Hello Adrián Larumbe,
Commit 434e5ca5b5d7 ("drm/panthor: Expose size of driver internal
BO's over fdinfo") from Jan 30, 2025 (linux-next), leads to the
following Smatch static checker warning:
drivers/gpu/drm/panthor/panthor_mmu.c:1968 panthor_vm_heaps_sizes()
warn: sleeping in atomic context
drivers/gpu/drm/panthor/panthor_mmu.c
1956 void panthor_vm_heaps_sizes(struct panthor_file *pfile, struct drm_memory_stats *stats)
1957 {
1958 struct panthor_vm *vm;
1959 unsigned long i;
1960
1961 if (!pfile->vms)
1962 return;
1963
1964 xa_lock(&pfile->vms->xa);
^^^^^^^
This is a spinlock.
1965 xa_for_each(&pfile->vms->xa, i, vm) {
1966 size_t size = 0;
1967
--> 1968 mutex_lock(&vm->heaps.lock);
^^^^^^^^^^
So we can't take a mutex if we're holding a spinlock.
1969 if (vm->heaps.pool)
1970 size = panthor_heap_pool_size(vm->heaps.pool);
1971 mutex_unlock(&vm->heaps.lock);
1972
1973 stats->resident += size;
1974 if (vm->as.id >= 0)
1975 stats->active += size;
1976 }
1977 xa_unlock(&pfile->vms->xa);
1978 }
regards,
dan carpenter
