linux-kernel - Re: Questions about drivers/mfd/mfd-core.c

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Date:   Tue, 22 Sep 2020 10:03:57 +0100
From:   Lee Jones <lee.jones@...aro.org>
To:     冯锐 <rui_feng@...lsil.com.cn>
Cc:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: Questions about drivers/mfd/mfd-core.c

On Mon, 21 Sep 2020, 冯锐 wrote:

> Hi Jones,
> 
> I have a question about drivers/mfd/mfd-core.c and need your help.
> The driver in drivers/misc/cardreader/rtsx_pcr.c call 'mfd_add_devices' and 'mfd_remove_devices' in probe and remove functions
> Before Linus 5.9-rc1, the two functions can run properly, but in Linus 5.9-rc1 when I unplug the cardreader 'mfd_remove_devices' will lead to a kernel bug like below:

The problem should be fixed in Mainline.

Please upgrade your kernel to the latest -rc.

-- 
Lee Jones [李琼斯]
Senior Technical Lead - Developer Services
Linaro.org │ Open source software for Arm SoCs
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