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: <20181213094327.GJ3500@localhost> Date: Thu, 13 Dec 2018 10:43:27 +0100 To: macpaul.lin@mediatek.com Cc: linux-usb@vger.kernel.org, Oliver Neukum , Greg Kroah-Hartman , Johan Hovold , wsd_upstream@mediatek.com List-ID: T24gVGh1LCBEZWMgMTMsIDIwMTggYXQgMTE6Mjc6NTZBTSArMDgwMCwgbWFjcGF1bC5saW5AbWVk aWF0ZWsuY29tIHdyb3RlOgo+IEZyb206IE1hY3BhdWwgTGluIDxtYWNwYXVsLmxpbkBtZWRpYXRl ay5jb20+Cj4gCj4gTWVkaWF0ZWsgUHJlbG9hZGVyIGlzIGEgcHJvcHJpZXRhcnkgZW1iZWRkZWQg Ym9vdCBsb2FkZXIgZm9yIGxvYWRpbmcKPiBMaXR0bGUgS2VybmVsIGFuZCBMaW51eCBpbnRvIGRl dmljZSBEUkFNLgo+IAo+IFRoaXMgYm9vdCBsb2FkZXIgYWxzbyBoYW5kbGUgZmlybXdhcmUgdXBk YXRpbmcuIE1lZGlhdGVrIFByZWxvYWRlciB3aWxsIGJlCj4gZW51bWVyYXRlZCBhcyBhIHZpcnR1 YWwgQ09NIHBvcnQgd2hlbiB0aGUgZGV2aWNlIGlzIGNvbm5lY3RlZCB0byBXaW5kb3dzCj4gb3Ig TGludXggT1MgdmlhIENEQy1BQ00gY2xhc3MgZHJpdmVyLiBXaGVuIHRoZSBlbnVtZXJhdGlvbiBo YXMgYmVlbiBkb25lLAo+IE1lZGlhdGVrIFByZWxvYWRlciB3aWxsIHNlbmQgb3V0IGhhbmRzaGFr ZSBjb21tYW5kICJSRUFEWSIgdG8gUEMgYWN0aXZlbHkKPiBpbnN0ZWFkIG9mIHdhaXRpbmcgY29t bWFuZCBmcm9tIHRoZSBkb3dubG9hZCB0b29sLgo+IFNpbmNlIExpbnV4IDQuMTIsIHRoZSBjb21t aXQgInR0eTogcmVzZXQgdGVybWlvcyBzdGF0ZSBvbiBkZXZpY2UKPiByZWdpc3RyYXRpb24iICg5 Mzg1N2VkZDk4MjllMTQ0YWNiNmM3ZTcyZDU5M2Y2ZTAxYWVhZDY2KSBjYXVzZXMgTWVkaWF0ZWsK PiBQcmVsb2FkZXIgcmVjZWl2aW5nIHNvbWUgYWJub3JhbWwgY29tbWFuZCBsaWtlICJSRUFEWVhY IiBhcyBpdCBzZW5kZWQuCj4gV2hpY2ggd2lsbCBiZSByZWNvZ25pemVkIGFzIGFuIGluY29ycmVj dCByZXNwb25zZS4gVGhpcyBiZWhhdmlvciBjaGFuZ2UKPiBhbHNvIGNhdXNlcyB0aGUgaGFuZHNo YWtlIGZhaWwuCj4gCj4gQnkgZGlzYWJsaW5nIHRoZSBFQ0hPIHRlcm1pb3MgZmxhZyBjb3VsZCBh dm9pZCB0aGlzIHByb2JsZW0uIEhvd2V2ZXIsIGl0Cj4gY2Fubm90IGJlIGRvbmUgYnkgdXNlciBz cGFjZSBjb25maWd1cmF0aW9uIHdoZW4gZG93bmxvYWQgdG9vbCBvcGVuCj4gL2Rldi90dHlBQ00w LiBUaGlzIGlzIGJlY2F1c2UgdGhlIGRldmljZSBydW5uaW5nIE1lZGlhdGVrIFByZWxvYWRlciB3 aWxsCj4gc2VuZCBoYW5kc2hha2UgY29tbWFuZCAiUkVBRFkiIGltbWVkaWF0ZWx5IG9uY2UgdGhl IENEQy1BQ00gZHJpdmVyIGlzCj4gcmVhZHkuCj4gCj4gVGhpcyBwYXRjaCB3YW50cyB0byBmaXgg YWJvdmUgcHJvYmxlbSBieSBpbnRyb2R1Y2luZyAiRElTQUJMRV9FQ0hPIgo+IHByb3BlcnR5IGlu IGRyaXZlcl9pbmZvLiBXaGVuIE1lZGlhdGVrIFByZWxvYWRlciBpcyBjb25uZWN0ZWQsIHRoZQo+ IENEQy1BQ00gZHJpdmVyIGNvdWxkIGRpc2FibGUgRUNITyBmbGFnIGluIHRlcm1pb3MgdG8gYXZv aWQgdGhlIHByb2JsZW0uCj4gCj4gU2lnbmVkLW9mZi1ieTogTWFjcGF1bCBMaW4gPG1hY3BhdWwu bGluQG1lZGlhdGVrLmNvbT4KPiAtLS0KPiAgZHJpdmVycy91c2IvY2xhc3MvY2RjLWFjbS5jIHwg OSArKysrKysrKy0KPiAgZHJpdmVycy91c2IvY2xhc3MvY2RjLWFjbS5oIHwgMSArCj4gIDIgZmls ZXMgY2hhbmdlZCwgOSBpbnNlcnRpb25zKCspLCAxIGRlbGV0aW9uKC0pCj4gCj4gZGlmZiAtLWdp dCBhL2RyaXZlcnMvdXNiL2NsYXNzL2NkYy1hY20uYyBiL2RyaXZlcnMvdXNiL2NsYXNzL2NkYy1h Y20uYwo+IGluZGV4IDFiNjhmZWQuLjJmNzQ0YmIgMTAwNjQ0Cj4gLS0tIGEvZHJpdmVycy91c2Iv Y2xhc3MvY2RjLWFjbS5jCj4gKysrIGIvZHJpdmVycy91c2IvY2xhc3MvY2RjLWFjbS5jCj4gQEAg LTExNTYsNiArMTE1NiwxMCBAQCBzdGF0aWMgaW50IGFjbV9wcm9iZShzdHJ1Y3QgdXNiX2ludGVy ZmFjZSAqaW50ZiwKPiAgCQlnb3RvIHNraXBfbm9ybWFsX3Byb2JlOwo+ICAJfQo+ICAKPiArCS8q IGhhbmRsZSBhY3RpdmUgaGFuZHNoYWtlIHRyaWdnZXJlZCBieSBkZXZpY2UgKi8KPiArCWlmIChx dWlya3MgPT0gRElTQUJMRV9FQ0hPKQo+ICsJCWFjbV90dHlfZHJpdmVyLT5pbml0X3Rlcm1pb3Mu Y19sZmxhZyAmPSB+KEVDSE8pOwoKWW91IGNhbm5vdCBjaGFuZ2UgdGhlIGRyaXZlciBpbml0X3Rl cm1pb3MgbGlrZSB0aGlzIGFzIHRoYXQgd2lsbCBhZmZlY3QKYWxsIGNkYy1hY20gZGV2aWNlcyB0 aGF0IGFyZSBwcm9iZWQgbGF0ZXIuIElmIHRoaXMgaXMgYXQgYWxsIG5lZWRlZCwKdGhpcyB3aWxs IGhhdmUgdG8gYmUgZG9uZSBhdCB0dHkgaW5zdGFsbCB0aW1lLgoKTm90ZSB0aGF0IDkzODU3ZWRk OTgyOSAoInR0eTogcmVzZXQgdGVybWlvcyBzdGF0ZSBvbiBkZXZpY2UKcmVnaXN0cmF0aW9uIikg b25seSBtYWtlcyBzdXJlIHRoYXQgeW91IGdldCB0aGUgZGVmYXVsdCB0ZXJtaW5hbCBzZXR0aW5n CndoZW5ldmVyIHlvdSBwbHVnIGluIGEgZGV2aWNlIChyYXRoZXIgdGhhbiByZXVzZSBzZXR0aW5n cyBmcm9tIGEKcHJldmlvdXNseSBjb25uZWN0ZWQgZGV2aWNlIHdoaWNoIGhhcHBlbmVkIHRvIGJl IGFzc2lnbmVkIHRoZSBzYW1lIG1pbm9yCm51bWJlcikuIFNwZWNpZmljYWxseSwgaXQgc2hvdWxk IG5vdCBjaGFuZ2UgYW55IGJlaGF2aW91ciBmb3IgdGhlIGZpcnN0CnRpbWUgYSBjZGMtYWNtIGRl dmljZSBpcyBwbHVnZ2VkIGluLgoKRnJvbSBqdXN0IGEgcXVpY2sgbG9vaywgaXQgc2VlbXMgeW91 IG5lZWQgdG8gcHJldmVudCB5b3VyIGRvd25sb2FkIHRvb2wKZnJvbSBzZW5kaW5nICJYWCIgYmVm b3JlIGRpc2FibGluZyBFQ0hPLiBXaHkgd291bGRuJ3QgdGhhdCB3b3JrPwoKVGhhbmtzLApKb2hh bgo=