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Date: Thu, 19 Apr 2012 14:06:49 -0700 From: Greg KH <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org Cc: torvalds@...ux-foundation.org, akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk, Tomoya MORINAGA <tomoya.rohm@...il.com>, Felipe Balbi <balbi@...com> Subject: [ 38/59] usb: gadget: pch_udc: Fix disconnect issue 3.0-stable review patch. If anyone has any objections, please let me know. ------------------ From: Tomoya MORINAGA <tomoya.rohm@...il.com> commit c50a3bff0edb0acd49d8033a12ea4668e09a31ad upstream. ISSUE: When the driver notifies a gadget of a disconnect event, a system rarely freezes. CAUSE: When the driver calls dev->driver->disconnect(), it is not calling spin_unlock(). Signed-off-by: Tomoya MORINAGA <tomoya.rohm@...il.com> Signed-off-by: Felipe Balbi <balbi@...com> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org> --- drivers/usb/gadget/pch_udc.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) --- a/drivers/usb/gadget/pch_udc.c +++ b/drivers/usb/gadget/pch_udc.c @@ -2338,8 +2338,11 @@ static void pch_udc_svc_ur_interrupt(str /* Complete request queue */ empty_req_queue(ep); } - if (dev->driver && dev->driver->disconnect) + if (dev->driver && dev->driver->disconnect) { + spin_unlock(&dev->lock); dev->driver->disconnect(&dev->gadget); + spin_lock(&dev->lock); + } } /** -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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