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Date:   Thu, 21 May 2020 22:39:25 +0200
From:   Paul Cercueil <paul@crapouillou.net>
Subject: Re: [PATCH] usb: musb: jz4740: Prevent lockup when CONFIG_SMP is set
To:     Bin Liu <b-liu@ti.com>
Cc:     od@zcrc.me, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org
Message-Id: <P18PAQ.NMWTDBTHKARL1@crapouillou.net>
In-Reply-To: <20200521203422.GA25575@iaqt7>
References: <20200520150111.76658-1-paul@crapouillou.net>
        <20200521203422.GA25575@iaqt7>
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Hi Bin,

The patch it fixes was introduced in 5.7-rc1, is it possible to queue=20
it for the next -rc? Otherwise I'll need to Cc it to linux-stable.

-Paul

Le jeu. 21 mai 2020 =E0 15:34, Bin Liu <b-liu@ti.com> a =E9crit :
> On Wed, May 20, 2020 at 05:01:11PM +0200, Paul Cercueil wrote:
>>  The function dma_controller_irq() locks up the exact same spinlock=20
>> we
>>  locked before calling it, which obviously resulted in a deadlock=20
>> when
>>  CONFIG_SMP was enabled. This flew under the radar as none of the=20
>> boards
>>  supported by this driver needs SMP.
>>=20
>>  Fixes: 57aadb46bd63 ("usb: musb: jz4740: Add support for DMA")
>>  Signed-off-by: Paul Cercueil <paul@crapouillou.net>
>=20
> Queued for v5.8. Thanks.
> -Bin.