Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757463AbaGQVIF (ORCPT ); Thu, 17 Jul 2014 17:08:05 -0400 Received: from mail3-relais-sop.national.inria.fr ([192.134.164.104]:51607 "EHLO mail3-relais-sop.national.inria.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752816AbaGQVIE (ORCPT ); Thu, 17 Jul 2014 17:08:04 -0400 X-IronPort-AV: E=Sophos;i="5.01,680,1400018400"; d="scan'208";a="71876489" Date: Thu, 17 Jul 2014 23:08:00 +0200 (CEST) From: Julia Lawall X-X-Sender: jll@localhost6.localdomain6 To: Lars-Peter Clausen cc: Himangi Saraogi , Jonathan Cameron , Greg Kroah-Hartman , linux-iio@vger.kernel.org, devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] staging: iio: adis16203: Use devm_iio_device_register In-Reply-To: <53C8364D.6010908@metafoo.de> Message-ID: References: <20140717204040.GA22788@himangi-Dell> <53C8364D.6010908@metafoo.de> User-Agent: Alpine 2.02 (DEB 1266 2009-07-14) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 17 Jul 2014, Lars-Peter Clausen wrote: > On 07/17/2014 10:40 PM, Himangi Saraogi wrote: > > This patch introduces the use of iio_device_register and does away with > > the call to the corressponding unregister function in the probe and > > remove functions of the driver respectively. > > > > Signed-off-by: Himangi Saraogi > > Acked-by: Julia Lawall > > No, you changed the relative order in which iio_device_unregister() and > adis_cleanup_buffer_and_trigger() are called, this opens up the way for race > conditions. Rule of thumb: Don't convert drivers to managed functions if this > will change the order in which functions will called on device removal. Thanks for the information. I was indeed not sure about this. Unfortunately, removal code is not always perfectly written, and the operations are not always done in the right order... julia > - Lars > > > --- > > drivers/staging/iio/accel/adis16203_core.c | 3 +-- > > 1 file changed, 1 insertion(+), 2 deletions(-) > > > > diff --git a/drivers/staging/iio/accel/adis16203_core.c > > b/drivers/staging/iio/accel/adis16203_core.c > > index 409a28e..5077779 100644 > > --- a/drivers/staging/iio/accel/adis16203_core.c > > +++ b/drivers/staging/iio/accel/adis16203_core.c > > @@ -175,7 +175,7 @@ static int adis16203_probe(struct spi_device *spi) > > if (ret) > > goto error_cleanup_buffer_trigger; > > > > - ret = iio_device_register(indio_dev); > > + ret = devm_iio_device_register(&spi->dev, indio_dev); > > if (ret) > > goto error_cleanup_buffer_trigger; > > > > @@ -191,7 +191,6 @@ static int adis16203_remove(struct spi_device *spi) > > struct iio_dev *indio_dev = spi_get_drvdata(spi); > > struct adis *st = iio_priv(indio_dev); > > > > - iio_device_unregister(indio_dev); > > adis_cleanup_buffer_and_trigger(st, indio_dev); > > > > return 0; > > > > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/