linux-kernel - [PATCH 4.4 024/131] extcon: usb-gpio: Dont miss event during suspend/resume

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Message-Id: <20190401170054.044149101@linuxfoundation.org>
Date:   Mon,  1 Apr 2019 19:01:34 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Roger Quadros <rogerq@...com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Arnd Bergmann <arnd@...db.de>
Subject: [PATCH 4.4 024/131] extcon: usb-gpio: Dont miss event during suspend/resume

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Roger Quadros <rogerq@...com>

commit 04c080080855ce84dcd490a2e04805608a21085d upstream.

Pin state might have changed during suspend/resume while
our interrupts were disabled and if device doesn't support wakeup.

Scan for change during resume for such case.

Signed-off-by: Roger Quadros <rogerq@...com>
Signed-off-by: Chanwoo Choi <cw00.choi@...sung.com>
Signed-off-by: Arnd Bergmann <arnd@...db.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/extcon/extcon-usb-gpio.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/extcon/extcon-usb-gpio.c
+++ b/drivers/extcon/extcon-usb-gpio.c
@@ -192,6 +192,9 @@ static int usb_extcon_resume(struct devi
 	}
 
 	enable_irq(info->id_irq);
+	if (!device_may_wakeup(dev))
+		queue_delayed_work(system_power_efficient_wq,
+				   &info->wq_detcable, 0);
 
 	return ret;
 }