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Message-ID: <CAChTCPz8_2ddsuBgVF0VX-a7Lp=WHWP+W3nyzQgi+g9Tj2EZvQ@mail.gmail.com>
Date:	Tue, 1 Sep 2015 17:14:37 +0300
From:	Mika Penttilä <mika.j.penttila@...il.com>
To:	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	edubezval@...il.com
Subject: 

This one causes imx6q with debug uart connected to "schedule while
atomic" endlessly :


9e7b399d6528eac33a6fbfceb2b92af209c3454d is the first bad commit
commit 9e7b399d6528eac33a6fbfceb2b92af209c3454d
Author: Eduardo Valentin <edubezval@...il.com>
Date:   Tue Aug 11 10:21:20 2015 -0700

    serial: imx: remove unbalanced clk_prepare

    The current code attempts to prepare clk_per and clk_ipg
    before using the device. However, the result is an extra
    prepare call on each clock. Here is the output of uart
    clocks (only uart enabled and used as console):

    $  grep uart /sys/kernel/debug/clk/clk_summary
     uart_serial           1            2    80000000          0 0
           uart           1            2    66000000          0 0

    This patch balances the calls of prepares. The result is:

    $  grep uart /sys/kernel/debug/clk/clk_summary
     uart_serial           1            1    80000000          0 0
           uart           1            1    66000000          0 0

    Cc: Fabio Estevam <festevam@...il.com>
    Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
    Cc: Jiri Slaby <jslaby@...e.com>
    Cc: linux-serial@...r.kernel.org
    Cc: linux-pm@...r.kernel.org
    Cc: linux-kernel@...r.kernel.org
    Signed-off-by: Eduardo Valentin <edubezval@...il.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
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