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Date: Mon, 6 Jan 2014 19:53:12 -0800 From: Greg KH <gregkh@...uxfoundation.org> To: 沈光 <shenguang10@...il.com> Cc: Sarah Sharp <sarah.a.sharp@...ux.intel.com>, linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH] usb:hub set hub->change_bits when over-current happens On Tue, Jan 07, 2014 at 11:35:50AM +0800, 沈光 wrote: > On Tue, Jan 7, 2014 at 10:40 AM, Greg KH <gregkh@...uxfoundation.org> wrote: > > On Tue, Jan 07, 2014 at 10:33:14AM +0800, 沈光 wrote: > >> set hub->change_bits when we plug in a device which causes > >> over-current condition, so that hub_events() will check it. > > > > Why? > > > > What does this solve? Is this a bug with existing devices that needs to > > be backported to older kernels? > > > > thanks, > > > > greg k-h > > This is something that we found when we are doing compliance test with xHCI. > If we enable CONFIG_USB_SUSPEND, and plug in a bad device which causes > over-current condition to the root port, the hub->change_bits will not > be set in current code in the function of hub_activate. Now that's something that should go in the changelog, don't you think? thanks, greg k-h -- 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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