linux-kernel - Re: [PATCH] rfcomm: Convert spinlocks into mutexes

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Date:	Mon, 5 May 2014 19:25:50 -0700
From:	Marcel Holtmann <marcel@...tmann.org>
To:	Libor Pechacek <lpechacek@...e.cz>
Cc:	"Gustavo F. Padovan" <gustavo@...ovan.org>,
	Johan Hedberg <johan.hedberg@...il.com>,
	Peter Hurley <peter@...leysoftware.com>,
	Seung-Woo Kim <sw0312.kim@...sung.com>,
	Gianluca Anzolin <gianluca@...tospazio.it>,
	BlueZ development <linux-bluetooth@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>, Al Cho <acho@...e.com>
Subject: Re: [PATCH] rfcomm: Convert spinlocks into mutexes

Hi Libor,

> Enabling CONFIG_DEBUG_ATOMIC_SLEEP has shown that some rfcomm functions
> acquiring spinlocks call sleeping locks further in the chain.  Converting
> the offending spinlocks into mutexes makes sleeping safe.
> 
> Signed-off-by: Libor Pechacek <lpechacek@...e.cz>
> ---
> include/net/bluetooth/rfcomm.h |  6 +++---
> net/bluetooth/rfcomm/core.c    |  2 +-
> net/bluetooth/rfcomm/tty.c     | 20 ++++++++++----------
> 3 files changed, 14 insertions(+), 14 deletions(-)

patch has been applied to bluetooth-next tree.

Regards

Marcel

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