Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933363AbbELNq5 (ORCPT ); Tue, 12 May 2015 09:46:57 -0400 Received: from mail-wg0-f44.google.com ([74.125.82.44]:35789 "EHLO mail-wg0-f44.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932888AbbELNqz (ORCPT ); Tue, 12 May 2015 09:46:55 -0400 MIME-Version: 1.0 In-Reply-To: <1429174868-11953-3-git-send-email-robert.dolca@intel.com> References: <1429174868-11953-1-git-send-email-robert.dolca@intel.com> <1429174868-11953-3-git-send-email-robert.dolca@intel.com> Date: Tue, 12 May 2015 16:46:54 +0300 Message-ID: Subject: Re: [PATCH RFC 2/3] iio: Improve iio_trigger_register_with_dev to register trigger after device From: Daniel Baluta To: Robert Dolca Cc: "linux-iio@vger.kernel.org" , Jonathan Cameron , Linux Kernel Mailing List , Hartmut Knaack , Lars-Peter Clausen , Peter Meerwald , Denis CIOCCA Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3145 Lines: 84 On Thu, Apr 16, 2015 at 12:01 PM, Robert Dolca wrote: > Until now calling iio_trigger_register_with_dev after registering the IIO device > added the trigger to the device's trigger list and saved a reference to the > device in the trigger's struct but it did not create the symlink. > > In order to know if the device was registered or not this patch adds a flag > in the dev_iio struct and checks it when iio_trigger_register_with_dev is > called. I don't think we should care about this. In order for the symlink to be created the driver should call the right sequence of functions. > > Signed-off-by: Robert Dolca > --- > drivers/iio/industrialio-core.c | 4 ++++ > drivers/iio/industrialio-trigger.c | 6 ++++++ > include/linux/iio/iio.h | 1 + > 3 files changed, 11 insertions(+) > > diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c > index 94bcd54..04862a4 100644 > --- a/drivers/iio/industrialio-core.c > +++ b/drivers/iio/industrialio-core.c > @@ -1233,6 +1233,8 @@ int iio_device_register(struct iio_dev *indio_dev) > goto error_cdev_del; > } > > + indio_dev->registered = true; > + > return 0; > error_cdev_del: > cdev_del(&indio_dev->chrdev); > @@ -1281,6 +1283,8 @@ void iio_device_unregister(struct iio_dev *indio_dev) > mutex_unlock(&indio_dev->info_exist_lock); > > iio_buffer_free_sysfs_and_mask(indio_dev); > + > + indio_dev->registered = false; > } > EXPORT_SYMBOL(iio_device_unregister); > > diff --git a/drivers/iio/industrialio-trigger.c b/drivers/iio/industrialio-trigger.c > index cebdd10..d4118fe 100644 > --- a/drivers/iio/industrialio-trigger.c > +++ b/drivers/iio/industrialio-trigger.c > @@ -69,6 +69,12 @@ int iio_trigger_register_with_dev(struct iio_dev *indio_dev, > trig_info->indio_dev = indio_dev; > list_add(&trig_info->indio_dev_list, &indio_dev->triggers); > > + if (indio_dev->registered) { > + ret = iio_trigger_link(trig_info); > + if (ret < 0) > + goto error; > + } > + > return 0; > error: > return ret; > diff --git a/include/linux/iio/iio.h b/include/linux/iio/iio.h > index 9ff54ef..3f704ae 100644 > --- a/include/linux/iio/iio.h > +++ b/include/linux/iio/iio.h > @@ -496,6 +496,7 @@ struct iio_dev { > unsigned cached_reg_addr; > #endif > struct list_head triggers; > + bool registered; > }; > > const struct iio_chan_spec > -- > 1.9.1 > > -- > 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/ -- 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/