From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ritesh Raj Sarraf <rrs@researchut.com>
Subject: Re: xHCI problem? [was Re: Erratic USB device behavior and device
 loss]
Date: Tue, 06 Sep 2016 22:38:54 +0530
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To: Ulf Hansson <ulf.hansson@linaro.org>, Alan Stern <stern@rowland.harvard.edu>
Cc: USB list <linux-usb@vger.kernel.org>, linux-mmc <linux-mmc@vger.kernel.org>

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Hello Ulf,

On Tue, 2016-09-06 at 11:42 +0200, Ulf Hansson wrote:
> 
> By reviewing the code of the rtsx_usb_sdmmc driver, particularly how
> it calls pm_runtime_get|put() I am guessing those calls may not be
> properly deployed. Perhaps rtsx_usb_sdmmc should convert to use the
> usb_autopm_put|get_interface() and friends, although I didn't want to
> make that change at this point so instead I have cooked a patch that
> might fixes the behaviour.
> 
> Ritesh, can you please try it out to see what happens?

I was able to hit the issue again, with your patch applied. I tried it on top of
the 4.8-rc5 kernel.

I ensured to capture usbmon trace.
https://people.debian.org/~rrs/tmp/usbmon-ulf.txt.gz


- -- 
Ritesh Raj Sarraf
RESEARCHUT - http://www.researchut.com
"Necessity is the mother of invention."
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