linux-kernel - [PATCH v5 1/4] drm: Remove slot checks in dp mst topology during commit

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Date:   Mon, 25 Oct 2021 18:30:25 -0400
From:   Lyude Paul <lyude@...hat.com>
To:     dri-devel@...ts.freedesktop.org, amdgfx@...ts.freedesktop.org
Cc:     Bhawanpreet Lakha <Bhawanpreet.Lakha@....com>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        linux-kernel@...r.kernel.org (open list)
Subject: [PATCH v5 1/4] drm: Remove slot checks in dp mst topology during commit

From: Bhawanpreet Lakha <Bhawanpreet.Lakha@....com>

This code path is used during commit, and we dont expect things to fail
during the commit stage, so remove this.

Signed-off-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@....com>
Reviewed-by: Lyude Paul <lyude@...hat.com>
Signed-off-by: Lyude Paul <lyude@...hat.com>
---
 drivers/gpu/drm/drm_dp_mst_topology.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c
index 86d13d6bc463..04ed34a7f71c 100644
--- a/drivers/gpu/drm/drm_dp_mst_topology.c
+++ b/drivers/gpu/drm/drm_dp_mst_topology.c
@@ -4334,10 +4334,6 @@ static int drm_dp_init_vcpi(struct drm_dp_mst_topology_mgr *mgr,
 {
 	int ret;
 
-	/* max. time slots - one slot for MTP header */
-	if (slots > 63)
-		return -ENOSPC;
-
 	vcpi->pbn = pbn;
 	vcpi->aligned_pbn = slots * mgr->pbn_div;
 	vcpi->num_slots = slots;
@@ -4540,7 +4536,7 @@ bool drm_dp_mst_allocate_vcpi(struct drm_dp_mst_topology_mgr *mgr,
 
 	ret = drm_dp_init_vcpi(mgr, &port->vcpi, pbn, slots);
 	if (ret) {
-		drm_dbg_kms(mgr->dev, "failed to init vcpi slots=%d max=63 ret=%d\n",
+		drm_dbg_kms(mgr->dev, "failed to init vcpi slots=%d ret=%d\n",
 			    DIV_ROUND_UP(pbn, mgr->pbn_div), ret);
 		drm_dp_mst_topology_put_port(port);
 		goto out;
-- 
2.31.1