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usb: musb: Fix PM runtime for disconnect after unconfigure 

If we unconfigure musb as a USB peripheral with cable connected,
and then remove the cable, no interrupts will happen. And musb
thinks we're still connected keeping the device active.

Now with the session bit based PM runtime working for musb, we
can fix this issue by calling musb irq_work. That rechecks the
devctl register and reconfigures PM runtime based on the devctl.

Fixes: 467d5c9807 ("usb: musb: Implement session bit based runtime PM for musb-core")
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Tony Lindgren 2016-09-22 15:58:29 -05:00 committed by Greg Kroah-Hartman
parent b36df0905e
commit 4e71918366
1 changed files with 3 additions and 0 deletions
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3
drivers/usb/musb/musb_gadget.c
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@ -1964,6 +1964,9 @@ static int musb_gadget_stop(struct usb_gadget *g)
* that currently misbehaves. * that currently misbehaves.
*/ */
/* Force check of devctl register for PM runtime */
schedule_work(&musb->irq_work);
pm_runtime_mark_last_busy(musb->controller); pm_runtime_mark_last_busy(musb->controller);
pm_runtime_put_autosuspend(musb->controller); pm_runtime_put_autosuspend(musb->controller);