drm/amdkfd: Fix race in GWS queue scheduling

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commit cfb05257ae upstream.

q->gws is not updated atomically with qpd->mapped_gws_queue. If a
runlist is created between pqm_set_gws and update_queue it will
contain a queue which uses GWS in a process with no GWS allocated.
This will result in a scheduler hang.

Use q->properties.is_gws which is changed while holding the DQM lock.

Signed-off-by: Jay Cornwall <jay.cornwall@amd.com>
Reviewed-by: Harish Kasiviswanathan <Harish.Kasiviswanathan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit b98370220e)
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Jay Cornwall 2025-06-11 09:52:14 -05:00 • committed by Greg Kroah-Hartman

parent 1847ea44e3

commit b681e2a8a7

1 changed files with 1 additions and 1 deletions

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drivers/gpu/drm/amd/amdkfd/kfd_packet_manager_v9.c

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