4.16-stable review patch. If anyone has any objections, please let me know.
------------------
From: Mikita Lipski <mikita.lipski@xxxxxxx>
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@xxxxxxx>
Reviewed-by: Harry Wentland <Harry.Wentland@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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);
}
