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| Started by | Joseph Salisbury <joseph.salisbury@canonical.com> |
|---|---|
| First post | 2016-06-22 17:40 +0200 |
| Last post | 2016-06-22 18:40 +0200 |
| Articles | 3 — 3 participants |
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[v4.2-rc1 Regression] usb: Enable LPM for USB 2.01+ full-speed devices Joseph Salisbury <joseph.salisbury@canonical.com> - 2016-06-22 17:40 +0200
Re: [v4.2-rc1 Regression] usb: Enable LPM for USB 2.01+ full-speed devices Greg KH <gregkh@linuxfoundation.org> - 2016-06-22 18:20 +0200
Re: [v4.2-rc1 Regression] usb: Enable LPM for USB 2.01+ full-speed devices Alan Stern <stern@rowland.harvard.edu> - 2016-06-22 18:40 +0200
| From | Joseph Salisbury <joseph.salisbury@canonical.com> |
|---|---|
| Date | 2016-06-22 17:40 +0200 |
| Subject | [v4.2-rc1 Regression] usb: Enable LPM for USB 2.01+ full-speed devices |
| Message-ID | <rMSpY-5fh-21@gated-at.bofh.it> |
Hi Rupesh,
A kernel bug report was opened against Ubuntu [0]. After a kernel
bisect, it was found that reverting the following commit resolved this bug:
commit a8425292816ceaa8c49e29d2114e85d85a73e080
Author: Rupesh Tatiya <rtatiya@codeaurora.org>
Date: Tue Apr 14 16:36:55 2015 +0530
usb: Enable LPM for USB 2.01+ full-speed devices
The regression was introduced as of v4.2-rc1.
I was hoping to get your feedback, since you are the patch author. Do
you think gathering any additional data will help diagnose this issue,
or would it be best to submit a revert request?
Thanks,
Joe
[0] http://pad.lv/1498667
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| From | Greg KH <gregkh@linuxfoundation.org> |
|---|---|
| Date | 2016-06-22 18:20 +0200 |
| Message-ID | <rMT2G-5KQ-15@gated-at.bofh.it> |
| In reply to | #1428907 |
On Wed, Jun 22, 2016 at 11:38:43AM -0400, Joseph Salisbury wrote: > Hi Rupesh, > > A kernel bug report was opened against Ubuntu [0]. After a kernel > bisect, it was found that reverting the following commit resolved this bug: > > commit a8425292816ceaa8c49e29d2114e85d85a73e080 > Author: Rupesh Tatiya <rtatiya@codeaurora.org> > Date: Tue Apr 14 16:36:55 2015 +0530 > > usb: Enable LPM for USB 2.01+ full-speed devices > > > The regression was introduced as of v4.2-rc1. > > I was hoping to get your feedback, since you are the patch author. Do > you think gathering any additional data will help diagnose this issue, > or would it be best to submit a revert request? Does the problem still happen with 4.7-rc4 or even 4.6? 4.2 is pretty old and obsolete you know :) thanks, greg k-h
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| From | Alan Stern <stern@rowland.harvard.edu> |
|---|---|
| Date | 2016-06-22 18:40 +0200 |
| Message-ID | <rMTm2-5QR-15@gated-at.bofh.it> |
| In reply to | #1428907 |
On Wed, 22 Jun 2016, Joseph Salisbury wrote: > Hi Rupesh, > > A kernel bug report was opened against Ubuntu [0]. After a kernel > bisect, it was found that reverting the following commit resolved this bug: > > commit a8425292816ceaa8c49e29d2114e85d85a73e080 > Author: Rupesh Tatiya <rtatiya@codeaurora.org> > Date: Tue Apr 14 16:36:55 2015 +0530 > > usb: Enable LPM for USB 2.01+ full-speed devices > > > The regression was introduced as of v4.2-rc1. > > I was hoping to get your feedback, since you are the patch author. Do > you think gathering any additional data will help diagnose this issue, > or would it be best to submit a revert request? Another option is to add a NO_LPM quirks entry for the troublesome device. Alan Stern
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