linux-kernel - Re: [PATCH 10/11] Revert "serial: omap: unlock the port lock"

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Message-ID: <5333732F.6040803@hurleysoftware.com>
Date:	Wed, 26 Mar 2014 20:39:11 -0400
From:	Peter Hurley <peter@...leysoftware.com>
To:	Tony Lindgren <tony@...mide.com>
CC:	Felipe Balbi <balbi@...com>, Greg KH <gregkh@...uxfoundation.org>,
	linux-serial@...r.kernel.org, linux-bluetooth@...r.kernel.org,
	m-karicheri2@...com, b32955@...escale.com,
	Linux OMAP Mailing List <linux-omap@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 10/11] Revert "serial: omap: unlock the port lock"

On 03/25/2014 02:28 PM, Tony Lindgren wrote:
> * Felipe Balbi <balbi@...com> [140320 12:39]:
>> This reverts commit 0324a821029e1f54e7a7f8fed48693cfce42dc0e.
>>
>> That commit tried to fix a deadlock problem when using
>> hci_ldisc, but it turns out the bug was in hci_ldsic
>> all along where it was calling ->write() from within
>> ->write_wakeup() callback.
>>
>> The problem is that ->write_wakeup() was called with
>> port lock held and ->write() tried to grab the same
>> port lock.
>
> Should this and the next patch be earlier in the series
> as a fix for the v3.15-rc cycle? Should they be cc: stable
> as well?

Well, right now the other fix has had _zero_ testing
so not really a -stable candidate just yet.

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