4.19-stable review patch. If anyone has any objections, please let me know.
------------------
From: Xu Yang xu.yang_2@nxp.com
commit 128d849074d05545becf86e713715ce7676fc074 upstream.
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 finally the usb irq can't be enabled. This patch adds a check to bypass further usb events before controller resume finished to fix it.
Fixes: 1f874edcb731 ("usb: chipidea: add runtime power management support") cc: stable@vger.kernel.org Acked-by: Peter Chen peter.chen@kernel.org Signed-off-by: Xu Yang xu.yang_2@nxp.com Signed-off-by: Li Jun jun.li@nxp.com Link: https://lore.kernel.org/r/20231228110753.1755756-2-xu.yang_2@nxp.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/usb/chipidea/core.c | 7 +++++++ 1 file changed, 7 insertions(+)
--- a/drivers/usb/chipidea/core.c +++ b/drivers/usb/chipidea/core.c @@ -539,6 +539,13 @@ static irqreturn_t ci_irq_handler(int ir 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);