linux-kernel - Re: [RFC PATCH 0/2] Fix for the internal card reader and suspend on MacBooks

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Date:   Thu, 14 Feb 2019 22:20:22 +0500
From:   Ivan Mironov <mironov.ivan@...il.com>
To:     Mathias Nyman <mathias.nyman@...ux.intel.com>,
        linux-usb@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Alan Stern <stern@...land.harvard.edu>,
        Martin Liu <liumartin@...gle.com>,
        YueHaibing <yuehaibing@...wei.com>,
        Nicolas Boichat <drinkcat@...omium.org>,
        Jon Flatley <jflat@...omium.org>,
        Kai-Heng Feng <kai.heng.feng@...onical.com>,
        Benson Leung <bleung@...omium.org>,
        Harry Pan <harry.pan@...el.com>,
        Jack Stocker <jackstocker.93@...il.com>,
        Danilo Krummrich <danilokrummrich@...develop.de>,
        Samuel Sadok <samuel.sadok@...ewin.ch>
Subject: Re: [RFC PATCH 0/2] Fix for the internal card reader and suspend on
 MacBooks

On Thu, 2019-02-14 at 17:03 +0200, Mathias Nyman wrote:
> This card reader prevents second system suspend on latest kernels, see thread:
> https://marc.info/?l=linux-usb&m=154816680816246&w=2
> 
> In that case the card reader fails to resume from usb3 U3 suspend state,
> and ends up stuck in USB3 polling state, which now prevents suspend
> 
> Could you try a testpatch (attached) to see if it helps?
> 
> Thanks
> -Mathias

Hi Mathias,

thanks for your patch. I applied it on top of current master (5.0.0-
rc6+ 1f947a7a011fcceb14cb912f5481a53b18f1879a) and tested it.
Unfortunately, without success.

Card reader disappeared after the first suspend/resume cycle. Second
suspend failed.

Complete dmesg is here: https://raw.githubusercontent.com/im-0/investigate-card-reader-suspend-problem-on-mbp11.4/master/test-18/dmesg