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| author | Bin Liu <b-liu@ti.com> | 2015-02-03 11:02:10 -0600 |
|---|---|---|
| committer | Felipe Balbi <balbi@ti.com> | 2015-02-04 11:16:47 -0600 |
| commit | 9298b4aad37e8c6962edcdbd0b62620adb207d03 (patch) | |
| tree | 485a90278ff48819369d9cd553854a0cd1d69926 | |
| parent | 251a17f5aff990ab117590df2a13ef032464c0d3 (diff) | |
| download | linux-stable-9298b4aad37e8c6962edcdbd0b62620adb207d03.tar.gz linux-stable-9298b4aad37e8c6962edcdbd0b62620adb207d03.tar.bz2 linux-stable-9298b4aad37e8c6962edcdbd0b62620adb207d03.zip | |
usb: musb: fix device hotplug behind hub
The commit 889ad3b "usb: musb: try a race-free wakeup" breaks device
hotplug enumeraitonn when the device is connected behind a hub while usb
autosuspend is enabled.
Adding finish_resume_work into runtime resume callback fixes the issue.
Also resume root hub is required to resume the bus from runtime suspend,
so move musb_host_resume_root_hub() back to its original location, where
handles RESUME interrupt.
Signed-off-by: Bin Liu <b-liu@ti.com>
Tested-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
| -rw-r--r-- | drivers/usb/musb/musb_core.c | 7 | ||||
| -rw-r--r-- | drivers/usb/musb/musb_virthub.c | 1 |
2 files changed, 7 insertions, 1 deletions
diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c index 34cce3e38c49..e6f4cbfeed97 100644 --- a/drivers/usb/musb/musb_core.c +++ b/drivers/usb/musb/musb_core.c @@ -567,6 +567,7 @@ static irqreturn_t musb_stage0_irq(struct musb *musb, u8 int_usb, musb->xceiv->otg->state = OTG_STATE_A_HOST; musb->is_active = 1; + musb_host_resume_root_hub(musb); break; case OTG_STATE_B_WAIT_ACON: musb->xceiv->otg->state = OTG_STATE_B_PERIPHERAL; @@ -2500,6 +2501,12 @@ static int musb_runtime_resume(struct device *dev) musb_restore_context(musb); first = 0; + if (musb->need_finish_resume) { + musb->need_finish_resume = 0; + schedule_delayed_work(&musb->finish_resume_work, + msecs_to_jiffies(20)); + } + return 0; } diff --git a/drivers/usb/musb/musb_virthub.c b/drivers/usb/musb/musb_virthub.c index 662de58630e9..294e159f4afe 100644 --- a/drivers/usb/musb/musb_virthub.c +++ b/drivers/usb/musb/musb_virthub.c @@ -72,7 +72,6 @@ void musb_host_finish_resume(struct work_struct *work) musb->xceiv->otg->state = OTG_STATE_A_HOST; spin_unlock_irqrestore(&musb->lock, flags); - musb_host_resume_root_hub(musb); } void musb_port_suspend(struct musb *musb, bool do_suspend) |