usb: musb: Fix handling of spurious SESSREQ

Rely on VBUS being valid on top off B device.

Signed-off-by: Heikki Krogerus <heikki.krogerus@nokia.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c
index 78277170275b..e6669fc3b804 100644
--- a/drivers/usb/musb/musb_core.c
+++ b/drivers/usb/musb/musb_core.c
@@ -552,7 +552,8 @@ 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) {
+                if ((devctl & MUSB_DEVCTL_VBUS) == MUSB_DEVCTL_VBUS
+                                && (devctl & MUSB_DEVCTL_BDEVICE)) {
                         DBG(3, "SessReq while on B state\n");
                         return IRQ_HANDLED;
                 }