________________________________________ Von: kernel-janitors-owner@vger.kernel.org kernel-janitors-owner@vger.kernel.org im Auftrag von Christophe JAILLET christophe.jaillet@wanadoo.fr Gesendet: Sonntag, 8. März 2020 10:26 An: harry.wentland@amd.com; sunpeng.li@amd.com; alexander.deucher@amd.com; christian.koenig@amd.com; David1.Zhou@amd.com; airlied@linux.ie; daniel@ffwll.ch; nicholas.kazlauskas@amd.com; Bhawanpreet.Lakha@amd.com; mario.kleiner.de@gmail.com; David.Francis@amd.com Cc: amd-gfx@lists.freedesktop.org; dri-devel@lists.freedesktop.org; linux-kernel@vger.kernel.org; kernel-janitors@vger.kernel.org; Christophe JAILLET Betreff: [PATCH] drm/amdgpu/display: Fix an error handling path in 'dm_update_crtc_state()'
'dc_stream_release()' may be called twice. Once here, and once below in the error handling path if we branch to the 'fail' label.
Set 'new_stream' to NULL, once released to avoid the duplicated release function call.
Signed-off-by: Christophe JAILLET christophe.jaillet@wanadoo.fr --- Maybe the 'goto fail' at line 7745 should be turned into a 'return ret' instead. Could be clearer.
No Fixes tag provided because I've not been able to dig deep enough in the git history. --- drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index 97c1b01c0fc1..9d7773a77c4f 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -7704,8 +7704,10 @@ static int dm_update_crtc_state(struct amdgpu_display_manager *dm,
skip_modeset: /* Release extra reference */ - if (new_stream) - dc_stream_release(new_stream); + if (new_stream) { + dc_stream_release(new_stream); + new_stream = NULL; + }
dc_stream_release() is NULL-checked, so the if can be dropped.
re, wh
/* * We want to do dc stream updates that do not require a -- 2.20.1