tree 65097a78cd86008bb57f50fe790f326abd28338d
parent e980f66b5f6cb5a0896289cc9a5a3f510b693dd3
author Mayank Rana <mrana@codeaurora.org> 1534957965 -0700
committer Sriharsha Allenki <sallenki@codeaurora.org> 1537782331 +0530

usb: f_gsi: Resume USB on handling disconnect event in suspend state

Currently USB GSI function driver releases pm runtime usage count and
child count on receiving suspend event i.e. it doesn't prevent USB going
into LPM. There is race condition seen while USB going into LPM in
parallel USB GSI driver is trying to free allocated TRB ring. Due to USB
SMMU usage, it is must to have USB SMMU attach while freeing TRB ring.
Hence fix this issue by incrementing pm runtime usage count and child
count when handling disconnect event while USB GSI state is suspended
before trying to free TRB ring.

Change-Id: Icd9d43a6cd8956a1bdca219ad9686a57e89989c8
Signed-off-by: Mayank Rana <mrana@codeaurora.org>