From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Rafael J. Wysocki" Subject: Re: [PATCH] PM: fix irq enable/disable in runtime PM code Date: Wed, 25 Nov 2009 01:18:08 +0100 Message-ID: <200911250118.08918.rjw@sisk.pl> References: Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-pm-bounces@lists.linux-foundation.org Errors-To: linux-pm-bounces@lists.linux-foundation.org To: Alan Stern Cc: Linux-pm mailing list List-Id: linux-pm@vger.kernel.org On Tuesday 24 November 2009, Alan Stern wrote: > This patch (as1305) fixes a bug in the irq-enable settings and removes > some related overhead in the runtime PM code. > > In __pm_runtime_resume(), within the scope of the original > spin_lock_irq(), we know that irqs are disabled. There's no > reason to go through a pair of enable/disable cycles when > acquiring and releasing the parent's lock. > > In __pm_runtime_set_status(), irqs are already disabled when > the parent's lock is acquired, and they must remain disabled > when it is released. > > Signed-off-by: Alan Stern Applied to suspend-2.6/linux-next. I'll try to push it to Linus before 2.6.32. Thanks, Rafael