Hi,

On running a suspend/resume stress test, after a few hundred runs, I see that resume takes a longer time (~40 sec) because of HDA audio (00:03 is the audio device in the system) . HDA audio takes around 35 sec to resume in the following case.

dmesg:

...

...

2015-01-11T05:43:39.993107+08:00 kernel: [46300.269994] call 0000:00:03.0+ returned 0 after 35524554 usecs

...

...

2015-01-11T05:43:39.993109+08:00 kernel: [46300.270033] PM: Wakeup pending, aborting suspend

Can anyone help understand why would HDA audio take so long to resume sporadically?

-Harsha