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openmptcprouter/root/target/linux/bcm27xx/patches-5.15/0613-drm-vc4-kms-Don-t-duplicate-pending-commit.patch
2021-11-24 18:32:01 +01:00

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From ff06c5211fc9921c45ed2fe23f43ff2e8656c402 Mon Sep 17 00:00:00 2001
From: Maxime Ripard <maxime@cerno.tech>
Date: Thu, 21 Oct 2021 13:57:44 +0200
Subject: [PATCH 613/634] drm/vc4: kms: Don't duplicate pending commit
Our HVS global state, when duplicated, will also copy the pointer to the
drm_crtc_commit (and increase the reference count) for each FIFO if the
pointer is not NULL.
However, our atomic_setup function will overwrite that pointer without
putting the reference back leading to a memory leak.
Since the commit is only relevant during the atomic commit process, it
doesn't make sense to duplicate the reference to the commit anyway.
Let's remove it.
Fixes: 9ec03d7f1ed3 ("drm/vc4: kms: Wait on previous FIFO users before a commit")
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
---
drivers/gpu/drm/vc4/vc4_kms.c | 6 ------
1 file changed, 6 deletions(-)
diff --git a/drivers/gpu/drm/vc4/vc4_kms.c b/drivers/gpu/drm/vc4/vc4_kms.c
index 59f10c4d76ae..2ac6c7c66fc2 100644
--- a/drivers/gpu/drm/vc4/vc4_kms.c
+++ b/drivers/gpu/drm/vc4/vc4_kms.c
@@ -720,12 +720,6 @@ vc4_hvs_channels_duplicate_state(struct drm_private_obj *obj)
for (i = 0; i < HVS_NUM_CHANNELS; i++) {
state->fifo_state[i].in_use = old_state->fifo_state[i].in_use;
state->fifo_state[i].fifo_load = old_state->fifo_state[i].fifo_load;
-
- if (!old_state->fifo_state[i].pending_commit)
- continue;
-
- state->fifo_state[i].pending_commit =
- drm_crtc_commit_get(old_state->fifo_state[i].pending_commit);
}
state->core_clock_rate = old_state->core_clock_rate;
--
2.33.1