4.16-stable review patch. If anyone has any objections, please let me know.
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From: Mikita Lipski mikita.lipski@amd.com
commit ad64dc0137968f09800e58174bbfd5eac9fe5418 upstream.
Lock irq table when reading a work in queue, unlock to flush the work, lock again till all tasks are cleared
Signed-off-by: Mikita Lipski mikita.lipski@amd.com Reviewed-by: Harry Wentland Harry.Wentland@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_irq.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_irq.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_irq.c @@ -400,14 +400,15 @@ void amdgpu_dm_irq_fini(struct amdgpu_de { int src; struct irq_list_head *lh; + unsigned long irq_table_flags; DRM_DEBUG_KMS("DM_IRQ: releasing resources.\n"); - for (src = 0; src < DAL_IRQ_SOURCES_NUMBER; src++) { - + DM_IRQ_TABLE_LOCK(adev, irq_table_flags); /* The handler was removed from the table, * it means it is safe to flush all the 'work' * (because no code can schedule a new one). */ lh = &adev->dm.irq_handler_list_low_tab[src]; + DM_IRQ_TABLE_UNLOCK(adev, irq_table_flags); flush_work(&lh->work); }