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: <1553510086.2668.2.camel@suse.com> Date: Mon, 25 Mar 2019 11:34:46 +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, linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org, linux-usb@vger.kernel.org List-ID: T24gTW8sIDIwMTktMDMtMjUgYXQgMTA6MjEgKzAwMDAsIEtlbnRvLkEuS29iYXlhc2hpQHNvbnku Y29tIHdyb3RlOgo+IEhpLAo+IAo+ID4gPiA+IEFuZCB0aGUgcmV0dXJuIHZhbHVlKC1FTk9ERVYp IHdpbGwgYmUgcmV0dXJuZWQgdG8gZXJyb3IgaGFuZGxlci4KPiA+ID4gPiB1YXNfZWhfZGV2aWNl X3Jlc2V0X2hhbmRsZXItPnVzYl9yZXNldF9kZXZpY2UgLT4gdXNiX3Jlc2V0X2FuZF92ZXJpZnlf ZGV2aWNlIChyZXR1cm4gLUVOT0RFVikgVGhlbiBJIHdyb3RlIHRoYXQgY29tbWl0IG1lc3NhZ2Ug dGhhdCB3ZSB0aGluayBldmVuIGlmIHdlIGlnbm9yZSAiRU5PREVWIiBpbiBwb3N0IHJlc2V0IHRv IGF2b2lkIGhhbmcgaXNzdWUgYnV0IHRoZSBlcnJvciB3aWxsIGFsc28gYmUgcmVwb3J0ZWQgdG8g ZXJyb3IgaGFuZGxlci4KPiA+ID4gPiAjSWYgaWdub3JlIGFuIGVycm9yIGFuZCB0aGUgZXJyb3Ig d2lsbCBub3QgYmUgcmVwb3J0ZWQgdGhlbiBpdCBpcyBub3QgZ29vZC4KPiA+ID4gCj4gPiA+IFdl bGwsIHdoYXQgZG8gd2UgZG8gbm93PyBBcmUgeW91IHNheWluZyB0aGF0IHRoZSBzdGF0ZSBtb2Rl bCBTQ1NJIGlzIHVzaW5nIGlzIHdyb25nPwo+ID4gTm8sIGl0IGlzIG5vdCB3cm9uZy4KPiA+IEJ1 dCBJIHRoaW5rIHdlIG1heSB3YW50IHRvIHByZXZlbmQgaGFuZyBieSBzbGVlcCBwZW9jZXNzIHdp dGggY29udGludWluZyB0byB0YWtlIGEgbG9jayBhdCBibGtfZXhlY3V0ZV9ycSgpIGZyb20gPnVz Yl91bmJpbmRfYW5kX3JlYmluZF9tYXJkZWRfaW50ZXJmYWNlcygpLgo+IAo+IENvdWxkIHlvdSBw bGVhc2UgeW91IGNhbiBhcHBseSB0aGlzIHBhdGNoIGZvciBtYWlubGluZSBvciBub3Q/Cj4gSWYg bm90LCBjb3VsZCB5b3UgcGxlYXNlIHRlbGwgbWUgd2h5IHlvdSBjYW4ndCBhbGxvdyB0byBhcHBs eSB0aGlzIHBhdGNoPwoKU29ycnksCgpJIHRob3VnaHQgdGhpcyB3YXMgY2xlYXIuIFlvdXIgcGF0 Y2ggaXMgbWFraW5nIHRoZSBhc3N1bXB0aW9uIHRoYXQKdGhlIHJlc2V0IGlzIHRyaWdnZXJlZCBi eSB0aGUgU0NTSSBsYXllci4gWW91IGNhbm5vdCBtYWtlIHRoYXQKYXNzdW1wdGlvbiwgYXMgdGhl cmUgaXMgYW4gaW9jdGwgZm9yIHJlc2V0dGluZyBhIFVTQiBkZXZpY2UuCkluIGNhc2Ugd2UgYXJl IGdldHRpbmcgYW4gZXJyb3IgZHVyaW5nIHRoZSByZXNldCAob3VyIGVuZHBvaW50cwp2YW5pc2gp LCB0aGUgZGV2aWNlIGRyaXZlciBtdXN0IHJlcG9ydCB0aGF0IHRvIHRoZSBVU0IgbGF5ZXIsCnNv IHRoZSBkcml2ZXIgd2lsbCBhbHdheXMgYmUgZGlzY29ubmVjdGVkLgpXZSBjYW5ub3QgZHJvcCBl cnJvcnMuCgoJUmVnYXJkcwoJCU9saXZlcgo=