Messages in this thread Patch in this message | | | Date | Thu, 19 Apr 2012 14:09:10 -0700 | From | Greg KH <> | Subject | [ 52/68] usb: gadget: pch_udc: Fix USB suspend issue |
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3.2-stable review patch. If anyone has any objections, please let me know.
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From: Tomoya MORINAGA <tomoya.rohm@gmail.com>
commit 84566abba058b2aae8d603dfa90b5a3778a6714f upstream.
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> Signed-off-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- drivers/usb/gadget/pch_udc.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-)
--- a/drivers/usb/gadget/pch_udc.c +++ b/drivers/usb/gadget/pch_udc.c @@ -2475,8 +2475,15 @@ static void pch_udc_dev_isr(struct pch_u 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");
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