From mboxrd@z Thu Jan 1 00:00:00 1970 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Subject: [v5,4/6] usb: gadget: add mechanism to specify an explicit status stage From: Paul Elder Message-Id: <20190111082340.GB32268@localhost.localdomain> Date: Fri, 11 Jan 2019 03:23:40 -0500 To: Alan Stern Cc: laurent.pinchart@ideasonboard.com, kieran.bingham@ideasonboard.com, b-liu@ti.com, rogerq@ti.com, balbi@kernel.org, gregkh@linuxfoundation.org, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org List-ID: T24gV2VkLCBKYW4gMDksIDIwMTkgYXQgMDI6MDY6MzFQTSAtMDUwMCwgQWxhbiBTdGVybiB3cm90 ZToKPiBPbiBXZWQsIDkgSmFuIDIwMTksIFBhdWwgRWxkZXIgd3JvdGU6Cj4gCj4gPiBBIHVzYiBn YWRnZXQgZnVuY3Rpb24gZHJpdmVyIG1heSBvciBtYXkgbm90IHdhbnQgdG8gZGVsYXkgdGhlIHN0 YXR1cwo+ID4gc3RhZ2Ugb2YgYSBjb250cm9sIE9VVCByZXF1ZXN0LiBBbiBpbnN0YW5jZSB3aGVy ZSBpdCBtaWdodCB3YW50IHRvIGlzIHRvCj4gPiBhc3luY2hyb25vdXNseSB2YWxpZGF0ZSB0aGUg ZGF0YSBvZiBhIGNsYXNzLXNwZWNpZmljIHJlcXVlc3QuCj4gPiAKPiA+IEEgZnVuY3Rpb24gZHJp dmVyIHRoYXQgd2FudHMgYW4gZXhwbGljaXQgc3RhdHVzIHN0YWdlIHNob3VsZCBzZXQgdGhlCj4g PiBuZXdseSBhZGRlZCBleHBsaWNpdF9zdGF0dXMgZmxhZyBvZiB0aGUgdXNiX3JlcXVlc3QgY29y cmVzcG9uZGluZyB0byB0aGUKPiA+IGRhdGEgc3RhZ2UuIExhdGVyIG9uLCB0aGUgZnVuY3Rpb24g ZHJpdmVyIGNhbiBleHBsaWNpdGx5IGNvbXBsZXRlIHRoZQo+ID4gc3RhdHVzIHN0YWdlIGJ5IGVu cXVldWVpbmcgYSB1c2JfcmVxdWVzdCBmb3IgQUNLLCBvciBjYWxsaW5nCj4gPiB1c2JfZXBfc2V0 X2hhbHQoKSBmb3IgU1RBTEwuCj4gPiAKPiA+IFRvIHN1cHBvcnQgYm90aCBleHBsaWNpdCBhbmQg aW1wbGljaXQgc3RhdHVzIHN0YWdlcywgYSBVREMgZHJpdmVyIG11c3QKPiA+IGNhbGwgdGhlIG5l d2x5IGFkZGVkIHVzYl9nYWRnZXRfY29udHJvbF9jb21wbGV0ZSBmdW5jdGlvbiByaWdodCBiZWZv cmUKPiA+IGNhbGxpbmcgdXNiX2dhZGdldF9naXZlYmFja19yZXF1ZXN0LiBUbyBzdXBwb3J0IHRo ZSBleHBsaWNpdCBzdGF0dXMKPiA+IHN0YWdlLCBpdCBtaWdodCB0aGVuIGNoZWNrIHdoYXQgc3Rh Z2UgdGhlIHVzYl9yZXF1ZXN0IHdhcyBxdWV1ZWQgaW4sIGFuZAo+ID4gZm9yIGNvbnRyb2wgSU4g QUNLIHRoZSBob3N0J3MgemVyby1sZW5ndGggZGF0YSBwYWNrZXQsIG9yIGZvciBjb250cm9sCj4g PiBPVVQgc2VuZCBhIHplcm8tbGVuZ3RoIERBVEExIEFDSyBwYWNrZXQuCj4gPiAKPiA+IFNpZ25l ZC1vZmYtYnk6IFBhdWwgRWxkZXIgPHBhdWwuZWxkZXJAaWRlYXNvbmJvYXJkLmNvbT4KPiA+IHY0 IEFja2VkLWJ5OiBBbGFuIFN0ZXJuIDxzdGVybkByb3dsYW5kLmhhcnZhcmQuZWR1Pgo+ID4gdjEg UmV2aWV3ZWQtYnk6IExhdXJlbnQgUGluY2hhcnQgPGxhdXJlbnQucGluY2hhcnRAaWRlYXNvbmJv YXJkLmNvbT4KPiAKPiBUaGlzIGxvb2tzIGdvb2QgYW5kIGhhcyBwYXNzZWQgbXkgdGVzdHMgc28g ZmFyLgoKR29vZCEgVGhhbmsgeW91IDopCgo+IENhbiB5b3UgY2hlY2sgeW91ciB1dmMKPiBjaGFu Z2VzIHVzaW5nIGR1bW15X2hjZCB3aXRoIHRoZSBwYXRjaCBiZWxvdz8KCkknbSBub3Qgc3VyZSB3 aGF0IHRvIG1ha2Ugb2YgdGhlIHRlc3QgcmVzdWx0cy4gSSBnZXQgdGhlIHNhbWUgcmVzdWx0cwp3 aXRoIG9yIHdpdGhvdXQgdGhlIHBhdGNoLiBXaGljaCBJIGd1ZXNzIG1ha2VzIHNlbnNlLi4uIGlu IGR1bW15X3F1ZXVlLAp0aGlzIGlzIGdldHRpbmcgaGl0IHdoZW4gdGhlIHV2YyBmdW5jdGlvbiBk cml2ZXIgdHJpZXMgdG8gY29tcGxldGUgdGhlCmRlbGF5ZWQgc3RhdHVzOgoKCXJlcSA9IHVzYl9y ZXF1ZXN0X3RvX2R1bW15X3JlcXVlc3QoX3JlcSk7CglpZiAoIV9yZXEgfHwgIWxpc3RfZW1wdHko JnJlcS0+cXVldWUpIHx8ICFfcmVxLT5jb21wbGV0ZSkKCQlyZXR1cm4gLUVJTlZBTDsKClNvIHRo ZSBkZWxheWVkL2V4cGxpY2l0IHN0YXR1cyBzdGFnZSBpcyBuZXZlciBjb21wbGV0ZWQsIGFmYWlj dC4KClBhdWwK