drm/nouveau: Don't WARN_ON VCPI allocation failures

Submitted by Lyude Paul on Jan. 28, 2019, 9:03 p.m.


Message ID 20190128210352.18066-1-lyude@redhat.com
State New
Headers show
Series "drm/nouveau: Don't WARN_ON VCPI allocation failures" ( rev: 1 ) in Nouveau

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Commit Message

Lyude Paul Jan. 28, 2019, 9:03 p.m.
This is much louder then we want. VCPI allocation failures are quite
normal, since they will happen if any part of the modesetting process is
interrupted by removing the DP MST topology in question. So just print a
debugging message on VCPI failures instead.

Signed-off-by: Lyude Paul <lyude@redhat.com>
Fixes: f479c0ba4a17 ("drm/nouveau/kms/nv50: initial support for DP 1.2 multi-stream")
Cc: Ben Skeggs <bskeggs@redhat.com>
Cc: dri-devel@lists.freedesktop.org
Cc: nouveau@lists.freedesktop.org
Cc: <stable@vger.kernel.org> # v4.10+
 drivers/gpu/drm/nouveau/dispnv50/disp.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

Patch hide | download patch | download mbox

diff --git a/drivers/gpu/drm/nouveau/dispnv50/disp.c b/drivers/gpu/drm/nouveau/dispnv50/disp.c
index 2e8a5fd9b262..09a9c747c7bb 100644
--- a/drivers/gpu/drm/nouveau/dispnv50/disp.c
+++ b/drivers/gpu/drm/nouveau/dispnv50/disp.c
@@ -811,7 +811,8 @@  nv50_msto_enable(struct drm_encoder *encoder)
 	slots = drm_dp_find_vcpi_slots(&mstm->mgr, mstc->pbn);
 	r = drm_dp_mst_allocate_vcpi(&mstm->mgr, mstc->port, mstc->pbn, slots);
-	WARN_ON(!r);
+	if (!r)
+		DRM_DEBUG_KMS("Failed to allocate VCPI\n");
 	if (!mstm->links++)



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This commit has been processed because it contains a "Fixes:" tag,
fixing commit: f479c0ba4a17 drm/nouveau/kms/nv50: initial support for DP 1.2 multi-stream.

The bot has tested the following trees: v4.20.5, v4.19.18, v4.14.96.

v4.20.5: Build OK!
v4.19.18: Build OK!
v4.14.96: Failed to apply! Possible dependencies:
    Unable to calculate

How should we proceed with this patch?