6.11-stable review patch. If anyone has any objections, please let me know.
------------------
From: Boris Brezillon <boris.brezillon@xxxxxxxxxxxxx>
commit 282864cc5d3f144af0cdea1868ee2dc2c5110f0d upstream.
The group variable can't be used to retrieve ptdev in our second loop,
because it points to the previously iterated list_head, not a valid
group. Get the ptdev object from the scheduler instead.
Cc: <stable@xxxxxxxxxxxxxxx>
Fixes: d72f049087d4 ("drm/panthor: Allow driver compilation")
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Reported-by: Julia Lawall <julia.lawall@xxxxxxxx>
Closes: https://lore.kernel.org/r/202409302306.UDikqa03-lkp@xxxxxxxxx/
Signed-off-by: Boris Brezillon <boris.brezillon@xxxxxxxxxxxxx>
Reviewed-by: Liviu Dudau <liviu.dudau@xxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20240930163742.87036-1-boris.brezillon@xxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/panthor/panthor_sched.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
--- a/drivers/gpu/drm/panthor/panthor_sched.c
+++ b/drivers/gpu/drm/panthor/panthor_sched.c
@@ -2046,6 +2046,7 @@ static void
tick_ctx_cleanup(struct panthor_scheduler *sched,
struct panthor_sched_tick_ctx *ctx)
{
+ struct panthor_device *ptdev = sched->ptdev;
struct panthor_group *group, *tmp;
u32 i;
@@ -2054,7 +2055,7 @@ tick_ctx_cleanup(struct panthor_schedule
/* If everything went fine, we should only have groups
* to be terminated in the old_groups lists.
*/
- drm_WARN_ON(&group->ptdev->base, !ctx->csg_upd_failed_mask &&
+ drm_WARN_ON(&ptdev->base, !ctx->csg_upd_failed_mask &&
group_can_run(group));
if (!group_can_run(group)) {
@@ -2077,7 +2078,7 @@ tick_ctx_cleanup(struct panthor_schedule
/* If everything went fine, the groups to schedule lists should
* be empty.
*/
- drm_WARN_ON(&group->ptdev->base,
+ drm_WARN_ON(&ptdev->base,
!ctx->csg_upd_failed_mask && !list_empty(&ctx->groups[i]));
list_for_each_entry_safe(group, tmp, &ctx->groups[i], run_node) {
