0e307ee78d3778993a1d upstream. Since we know that locking is broken in that case and it's more important to not flood the dmesg with random gunk. Reported-and-tested-by: Borislav Petkov References: http://lkml.kernel.org/r/20130502000206.GH15623@pd.tnic Cc: Dave Airlie Cc: Borislav Petkov Signed-off-by: Daniel Vetter Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/drm_crtc.c | 4 ++++ 1 file changed, 4 insertions(+) --- a/drivers/gpu/drm/drm_crtc.c +++ b/drivers/gpu/drm/drm_crtc.c @@ -78,6 +78,10 @@ void drm_warn_on_modeset_not_all_locked( { struct drm_crtc *crtc; + /* Locking is currently fubar in the panic handler. */ + if (oops_in_progress) + return; + list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) WARN_ON(!mutex_is_locked(&crtc->mutex));