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: cdc-acm: fix abnormal DATA RX issue for Mediatek Preloader. From: Johan Hovold Message-Id: <20181214110731.GC20658@localhost> Date: Fri, 14 Dec 2018 12:07:31 +0100 To: Macpaul Lin Cc: Johan Hovold , Oliver Neukum , Greg Kroah-Hartman , wsd_upstream@mediatek.com, linux-usb@vger.kernel.org List-ID: T24gRnJpLCBEZWMgMTQsIDIwMTggYXQgMTA6MDA6MTZBTSArMDgwMCwgTWFjcGF1bCBMaW4gd3Jv dGU6Cj4gT24gVGh1LCAyMDE4LTEyLTEzIGF0IDExOjE4ICswMTAwLCBKb2hhbiBIb3ZvbGQgd3Jv dGU6Cj4gPiBPbiBUaHUsIERlYyAxMywgMjAxOCBhdCAxMToxMzo1NEFNICswMTAwLCBPbGl2ZXIg TmV1a3VtIHdyb3RlOgo+ID4gPiBPbiBEbywgMjAxOC0xMi0xMyBhdCAxMDo0MyArMDEwMCwgSm9o YW4gSG92b2xkIHdyb3RlOgo+ID4gPiA+IE9uIFRodSwgRGVjIDEzLCAyMDE4IGF0IDExOjI3OjU2 QU0gKzA4MDAsIG1hY3BhdWwubGluQG1lZGlhdGVrLmNvbSB3cm90ZToKPiA+ID4gPiA+IEZyb206 IE1hY3BhdWwgTGluIDxtYWNwYXVsLmxpbkBtZWRpYXRlay5jb20+Cj4gPiA+ID4gPiAKPiA+ID4g PiA+ICsJLyogaGFuZGxlIGFjdGl2ZSBoYW5kc2hha2UgdHJpZ2dlcmVkIGJ5IGRldmljZSAqLwo+ ID4gPiA+ID4gKwlpZiAocXVpcmtzID09IERJU0FCTEVfRUNITykKPiA+ID4gPiA+ICsJCWFjbV90 dHlfZHJpdmVyLT5pbml0X3Rlcm1pb3MuY19sZmxhZyAmPSB+KEVDSE8pOwo+ID4gPiA+IAo+ID4g PiA+IFlvdSBjYW5ub3QgY2hhbmdlIHRoZSBkcml2ZXIgaW5pdF90ZXJtaW9zIGxpa2UgdGhpcyBh cyB0aGF0IHdpbGwgYWZmZWN0Cj4gPiA+ID4gYWxsIGNkYy1hY20gZGV2aWNlcyB0aGF0IGFyZSBw cm9iZWQgbGF0ZXIuIElmIHRoaXMgaXMgYXQgYWxsIG5lZWRlZCwKPiA+ID4gPiB0aGlzIHdpbGwg aGF2ZSB0byBiZSBkb25lIGF0IHR0eSBpbnN0YWxsIHRpbWUuCj4gPiA+IAo+ID4gPiBSaWdodC4g SG93IGRvIHdpdGggZGVjaWRlIG9uIGEgc2Vuc2libGUgZGVmYXVsdCBhbnl3YXk/Cj4gPiAKPiA+ IEkgdGhpbmsgdGhlIGN1cnJlbnQgZGVmYXVsdHMgYXJlIHNlbnNpYmxlLiBUaGV5IGFyZSBiYXNl ZCBvbgo+ID4gdHR5X3N0ZF90ZXJtaW9zLCB3aGljaCBoYXMgRUNITyBzZXQsIGFzIGZvciBtb3N0 IChhbGw/KSB0dHkgZHJpdmVycy4KCj4gV2VsbCwgdGhlIHByb2JsZW0gaXMgdGhhdCB0aGUgcGhv bmUgZGV2aWNlIChwcmVsb2FkZXIpIHdpbGwgZ2V0Cj4gIlJFQURZWFgiIGV2ZW4gIm5vIGFueSBk b3dubG9hZCB0b29sIGhhcyBldmVyIGJlZW4gbGF1bmNoZWQgb24gUEMiLgoKU29tZXRoaW5nIG11 Y2ggaG9sZCB0aGUgcG9ydCBvcGVuIG9uIHRoZSBob3N0IChQQykgc2lkZSBmb3IgaXQgdG8gYmUK ZWNob2VkIGJhY2ssIGJ1dCBwZXJoYXBzIHRoZSBvdXRnb2luZyBkYXRhIGlzIGJ1ZmZlcmVkIGlu IHRoZSBkZXZpY2UKdW50aWwgaXQgaXMgZXZlbnR1YWxseSBvcGVuZWQuCgo+IEFmdGVyIHRoZSBy ZXNldCB0ZXJtaW9zIHN0YXRlIGNoYW5nZSBzaW1wbHkgc2V0IEVIQ08gZW5hYmxlLCBlYWNoIHRp bWUKPiB0aGUgcGhvbmUgZGV2aWNlIHNpbXBsZSBzZW5kIG91dCAiUkVBRFkiIHRvIFBDIGFmdGVy IFVTQiBoYXMgYmVlbgo+IGNvbm5lY3RlZC4gVGhlICJSRUFEWSIgaW5kaWNhdGlvbiBoYXMgbm8g YW55ICJcMCIgY2hhcmFjdGVyIGF0IHRoZSBlbmQKPiBvZiB0aGUgY29tbWFuZCBzdHJpbmcsIGhl bmNlIGl0IHdpbGwgcmVjZWl2ZSBzb21lIGRpcnR5IGRhdGEgKGV4LiAKPiAiUkVBRFlYWCIpIGJh Y2sgb24gUlggcGF0aC4KClNvIHlvdSBoYXZlIGEgZmlybXdhcmUgYnVnIHdoaWNoIHNlbmRzIG91 dCBzb21lIGdhcmJhZ2UgY2hhcmFjdGVycwooIlhYIik/CgpFaXRoZXIgd2F5LCB5b3Ugc2hvdWxk IGhhdmUgaGl0IHRoaXMgYWxzbyBiZWZvcmUgdGhlIGNvbW1pdCB3aGljaApzdGFydGVkIHJlc2V0 dGluZyB0aGUgdGVybWluYWwgc2V0dGluZ3Mgd2hlbmV2ZXIgYSBkZXZpY2Ugd2FzIHBsdWdnZWQK aW4gaW5zdGVhZCBvZiByZXVzaW5nIGEgcG90ZW50aWFsbHkgcmFuZG9tIG90aGVyIGRldmljZSdz IHNldHRpbmdzLgoKSG93ZXZlciwgYWZ0ZXIgY2xlYXJpbmcgZWNobyBhbmQgcmVwbHVnZ2luZyB0 aGUgZGV2aWNlLCBub3RoaW5nIHdvdWxkCmhhdmUgYmVlbiBlY2hvZWQgYmFjayBvbiBuZXh0IG9w ZW4sIGJ1dCBvbmx5ICppZiogdGhlIGRldmljZSBoYXBwZW5lZCB0bwpiZSBhc3NpZ25lZCB0aGUg c2FtZSBtaW5vciBudW1iZXIuCgpCdXQgaWYgdGhpcyBjb25mdXNlcyB5b3VyIGZpcm13YXJlIGFu ZCB0aGVyZSdzIG5vIHdheSB0byByZXN0YXJ0IHRoZQpoYW5kc2hha2UgaW4geW91ciBob3N0IHRv b2wsIHBlcmhhcHMgY2xlYXJpbmcgRUNITyBhdCB0dHkgaW5zdGFsbCB0aW1lCihpLmUuIGluIHR0 eV9hY21faW5zdGFsbCgpKSBpcyB0aGUgb25seSB3YXkgdG8gZGVhbCB3aXRoIHRoaXMuCgpKb2hh bgo=