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: [v3] cdc-acm: fix abnormal DATA RX issue for Mediatek Preloader. From: Johan Hovold Message-Id: <20181218105419.GL20658@localhost> Date: Tue, 18 Dec 2018 11:54:19 +0100 To: Macpaul Lin Cc: Johan Hovold , Oliver Neukum , Greg Kroah-Hartman , linux-usb@vger.kernel.org, stable@vger.kernel.org, Mediatek WSD Upstream List-ID: T24gVHVlLCBEZWMgMTgsIDIwMTggYXQgMDY6NDE6MjBQTSArMDgwMCwgTWFjcGF1bCBMaW4gd3Jv dGU6Cj4gTWVkaWF0ZWsgUHJlbG9hZGVyIGlzIGEgcHJvcHJpZXRhcnkgZW1iZWRkZWQgYm9vdCBs b2FkZXIgZm9yIGxvYWRpbmcKPiBMaXR0bGUgS2VybmVsIGFuZCBMaW51eCBpbnRvIGRldmljZSBE UkFNLgo+IAo+IFRoaXMgYm9vdCBsb2FkZXIgYWxzbyBoYW5kbGUgZmlybXdhcmUgdXBkYXRlLiBN ZWRpYXRlayBQcmVsb2FkZXIgd2lsbCBiZQo+IGVudW1lcmF0ZWQgYXMgYSB2aXJ0dWFsIENPTSBw b3J0IHdoZW4gdGhlIGRldmljZSBpcyBjb25uZWN0ZWQgdG8gV2luZG93cwo+IG9yIExpbnV4IE9T IHZpYSBDREMtQUNNIGNsYXNzIGRyaXZlci4gV2hlbiB0aGUgVVNCIGVudW1lcmF0aW9uIGhhcyBi ZWVuCj4gZG9uZSwgTWVkaWF0ZWsgUHJlbG9hZGVyIHdpbGwgc2VuZCBvdXQgaGFuZHNoYWtlIGNv bW1hbmQgIlJFQURZIiB0byBQQwo+IGFjdGl2ZWx5IGluc3RlYWQgb2Ygd2FpdGluZyBjb21tYW5k IGZyb20gdGhlIGRvd25sb2FkIHRvb2wuCj4gU2luY2UgTGludXggNC4xMiwgdGhlIGNvbW1pdCAi dHR5OiByZXNldCB0ZXJtaW9zIHN0YXRlIG9uIGRldmljZQo+IHJlZ2lzdHJhdGlvbiIgKDkzODU3 ZWRkOTgyOWUxNDRhY2I2YzdlNzJkNTkzZjZlMDFhZWFkNjYpIGNhdXNlcyBNZWRpYXRlawo+IFBy ZWxvYWRlciByZWNlaXZpbmcgc29tZSBhYm5vcmFtbCBjb21tYW5kIGxpa2UgIlJFQURZWFgiIGFz IGl0IHNlbnQuCj4gVGhpcyB3aWxsIGJlIHJlY29nbml6ZWQgYXMgYW4gaW5jb3JyZWN0IHJlc3Bv bnNlLiBUaGUgYmVoYXZpb3IgY2hhbmdlCj4gYWxzbyBjYXVzZXMgdGhlIGRvd25sb2FkIGhhbmRz aGFrZSBmYWlsLgo+IAo+IEJ5IGRpc2FibGluZyB0aGUgRUNITyB0ZXJtaW9zIGZsYWcgY291bGQg YXZvaWQgdGhpcyBwcm9ibGVtLiBIb3dldmVyLCBpdAo+IGNhbm5vdCBiZSBkb25lIGJ5IHVzZXIg c3BhY2UgY29uZmlndXJhdGlvbiB3aGVuIGRvd25sb2FkIHRvb2wgb3Blbgo+IC9kZXYvdHR5QUNN MC4gVGhpcyBpcyBiZWNhdXNlIHRoZSBkZXZpY2UgcnVubmluZyBNZWRpYXRlayBQcmVsb2FkZXIg d2lsbAo+IHNlbmQgaGFuZHNoYWtlIGNvbW1hbmQgIlJFQURZIiBpbW1lZGlhdGVseSBvbmNlIHRo ZSBDREMtQUNNIGRyaXZlciBpcwo+IHJlYWR5Lgo+IAo+IFRoaXMgcGF0Y2ggd2FudHMgdG8gZml4 IGFib3ZlIHByb2JsZW0gYnkgaW50cm9kdWNpbmcgIkRJU0FCTEVfRUNITyIKPiBwcm9wZXJ0eSBp biBkcml2ZXJfaW5mby4gV2hlbiBNZWRpYXRlayBQcmVsb2FkZXIgaXMgY29ubmVjdGVkLCB0aGUK PiBDREMtQUNNIGRyaXZlciBjb3VsZCBkaXNhYmxlIEVDSE8gZmxhZyBpbiB0ZXJtaW9zIHRvIGF2 b2lkIHRoZSBwcm9ibGVtLgo+IAo+IFNpZ25lZC1vZmYtYnk6IE1hY3BhdWwgTGluIDxtYWNwYXVs LmxpbkBtZWRpYXRlay5jb20+Cj4gLS0tCj4gQ2hhbmdlcyBmb3IgdjI6Cj4gIC0gTW92ZSBxdWly a3MgdGVzdGluZyBvZiBESVNBQkxFX0VDSE8gZmxhZyBpbnRvIGFjbV90dHlfaW5zdGFsbCgpLgo+ ICAtIENoYW5nZSBxdWlya3MgdGVzdGluZyBpbnRvIGJpdHdpc2UgY29tcGFyaXNvbi4KPiBDaGFu Z2VzIGZvciB2MzoKPiAgLSBSZXBsYWNlIGNsZWFyIGZsYWcgb3BlcmF0aW9uIGZyb20gZHJpdmVy LT5pbml0X3Rlcm1pb3MgdG8gdHR5LT50ZXJtaW9zLgo+ICAtIFJlbW92ZSBwYXJlbnRoZXNpcyBv ZiBFQ0hPIGZsYWcuCgpUaGFua3MgZm9yIHRoZSB1cGRhdGUuIExvb2tzIGdvb2QsIGp1c3Qgc29t ZSBtaW5vciBpc3N1ZXMgYmVsb3cuCgo+ICBkcml2ZXJzL3VzYi9jbGFzcy9jZGMtYWNtLmMgfCAx MyArKysrKysrKysrKystCj4gIGRyaXZlcnMvdXNiL2NsYXNzL2NkYy1hY20uaCB8ICAxICsKPiAg MiBmaWxlcyBjaGFuZ2VkLCAxMyBpbnNlcnRpb25zKCspLCAxIGRlbGV0aW9uKC0pCj4gCj4gZGlm ZiAtLWdpdCBhL2RyaXZlcnMvdXNiL2NsYXNzL2NkYy1hY20uYyBiL2RyaXZlcnMvdXNiL2NsYXNz L2NkYy1hY20uYwo+IGluZGV4IDFiNjhmZWQuLmMxYjg4YzMgMTAwNjQ0Cj4gLS0tIGEvZHJpdmVy cy91c2IvY2xhc3MvY2RjLWFjbS5jCj4gKysrIGIvZHJpdmVycy91c2IvY2xhc3MvY2RjLWFjbS5j Cj4gQEAgLTU3MSw2ICs1NzEsNyBAQCBzdGF0aWMgdm9pZCBhY21fc29mdGludChzdHJ1Y3Qgd29y a19zdHJ1Y3QgKndvcmspCj4gIHN0YXRpYyBpbnQgYWNtX3R0eV9pbnN0YWxsKHN0cnVjdCB0dHlf ZHJpdmVyICpkcml2ZXIsIHN0cnVjdCB0dHlfc3RydWN0ICp0dHkpCj4gIHsKPiAgCXN0cnVjdCBh Y20gKmFjbTsKPiArCXVuc2lnbmVkIGxvbmcgcXVpcmtzOwo+ICAJaW50IHJldHZhbDsKPiAgCj4g IAlhY20gPSBhY21fZ2V0X2J5X21pbm9yKHR0eS0+aW5kZXgpOwo+IEBAIC01ODMsNiArNTg0LDEz IEBAIHN0YXRpYyBpbnQgYWNtX3R0eV9pbnN0YWxsKHN0cnVjdCB0dHlfZHJpdmVyICpkcml2ZXIs IHN0cnVjdCB0dHlfc3RydWN0ICp0dHkpCj4gIAo+ICAJdHR5LT5kcml2ZXJfZGF0YSA9IGFjbTsK PiAgCj4gKwkvKiBnZXQgbm9ybWFsIHF1aXJrcyAqLwo+ICsJcXVpcmtzID0gYWNtLT5xdWlya3M7 CgpJJ2QgZHJvcCB0aGUgcXVpcmtzIHZhcmlhYmxlIGFzIHlvdSBvbmx5IG5lZWQgaXQgb25jZSBh bmQgYWNtLT5xdWlya3MgaXMKcHJldHR5IHNob3J0IHRvIGJlZ2luIHdpdGguCgo+ICsKPiArCS8q IGhhbmRsZSBhY3RpdmUgaGFuZHNoYWtlIHRyaWdnZXJlZCBieSBkZXZpY2UgKi8KClBsZWFzZSBt YWtlIHRoaXMgZGVzY3JpcHRpb24gbW9yZSBnZW5lcmFsOyBvdGhlciBkZXZpY2VzIG1heSBhbHNv IGVuZCB1cApuZWVkaW5nIHRvIHN1cHByZXNzIGluaXRpYWwgZWNob2luZy4KCj4gKwlpZiAocXVp cmtzICYgRElTQUJMRV9FQ0hPKQo+ICsJCXR0eS0+dGVybWlvcy5jX2xmbGFnICY9IH5FQ0hPOwoK QW5kIGZpbmFsbHksIHBsZWFzZSBtb3ZlIHRoaXMganVzdCBhZnRlciBpbnN0YWxsaW5nIHRoZSB0 dHkgKGkuZS4gYmVmb3JlCnNldHRpbmcgdHR5LT5kcml2ZXIgZGF0YSkuCgo+ICsKPiAgCXJldHVy biAwOwoKVGhhbmtzLApKb2hhbgo=