During GPU reset, when receiving a DMCUB OUTBUX0 interrupt, DAL code will set it to be OUTBOX interrupt and sets hw interrupt. However, OUTBOX interrupt is not registered yet, so a NULL pointer access will be executed. Call Trace: dal_irq_service_set+0x30/0x90 [amdgpu] dc_interrupt_set+0x24/0x30 [amdgpu] amdgpu_dm_set_dmub_outbox_irq_state+0x22/0x30 [amdgpu] amdgpu_irq_update+0x77/0xa0 [amdgpu] amdgpu_irq_gpu_reset_resume_helper+0x67/0xa0 [amdgpu] amdgpu_do_asic_reset+0x219/0x260 [amdgpu] amdgpu_device_gpu_recover.cold+0x8c5/0xb64 [amdgpu] amdgpu_debugfs_gpu_recover_show+0x2c/0x60 [amdgpu] seq_read_iter+0xc2/0x450 ? do_anonymous_page+0x22c/0x3b0 seq_read+0xf9/0x140 full_proxy_read+0x5c/0x90 vfs_read+0xaa/0x190 ksys_read+0x67/0xe0 __x64_sys_read+0x1a/0x20 Fixes: 85465bd6dc6e drm/amdgpu/display: remove an old DCN3 guard Signed-off-by: Guchun Chen <guchun.chen@xxxxxxx> --- drivers/gpu/drm/amd/display/dc/irq/irq_service.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/amd/display/dc/irq/irq_service.c b/drivers/gpu/drm/amd/display/dc/irq/irq_service.c index 5f245bde54ff..a2a4fbeb83f8 100644 --- a/drivers/gpu/drm/amd/display/dc/irq/irq_service.c +++ b/drivers/gpu/drm/amd/display/dc/irq/irq_service.c @@ -119,7 +119,7 @@ bool dal_irq_service_set( dal_irq_service_ack(irq_service, source); - if (info->funcs->set) + if (info->funcs && info->funcs->set) return info->funcs->set(irq_service, info, enable); dal_irq_service_set_generic(irq_service, info, enable); @@ -153,7 +153,7 @@ bool dal_irq_service_ack( return false; } - if (info->funcs->ack) + if (info->funcs && info->funcs->ack) return info->funcs->ack(irq_service, info); dal_irq_service_ack_generic(irq_service, info); -- 2.17.1 _______________________________________________ amd-gfx mailing list amd-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/amd-gfx
