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    Subject[PATCH 3/6 v2] usb/gadget/pch_udc: Fix USB suspend issue
    Date
    ISSUE:
    After USB Suspend, a system rarely freezes.

    CAUSE:
    When USB Suspend occurred, the driver is not notifying a gadget of the event.

    Signed-off-by: Tomoya MORINAGA <tomoya.rohm@gmail.com>
    ---
    V2: Divide into 6 patches
    ---
    drivers/usb/gadget/pch_udc.c | 9 ++++++++-
    1 files changed, 8 insertions(+), 1 deletions(-)

    diff --git a/drivers/usb/gadget/pch_udc.c b/drivers/usb/gadget/pch_udc.c
    index 78a2fce..6cd9e21 100644
    --- a/drivers/usb/gadget/pch_udc.c
    +++ b/drivers/usb/gadget/pch_udc.c
    @@ -2480,8 +2480,15 @@ static void pch_udc_dev_isr(struct pch_udc_dev *dev, u32 dev_intr)
    if (dev_intr & UDC_DEVINT_SC)
    pch_udc_svc_cfg_interrupt(dev);
    /* USB Suspend interrupt */
    - if (dev_intr & UDC_DEVINT_US)
    + if (dev_intr & UDC_DEVINT_US) {
    + if (dev->driver
    + && dev->driver->suspend) {
    + spin_unlock(&dev->lock);
    + dev->driver->suspend(&dev->gadget);
    + spin_lock(&dev->lock);
    + }
    dev_dbg(&dev->pdev->dev, "USB_SUSPEND\n");
    + }
    /* Clear the SOF interrupt, if enabled */
    if (dev_intr & UDC_DEVINT_SOF)
    dev_dbg(&dev->pdev->dev, "SOF\n");
    --
    1.7.4.4


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