Hi Sean,
On 09/28/2017 04:27 AM, Sean Paul wrote:
>> >@@ -299,6 +300,7 @@ static int rockchip_drm_sys_resume(struct device *dev)
>> >
>> > priv = drm->dev_private;
>> > drm_atomic_helper_resume(drm, priv->state);
>> >+ drm_atomic_state_put(priv->state);
> Won't this be freed for you eventually in commit_tail()?
>
i think the drm_atomic_state_put in commit_tail is paired to the
drm_atomic_state_get in drm_atomic_helper_commit.
and the kmemleak shows(after a few suspend/resume):
unreferenced object 0xffffffc0ce0fa400 (size 256):
...
backtrace:
[<ffffffc00034a9a8>] __save_stack_trace+0x48/0x6c
[<ffffffc00034b088>] create_object+0x138/0x254
[<ffffffc0009d5504>] kmemleak_alloc+0x58/0x8c
[<ffffffc000345f78>] __kmalloc+0x1d4/0x2a0
[<ffffffc0006765bc>] usb_alloc_urb+0x30/0x60
[<ffffffbffc128598>] alloc_ctrl_urb+0x38/0x120 [btusb]
[<ffffffbffc129e7c>] btusb_send_frame+0x64/0xf8 [btusb]
checking the current code, i saw only i915/intel_display.c has this
drm_atomic_state_put for the state allocated by
drm_atomic_helper_suspend(), there're many drivers missing that(or maybe
they free it in some other way?)
> Sean
>
