When device is stopped, there is no need to handle ISR.
Especially when otg switch to HOST mode.
Signed-off-by: Neil Zhang <zhangwm@xxxxxxxxxxx>
---
drivers/usb/gadget/mv_udc.h | 3 ++-
drivers/usb/gadget/mv_udc_core.c | 8 ++++++++
2 files changed, 10 insertions(+), 1 deletions(-)
diff --git a/drivers/usb/gadget/mv_udc.h b/drivers/usb/gadget/mv_udc.h
index b2c36ee..3d84044 100644
--- a/drivers/usb/gadget/mv_udc.h
+++ b/drivers/usb/gadget/mv_udc.h
@@ -211,7 +211,8 @@ struct mv_udc {
softconnected:1,
force_fs:1,
clock_gating:1,
- active:1;
+ active:1,
+ stopped:1; /* stop bit is setted */
struct work_struct vbus_work;
struct workqueue_struct *qwork;
diff --git a/drivers/usb/gadget/mv_udc_core.c b/drivers/usb/gadget/mv_udc_core.c
index c7c0bfa..e852f9d 100644
--- a/drivers/usb/gadget/mv_udc_core.c
+++ b/drivers/usb/gadget/mv_udc_core.c
@@ -1056,6 +1056,8 @@ static void udc_stop(struct mv_udc *udc)
USBINTR_PORT_CHANGE_DETECT_EN | USBINTR_RESET_EN);
writel(tmp, &udc->op_regs->usbintr);
+ udc->stopped = 1;
+
/* Reset the Run the bit in the command register to stop VUSB */
tmp = readl(&udc->op_regs->usbcmd);
tmp &= ~USBCMD_RUN_STOP;
@@ -1072,6 +1074,8 @@ static void udc_start(struct mv_udc *udc)
/* Enable interrupts */
writel(usbintr, &udc->op_regs->usbintr);
+ udc->stopped = 0;
+
/* Set the Run bit in the command register */
writel(USBCMD_RUN_STOP, &udc->op_regs->usbcmd);
}
@@ -2040,6 +2044,10 @@ static irqreturn_t mv_udc_irq(int irq, void *dev)
struct mv_udc *udc = (struct mv_udc *)dev;
u32 status, intr;
+ /* Disable ISR when stopped bit is set */
+ if (udc->stopped)
+ return IRQ_NONE;
+
spin_lock(&udc->lock);
status = readl(&udc->op_regs->usbsts);
--
1.7.4.1
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