linux-kernel - [PATCH 3/6] usb: s3c-hsotg: do not disconnect gadget when receiving ErlySusp intr

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Message-id: <1378995532-32142-4-git-send-email-r.baldyga@samsung.com>
Date:	Thu, 12 Sep 2013 16:18:49 +0200
From:	Robert Baldyga <r.baldyga@...sung.com>
To:	balbi@...com
Cc:	gregkh@...uxfoundation.org, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org, b.zolnierkie@...sung.com,
	m.szyprowski@...sung.com, Chanho Park <chanho61.park@...sung.com>,
	Robert Baldyga <r.baldyga@...sung.com>,
	Kyungmin Park <kyungmin.park@...sung.com>
Subject: [PATCH 3/6] usb: s3c-hsotg: do not disconnect gadget when receiving
 ErlySusp intr

From: Chanho Park <chanho61.park@...sung.com>

DWC2 databook indicates if the core sets "ErlySusp" bit, an idle state has been
detected on the USB for 3 ms. This situation can be occurred when waiting
a request from user daemon. So, we should keep the connection between udc and
gadget even though this interrupt is occurred.

Signed-off-by: Chanho Park <chanho61.park@...sung.com>
Signed-off-by: Robert Baldyga <r.baldyga@...sung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@...sung.com>
---
 drivers/usb/gadget/s3c-hsotg.c |    2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/usb/gadget/s3c-hsotg.c b/drivers/usb/gadget/s3c-hsotg.c
index b13a4f9..dd5524c 100644
--- a/drivers/usb/gadget/s3c-hsotg.c
+++ b/drivers/usb/gadget/s3c-hsotg.c
@@ -2474,8 +2474,6 @@ irq_retry:
 	if (gintsts & GINTSTS_ErlySusp) {
 		dev_dbg(hsotg->dev, "GINTSTS_ErlySusp\n");
 		writel(GINTSTS_ErlySusp, hsotg->regs + GINTSTS);
-
-		s3c_hsotg_disconnect(hsotg);
 	}
 
 	/*
-- 
1.7.9.5

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