linux-kernel - [PATCH v3 7/9] usb: dwc3: gadget: Fix suspend/resume during dual-role mode

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Message-ID: <1436351828-28687-1-git-send-email-rogerq@ti.com>
Date:	Wed, 8 Jul 2015 13:37:08 +0300
From:	Roger Quadros <rogerq@...com>
To:	<balbi@...com>
CC:	<tony@...mide.com>, <Joao.Pinto@...opsys.com>,
	<linux-usb@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-omap@...r.kernel.org>, Roger Quadros <rogerq@...com>
Subject: [PATCH v3 7/9] usb: dwc3: gadget: Fix suspend/resume during dual-role mode

Gdget controller might not be always active during suspend/
resume when we are operating in dual-role/otg mode.
Check if we're active and only if we are then perform
necessary actions during suspend/resume.

Signed-off-by: Roger Quadros <rogerq@...com>
---
 drivers/usb/dwc3/gadget.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index cf6b945..3cc8c18 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -2779,6 +2779,9 @@ void dwc3_gadget_exit(struct dwc3 *dwc)
 
 int dwc3_gadget_suspend(struct dwc3 *dwc)
 {
+	if (!dwc->gadget_driver)
+		return 0;
+
 	if (dwc->pullups_connected) {
 		dwc3_gadget_disable_irq(dwc);
 		dwc3_gadget_run_stop(dwc, true, true);
@@ -2797,6 +2800,9 @@ int dwc3_gadget_resume(struct dwc3 *dwc)
 	struct dwc3_ep		*dep;
 	int			ret;
 
+	if (!dwc->gadget_driver)
+		return 0;
+
 	/* Start with SuperSpeed Default */
 	dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512);
 
-- 
2.1.4

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