From: Ritesh Raj Sarraf <rrs-7WuBAv+fczCJ8c2fQYRYNw@public.gmane.org>
To: Ulf Hansson <ulf.hansson-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>,
Alan Stern
<stern-nwvwT67g6+6dFdvTe/nMLpVzexx5G7lz@public.gmane.org>
Cc: USB list <linux-usb-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
linux-mmc <linux-mmc-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Subject: Re: xHCI problem? [was Re: Erratic USB device behavior and device loss]
Date: Fri, 09 Sep 2016 18:44:21 +0530 [thread overview]
Message-ID: <1473426861.9415.2.camel@researchut.com> (raw)
In-Reply-To: <CAPDyKFr0vEaEbsoPm6YwJD1JOQc=YR=zwi4T6Rr3gCQ4StNuvg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
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On Fri, 2016-09-09 at 12:54 +0200, Ulf Hansson wrote:
> This affects the way the core calls the host driver's ->set_ios()
> callback. Earlier it was invoked first to do power off then power up.
> With this change it starts with power up instead.
> I wanted to try this because I suspected the initial state could be wrong.
>
> So here are some other ideas on how to move forward.
> 1. Run with CONFIG_PM unset to see if we can reproduce the problem.
> 2. Revert back the state in the mmc core we had in 3.16 around how it
> deals with runtime PM for host devices. That's actually very easy as
> we only need to remove the pm_runtime_put|get() calls in
> mmc_claim|release_host().
>
> Ritesh, can you try these options?
>
Yes. I can try the above ones now. I'm building the kernel for it.
> Neither of the above will actually solve the problem, so I guess we
> anyway need take a closer look to understand why the usb device is
> accessed when it is actually runtime suspended.
>
> BTW, Ritesh you could also run a git bisect to find out if/when this
> became broken.
What starting point do you want me to use ? 4.0 ?
- --
Ritesh Raj Sarraf
RESEARCHUT - http://www.researchut.com
"Necessity is the mother of invention."
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next prev parent reply other threads:[~2016-09-09 13:14 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1472132041.13456.11.camel@researchut.com>
2016-08-25 17:17 ` xHCI problem? [was Re: Erratic USB device behavior and device loss] Alan Stern
[not found] ` <Pine.LNX.4.44L0.1608251254220.1395-100000-IYeN2dnnYyZXsRXLowluHWD2FQJk+8+b@public.gmane.org>
2016-08-30 8:14 ` Ulf Hansson
[not found] ` <CAPDyKFq2SYtwWCNhSzQcxj8XdYmAhTqn6mxRKMJ7eKZAk=itWg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-09-04 11:32 ` Ritesh Raj Sarraf
2016-09-04 18:01 ` Ritesh Raj Sarraf
[not found] ` <1473012074.5339.6.camel-7WuBAv+fczCJ8c2fQYRYNw@public.gmane.org>
2016-09-04 19:46 ` Alan Stern
2016-09-05 12:59 ` Ritesh Raj Sarraf
[not found] ` <1473080344.10346.4.camel-7WuBAv+fczCJ8c2fQYRYNw@public.gmane.org>
2016-09-05 15:58 ` Alan Stern
[not found] ` <Pine.LNX.4.44L0.1609051157310.25234-100000-pYrvlCTfrz9XsRXLowluHWD2FQJk+8+b@public.gmane.org>
2016-09-06 9:42 ` Ulf Hansson
2016-09-06 17:08 ` Ritesh Raj Sarraf
[not found] ` <CAPDyKFpnCXhdoKgoG576teC=y38vbC1x=-ehC_9EWEeKr_K6BQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-09-07 20:48 ` Alan Stern
[not found] ` <Pine.LNX.4.44L0.1609071630350.2115-100000-IYeN2dnnYyZXsRXLowluHWD2FQJk+8+b@public.gmane.org>
2016-09-09 10:54 ` Ulf Hansson
[not found] ` <CAPDyKFr0vEaEbsoPm6YwJD1JOQc=YR=zwi4T6Rr3gCQ4StNuvg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-09-09 13:14 ` Ritesh Raj Sarraf [this message]
[not found] ` <1473426861.9415.2.camel-7WuBAv+fczCJ8c2fQYRYNw@public.gmane.org>
2016-09-09 14:04 ` Ritesh Raj Sarraf
[not found] ` <1473429884.9415.8.camel-7WuBAv+fczCJ8c2fQYRYNw@public.gmane.org>
2016-09-09 16:15 ` Alan Stern
2016-09-14 14:50 ` Ritesh Raj Sarraf
[not found] ` <1473864634.9913.12.camel-7WuBAv+fczCJ8c2fQYRYNw@public.gmane.org>
2016-09-14 15:19 ` Alan Stern
2016-09-15 13:59 ` Ulf Hansson
2016-09-15 14:16 ` Alan Stern
2016-09-16 15:42 ` Ritesh Raj Sarraf
2016-09-16 21:40 ` Alan Stern
[not found] ` <Pine.LNX.4.44L0.1609161729340.1657-100000-IYeN2dnnYyZXsRXLowluHWD2FQJk+8+b@public.gmane.org>
2016-09-17 11:42 ` Ritesh Raj Sarraf
2016-09-18 1:42 ` Alan Stern
[not found] ` <Pine.LNX.4.44L0.1609172131120.698-100000-pYrvlCTfrz9XsRXLowluHWD2FQJk+8+b@public.gmane.org>
2016-09-19 10:10 ` Ulf Hansson
2016-09-19 17:48 ` Alan Stern
[not found] ` <Pine.LNX.4.44L0.1609191340320.1458-100000-IYeN2dnnYyZXsRXLowluHWD2FQJk+8+b@public.gmane.org>
2016-09-20 12:36 ` Ritesh Raj Sarraf
2016-09-20 14:16 ` Alan Stern
[not found] ` <Pine.LNX.4.44L0.1609201012290.1459-100000-IYeN2dnnYyZXsRXLowluHWD2FQJk+8+b@public.gmane.org>
2016-09-20 15:17 ` Ritesh Raj Sarraf
[not found] ` <1474384626.21100.6.camel-7WuBAv+fczCJ8c2fQYRYNw@public.gmane.org>
2016-09-20 15:43 ` Alan Stern
2016-09-20 15:51 ` Ritesh Raj Sarraf
2016-09-21 11:10 ` Ritesh Raj Sarraf
[not found] ` <1474456212.8192.2.camel-7WuBAv+fczCJ8c2fQYRYNw@public.gmane.org>
2016-09-21 11:17 ` Ulf Hansson
[not found] ` <CAPDyKFrWHaPhubTsPjd7GpZcoQnGM9u1YEiy=iGpb1Qa2rJqPA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-09-21 11:42 ` Ritesh Raj Sarraf
2016-09-21 14:37 ` Alan Stern
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