From mboxrd@z Thu Jan 1 00:00:00 1970 From: chunfeng.yun@mediatek.com (Chunfeng Yun) Date: Fri, 7 Sep 2018 16:43:46 +0800 Subject: [PATCH v2] usb: xhci: fix interrupt transfer error happened on MTK platforms In-Reply-To: <20180907074251.GA2079@kroah.com> References: <20180907074251.GA2079@kroah.com> Message-ID: <1536309826.32173.45.camel@mhfsdcap03> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Hi, On Fri, 2018-09-07 at 09:42 +0200, Greg Kroah-Hartman wrote: > On Fri, Sep 07, 2018 at 03:29:12PM +0800, Chunfeng Yun wrote: > > The MTK xHCI controller use some reserved bytes in endpoint context for > > bandwidth scheduling, so need keep them in xhci_endpoint_copy(); > > If they are "reserved" shouldn't they be properly named? And by using > reserved bytes, isn't that a spec violation? It indeed violates the spec, "they shall be treated by system software as Reserved and Opaque", and it's a quirk of the MTK xHCI controller. > > thanks, > > greg k-h