diff options
| author | Li Jun <jun.li@nxp.com> | 2017-07-19 01:18:19 +0800 |
|---|---|---|
| committer | Li Jun <jun.li@nxp.com> | 2017-07-20 00:01:08 +0800 |
| commit | 3d5245b0a71b1bec488d349bdaa098ae59a6ab90 (patch) | |
| tree | 7f024978e88cb5e51e4a6b3ea1d338f54fdf7790 /drivers | |
| parent | e403b318e3140495599331d669a67afabb9c5e88 (diff) | |
MLK-15984 usb: chipidea: wait controller resume finished for wakeup irq
After the chipidea driver introduce extcon for id and vbus, it's able
to wakeup from another irq source, in case the system with extcon ID
cable, wakeup from usb ID cable and device removal, the usb device
disconnect irq may come firstly before the extcon notifier while system
resume, so we will get 2 "wakeup" irq, one for usb device disconnect;
and one for extcon ID cable change(real wakeup event), current driver
treat them as 2 successive wakeup irq so can't handle it correctly, then
finially the usb irq can't be enabled. This patch adds a check to bypass
further usb events before controller resume finished to fix it.
Reviewed-by: Peter Chen <peter.chen@nxp.com>
Signed-off-by: Li Jun <jun.li@nxp.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/chipidea/core.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/usb/chipidea/core.c b/drivers/usb/chipidea/core.c index 0fb156d82bfd..08a468683e0a 100644 --- a/drivers/usb/chipidea/core.c +++ b/drivers/usb/chipidea/core.c @@ -523,6 +523,13 @@ static irqreturn_t ci_irq(int irq, void *data) u32 otgsc = 0; if (ci->in_lpm) { + /* + * If we already have a wakeup irq pending there, + * let's just return to wait resume finished firstly. + */ + if (ci->wakeup_int) + return IRQ_HANDLED; + disable_irq_nosync(irq); ci->wakeup_int = true; pm_runtime_get(ci->dev); |