gpu: host1x: Wait for timeout worker completion on channel free

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cdma_timeout_destroy() used cancel_delayed_work() to cancel pending
timeout work when destroying the CDMA. Usually this is fine, but
there is a narrow race condition where the timeout handler has started
execution but has not taken cdma->lock; the channel is freed causing
cdma_stop to take cdma->lock and flush the channel; host1x_cdma_deinit
then proceeds with deinitializing cdma while the handler is waiting to
take cdma->lock.

Therefore change cdma_timeout_destroy to use cancel_delayed_work_sync
instead to ensure any pending timeout work completes before proceeding.

Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://patch.msgid.link/20260609-b4-host1x-small-fixes-a-v1-1-7c1131c0b3ad@nvidia.com

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Mikko Perttunen 2026-06-09 17:09:17 +09:00 • committed by Thierry Reding

parent e5320be8a5

commit 7a39b9856a

1 changed files with 1 additions and 1 deletions

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drivers/gpu/host1x/hw/cdma_hw.c

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