From: Heikki Krogerus <ext-heikki.krogerus@nokia.com>
Date: Fri, 24 Sep 2010 10:44:13 +0000 (+0300)
Subject: usb: musb: ignore spurious SESSREQ interrupts
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=a6038ee76a29ea31f8aae4eb6c419794c739e077;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

usb: musb: ignore spurious SESSREQ interrupts

This will ignore any SESSREQ interrupt if musb is B state.
Charger detection may cause spurious SESSREQ interrupts.

Signed-off-by: Heikki Krogerus <ext-heikki.krogerus@nokia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c
index d4f18bbc8f8f..472b2a7e7896 100644
--- a/drivers/usb/musb/musb_core.c
+++ b/drivers/usb/musb/musb_core.c
@@ -550,6 +550,11 @@ static irqreturn_t musb_stage0_irq(struct musb *musb, u8 int_usb,
 	if (int_usb & MUSB_INTR_SESSREQ) {
 		void __iomem *mbase = musb->mregs;
 
+		if (devctl & MUSB_DEVCTL_BDEVICE) {
+			DBG(3, "SessReq while on B state\n");
+			return IRQ_HANDLED;
+		}
+
 		DBG(1, "SESSION_REQUEST (%s)\n", otg_state_string(musb));
 
 		/* IRQ arrives from ID pin sense or (later, if VBUS power