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panthor: save task pid and comm in panthor_group

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We would like to report them on gpu errors.

We choose to save the info on panthor_group_create rather than on
panthor_open because, when the two differ, we are more interested in the
task that created the group.

Signed-off-by: Chia-I Wu <olvaffe@gmail.com>
Reviewed-by: Steven Price <steven.price@arm.com>
Signed-off-by: Steven Price <steven.price@arm.com>
Link: https://lore.kernel.org/r/20250718063816.1452123-3-olvaffe@gmail.com
This commit is contained in:
Chia-I Wu 2025-07-17 23:38:15 -07:00 committed by Steven Price
parent 78ededb610
commit 33b9cb6dcd
1 changed files with 19 additions and 0 deletions
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19
drivers/gpu/drm/panthor/panthor_sched.c
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@ -641,6 +641,15 @@ struct panthor_group {
size_t kbo_sizes;
} fdinfo;
/** @task_info: Info of current->group_leader that created the group. */
struct {
/** @task_info.pid: pid of current->group_leader */
pid_t pid;
/** @task_info.comm: comm of current->group_leader */
char comm[TASK_COMM_LEN];
} task_info;
/** @state: Group state. */
enum panthor_group_state state;
@ -3389,6 +3398,14 @@ group_create_queue(struct panthor_group *group,
return ERR_PTR(ret);
}
static void group_init_task_info(struct panthor_group *group)
{
struct task_struct *task = current->group_leader;
group->task_info.pid = task->pid;
get_task_comm(group->task_info.comm, task);
}
static void add_group_kbo_sizes(struct panthor_device *ptdev,
struct panthor_group *group)
{
@ -3540,6 +3557,8 @@ int panthor_group_create(struct panthor_file *pfile,
add_group_kbo_sizes(group->ptdev, group);
spin_lock_init(&group->fdinfo.lock);
group_init_task_info(group);
return gid;
err_put_group: