linux-kernel - Re: [PATCH] misc: atmel-ssc: lock with mutex instead of spinlock

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Message-ID: <20200601173126.GA31822@qmqm.qmqm.pl>
Date:   Mon, 1 Jun 2020 19:31:27 +0200
From:   Michał Mirosław <mirq-linux@...e.qmqm.pl>
To:     Markus Elfring <Markus.Elfring@....de>
Cc:     linux-arm-kernel@...ts.infradead.org,
        kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Ludovic Desroches <ludovic.desroches@...rochip.com>,
        Nicolas Ferre <nicolas.ferre@...rochip.com>
Subject: Re: [PATCH] misc: atmel-ssc: lock with mutex instead of spinlock

On Mon, Jun 01, 2020 at 11:18:48AM +0200, Markus Elfring wrote:
> > Uninterruptible context is not needed in the driver and causes lockdep
> > warning because of mutex taken in of_alias_get_id().
> 
> Was a spin lock taken?
> > Convert the lock to mutex to avoid the issue.
> Would you like to add the tag “Fixes” to the commit message?

I guess we can add:

Fixes: 099343c64e16 ("ARM: at91: atmel-ssc: add device tree support")

Best Regards
Michał Mirosław