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: usb: Don't disable Latency tolerance Messaging (LTM) before port reset From: Mathias Nyman Message-Id: <1519902928-8224-1-git-send-email-mathias.nyman@linux.intel.com> Date: Thu, 1 Mar 2018 13:15:28 +0200 To: gregkh@linuxfoundation.org Cc: stern@rowland.harvard.edu, linux-usb@vger.kernel.org, Mathias Nyman List-ID: RGlzYWJpbmcgTGF0ZW5jeSBUb2xlcmFuY2UgTWVzc2FnaW5nIGJlZm9yZSBwb3J0IHJlc2V0IGlz IHVubmVjZXNzYXJ5LgpMVE0gaXMgYXV0b21hdGljYWxseSBkaXNhYmxlZCBhdCBwb3J0IHJlc2V0 LgoKSWYgaG9zdCBjYW4ndCBjb21tdW5pY2F0ZSB3aXRoIHRoZSBkZXZpY2UgdGhlIExUTSBtZXNz YWdlIHdpbGwgZmFpbCwgYW5kCnRoZSBodWIgZHJpdmVyIHdpbGwgdW5uZWNlc3NhcmlseSBkbyBh IGxvZ2ljYWwgZGlzY29ubmVjdC4KQnJva2VuIGNvbW11bmljYXRpb24gaXMgb2Z0ZXIgdGhlIHJl YXNvbiBmb3IgYSByZXNldCBpbiB0aGUgZmlyc3QgcGxhY2UuCgpBZGRpdGlvbmFsbHkgd2UgY2Fu J3QgZ3VhcmFudGVlIGRldmljZSBpcyBpbiBhIGNvbmZpZ3VyZWQgc3RhdGUsCmVwZWNpYWxseSBp biByZXNldC1yZXN1bWUgY2FzZSB3aGVuIHJvb3QgaHViIGxvc3QgcG93ZXIuCkxUTSBjYW4ndCBi ZSBtb2RpZmllZCB1bmxlc3MgZGV2aWNlIGlzIGluIGEgY29uZmlndXJlZCBzdGF0ZS4KCkp1c3Qg cmVtb3ZlIExUTSBkaXNhYmxpbmcgYmVmb3JlIHBvcnQgcmVzZXQuCgpEZXRhaWxzIGFib3V0IExU TSBhbmQgcG9ydCByZXNldCBpbiBVU0IgMyBzcGVjaWZpY2F0aW9uOgoKVVNCIDMgc3BlYyBzZWN0 aW9uIDkuNC41CiJUaGUgTFRNIEVuYWJsZSBmaWVsZCBjYW4gYmUgbW9kaWZpZWQgYnkgdGhlIFNl dEZlYXR1cmUoKSBhbmQKQ2xlYXJGZWF0dXJlKCkgcmVxdWVzdHMgdXNpbmcgdGhlIExUTV9FTkFC TEUgZmVhdHVyZSBzZWxlY3Rvci4KVGhpcyBmaWVsZCBpcyByZXNldCB0byB6ZXJvIHdoZW4gdGhl IGRldmljZSBpcyByZXNldC4iCgpVU0IgMyBzcGVjIHNlY3Rpb24gOS40LjEKIlRoZSBkZXZpY2Ug c2hhbGwgcHJvY2VzcyBhIENsZWFyIEZlYXR1cmUgKFUxX0VuYWJsZSBvciBVMl9FbmFibGUgb3IK TFRNX0VuYWJsZSkgb25seSBpZiB0aGUgZGV2aWNlIGlzIGluIHRoZSBjb25maWd1cmVkIHN0YXRl LiIKClNpZ25lZC1vZmYtYnk6IE1hdGhpYXMgTnltYW4gPG1hdGhpYXMubnltYW5AbGludXguaW50 ZWwuY29tPgotLS0KIGRyaXZlcnMvdXNiL2NvcmUvaHViLmMgfCAxMiArKystLS0tLS0tLS0KIDEg ZmlsZSBjaGFuZ2VkLCAzIGluc2VydGlvbnMoKyksIDkgZGVsZXRpb25zKC0pCgpkaWZmIC0tZ2l0 IGEvZHJpdmVycy91c2IvY29yZS9odWIuYyBiL2RyaXZlcnMvdXNiL2NvcmUvaHViLmMKaW5kZXgg YzVjMWY2Yy4uYWM3YmFiNyAxMDA2NDQKLS0tIGEvZHJpdmVycy91c2IvY29yZS9odWIuYworKysg Yi9kcml2ZXJzL3VzYi9jb3JlL2h1Yi5jCkBAIC01NTA1LDIxICs1NTA1LDE1IEBAIHN0YXRpYyBp bnQgdXNiX3Jlc2V0X2FuZF92ZXJpZnlfZGV2aWNlKHN0cnVjdCB1c2JfZGV2aWNlICp1ZGV2KQog CWlmICh1ZGV2LT51c2IyX2h3X2xwbV9lbmFibGVkID09IDEpCiAJCXVzYl9zZXRfdXNiMl9oYXJk d2FyZV9scG0odWRldiwgMCk7CiAKLQkvKiBEaXNhYmxlIExQTSBhbmQgTFRNIHdoaWxlIHdlIHJl c2V0IHRoZSBkZXZpY2UgYW5kIHJlaW5zdGFsbCB0aGUgYWx0Ci0JICogc2V0dGluZ3MuICBEZXZp Y2UtaW5pdGlhdGVkIExQTSBzZXR0aW5ncywgYW5kIHN5c3RlbSBleGl0IGxhdGVuY3kKLQkgKiBz ZXR0aW5ncyBhcmUgY2xlYXJlZCB3aGVuIHRoZSBkZXZpY2UgaXMgcmVzZXQsIHNvIHdlIGhhdmUg dG8gc2V0Ci0JICogdGhlbSB1cCBhZ2Fpbi4KKwkvKiBEaXNhYmxlIExQTSB3aGlsZSB3ZSByZXNl dCB0aGUgZGV2aWNlIGFuZCByZWluc3RhbGwgdGhlIGFsdCBzZXR0aW5ncy4KKwkgKiBEZXZpY2Ut aW5pdGlhdGVkIExQTSwgYW5kIHN5c3RlbSBleGl0IGxhdGVuY3kgc2V0dGluZ3MgYXJlIGNsZWFy ZWQKKwkgKiB3aGVuIHRoZSBkZXZpY2UgaXMgcmVzZXQsIHNvIHdlIGhhdmUgdG8gc2V0IHRoZW0g dXAgYWdhaW4uCiAJICovCiAJcmV0ID0gdXNiX3VubG9ja2VkX2Rpc2FibGVfbHBtKHVkZXYpOwog CWlmIChyZXQpIHsKIAkJZGV2X2VycigmdWRldi0+ZGV2LCAiJXMgRmFpbGVkIHRvIGRpc2FibGUg TFBNXG4iLCBfX2Z1bmNfXyk7CiAJCWdvdG8gcmVfZW51bWVyYXRlX25vX2JvczsKIAl9Ci0JcmV0 ID0gdXNiX2Rpc2FibGVfbHRtKHVkZXYpOwotCWlmIChyZXQpIHsKLQkJZGV2X2VycigmdWRldi0+ ZGV2LCAiJXMgRmFpbGVkIHRvIGRpc2FibGUgTFRNXG4iLCBfX2Z1bmNfXyk7Ci0JCWdvdG8gcmVf ZW51bWVyYXRlX25vX2JvczsKLQl9CiAKIAlib3MgPSB1ZGV2LT5ib3M7CiAJdWRldi0+Ym9zID0g TlVMTDsK