diff options
| author | Li Jun <jun.li@freescale.com> | 2015-06-19 17:18:48 +0800 |
|---|---|---|
| committer | Li Jun <jun.li@freescale.com> | 2015-06-24 14:14:38 +0800 |
| commit | a1d10a86355d577232458eec3af09bfbc6e0772e (patch) | |
| tree | e84801bf85f1cd65c1b84a76e4409e0ee6b66b67 /drivers | |
| parent | e11c025aacd4debc591074324fa879a9c2b313f0 (diff) | |
MLK-11132 usb: chipidea: otg: delay suspend for a_wait_vfall
While A device as peripheral ends session by a_bus_drop, it will go
back to host role by transition to a_wait_vfall state, then ehci
host driver may access portsc status after controller enters suspend
, this will result in system hang since its clock is gated off.
This patch use existing autosuspend to delay the controller suspend
if it comes to a_wait_vfall state.
Signed-off-by: Li Jun <jun.li@freescale.com>
(cherry picked from commit b140fa6803ef6ececec17e435212a960a3169cc2)
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/chipidea/otg_fsm.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/usb/chipidea/otg_fsm.c b/drivers/usb/chipidea/otg_fsm.c index 1ccaf35eea5a..6e1070b19fed 100644 --- a/drivers/usb/chipidea/otg_fsm.c +++ b/drivers/usb/chipidea/otg_fsm.c @@ -889,7 +889,8 @@ int ci_otg_fsm_work(struct ci_hdrc *ci) */ ci_otg_queue_work(ci); } - } else if (ci->fsm.otg->state == OTG_STATE_A_HOST) { + } else if (ci->fsm.otg->state == OTG_STATE_A_HOST || + ci->fsm.otg->state == OTG_STATE_A_WAIT_VFALL) { pm_runtime_mark_last_busy(ci->dev); pm_runtime_put_autosuspend(ci->dev); return 0; |