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: uas: fix usb subsystem hang after power off hub port From: Oliver Neukum Message-Id: <1552405047.21557.7.camel@suse.com> Date: Tue, 12 Mar 2019 16:37:27 +0100 To: Kento.A.Kobayashi@sony.com, gregkh@linuxfoundation.org, stern@rowland.harvard.edu Cc: usb-storage@lists.one-eyed-alien.net, Jacky.Cao@sony.com, Kan.Iibuchi@sony.com, No.Tanaka@sony.com, linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org, linux-usb@vger.kernel.org List-ID: T24gTW8sIDIwMTktMDMtMTEgYXQgMDg6MzYgKzAwMDAsIEtlbnRvLkEuS29iYXlhc2hpQHNvbnku Y29tIHdyb3RlOgo+IEhpLAo+IAo+ID4gbm8gSSBhbSBzb3JyeSwgdGhhdCBpcyBhbiBhc3N1bXB0 aW9uIHlvdSBqdXN0IGNhbm5vdCBtYWtlLgo+ID4gQW55dGhpbmcgY2FuIHRyaWdnZXIgYSByZXNl dC4gVGhhdCBiZWluZyBTQ1NJIGlzIHRoZSBjb21tb24gY2FzZSBjZXJ0YWlubHksIGJ1dCBub3Qg dGhlIG9ubHkgY2FzZS4gQW5kIGluIHRob3NlIGNhc2VzIHdlIGNhbm5vdCBkZXBlbmQgb24gdXBw ZXIgbGF5ZXJzIGRvaW5nIHRoZSByaWdodCB0aGluZywgaWYgd2UganVzdCBpZ25vcmUgYW4gZXJy b3IuCj4gCj4gV2hpbGUgd2UgaW52ZXN0aWdhdGUgdGhpcyBpc3N1ZSwgd2UgZGVidWdnZWQgYW5k IGZvdW5kIHVzYl9yZXNldF9hbmRfdmVyaWZ5X2RldmljZSB3aWxsIHJldHVybiAtTk9ERVYgYmVm b3JlIGVudGVyIHBvc3RfcmVzZXQgb3BlcmF0aW9uLgoKWWVzLCB0aGlzIGNhbiBoYXBwZW4uCgo+ IEFuZCB0aGUgcmV0dXJuIHZhbHVlKC1FTk9ERVYpIHdpbGwgYmUgcmV0dXJuZWQgdG8gZXJyb3Ig aGFuZGxlci4KPiB1YXNfZWhfZGV2aWNlX3Jlc2V0X2hhbmRsZXItPnVzYl9yZXNldF9kZXZpY2Ug LT4gdXNiX3Jlc2V0X2FuZF92ZXJpZnlfZGV2aWNlIChyZXR1cm4gLUVOT0RFVikgVGhlbiBJIHdy b3RlIHRoYXQgY29tbWl0IG1lc3NhZ2UgdGhhdCB3ZSB0aGluayBldmVuIGlmIHdlIGlnbm9yZSAi RU5PREVWIiBpbiBwb3N0IHJlc2V0IHRvIGF2b2lkIGhhbmcgaXNzdWUgYnV0IHRoZSBlcnJvciB3 aWxsIGFsc28gYmUgcmVwb3J0ZWQgdG8gZXJyb3IgaGFuZGxlci4KPiAjSWYgaWdub3JlIGFuIGVy cm9yIGFuZCB0aGUgZXJyb3Igd2lsbCBub3QgYmUgcmVwb3J0ZWQgdGhlbiBpdCBpcyBub3QgZ29v ZC4KCldlbGwsIHdoYXQgZG8gd2UgZG8gbm93PyBBcmUgeW91IHNheWluZyB0aGF0IHRoZSBzdGF0 ZSBtb2RlbCBTQ1NJIGlzCnVzaW5nIGlzIHdyb25nPwoKPiBBZGRpdGlvbmFsIGluZm9ybWF0aW9u IGFib3V0IHVzYi1zdG9yYWdlIGRyaXZlcih1c2Ivc3RvcmFnZS91c2IuYykgaW4gdXNiX3N0b3Jf cG9zdF9yZXNldCgpIGZ1bmN0aW9uLCBpdCBhbHdheXMgcmV0dXJuIDAgdGhhdCBtZWFucyByZWJp bmQgd2lsbCBub3QgYmUgZXhlY3V0ZSBhbmQgdGhpcyBpc3N1ZSBkb2Vzbid0IGhhcHBlbi4KCkkg YW0gYWZyYWlkIHRoaXMgaXMgb25seSBwYXJ0aWFsbHkgY29ycmVjdC4gVGhlIGRldmljZSBkZXNj cmlwdG9ycyBjYW4Kc3RpbGwgZmFpbCB0byBtYXRjaC4KCglSZWdhcmRzCgkJT2xpdmVyCg==