From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751788AbdBNSYP (ORCPT ); Tue, 14 Feb 2017 13:24:15 -0500 Received: from mail-oi0-f66.google.com ([209.85.218.66]:35743 "EHLO mail-oi0-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751596AbdBNSXq (ORCPT ); Tue, 14 Feb 2017 13:23:46 -0500 From: Dmitry Torokhov To: Richard Cochran Cc: "David S. Miller" , netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 4/4] ptp: create "pins" together with the rest of attributes Date: Tue, 14 Feb 2017 10:23:34 -0800 Message-Id: <20170214182334.23296-5-dmitry.torokhov@gmail.com> X-Mailer: git-send-email 2.11.0.483.g087da7b7c-goog In-Reply-To: <20170214182334.23296-1-dmitry.torokhov@gmail.com> References: <20170214182334.23296-1-dmitry.torokhov@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Let's switch to using device_create_with_groups(), which will allow us to create "pins" attribute group together with the rest of ptp device attributes, and before userspace gets notified about ptp device creation. Signed-off-by: Dmitry Torokhov --- drivers/ptp/ptp_clock.c | 20 +++++++++++--------- drivers/ptp/ptp_private.h | 7 ++++--- drivers/ptp/ptp_sysfs.c | 39 +++++++++------------------------------ 3 files changed, 24 insertions(+), 42 deletions(-) diff --git a/drivers/ptp/ptp_clock.c b/drivers/ptp/ptp_clock.c index b4e5e8022c29..e8142803a1a7 100644 --- a/drivers/ptp/ptp_clock.c +++ b/drivers/ptp/ptp_clock.c @@ -221,16 +221,17 @@ struct ptp_clock *ptp_clock_register(struct ptp_clock_info *info, mutex_init(&ptp->pincfg_mux); init_waitqueue_head(&ptp->tsev_wq); + err = ptp_populate_pin_groups(ptp); + if (err) + goto no_pin_groups; + /* Create a new device in our class. */ - ptp->dev = device_create(ptp_class, parent, ptp->devid, ptp, - "ptp%d", ptp->index); + ptp->dev = device_create_with_groups(ptp_class, parent, ptp->devid, + ptp, ptp->pin_attr_groups, + "ptp%d", ptp->index); if (IS_ERR(ptp->dev)) goto no_device; - err = ptp_populate_sysfs(ptp); - if (err) - goto no_sysfs; - /* Register a new PPS source. */ if (info->pps) { struct pps_source_info pps; @@ -258,10 +259,10 @@ struct ptp_clock *ptp_clock_register(struct ptp_clock_info *info, if (ptp->pps_source) pps_unregister_source(ptp->pps_source); no_pps: - ptp_cleanup_sysfs(ptp); -no_sysfs: device_destroy(ptp_class, ptp->devid); no_device: + ptp_cleanup_pin_groups(ptp); +no_pin_groups: mutex_destroy(&ptp->tsevq_mux); mutex_destroy(&ptp->pincfg_mux); ida_simple_remove(&ptp_clocks_map, index); @@ -280,8 +281,9 @@ int ptp_clock_unregister(struct ptp_clock *ptp) /* Release the clock's resources. */ if (ptp->pps_source) pps_unregister_source(ptp->pps_source); - ptp_cleanup_sysfs(ptp); + device_destroy(ptp_class, ptp->devid); + ptp_cleanup_pin_groups(ptp); posix_clock_unregister(&ptp->clock); return 0; diff --git a/drivers/ptp/ptp_private.h b/drivers/ptp/ptp_private.h index 9c5d41421b65..d95888974d0c 100644 --- a/drivers/ptp/ptp_private.h +++ b/drivers/ptp/ptp_private.h @@ -54,6 +54,8 @@ struct ptp_clock { struct device_attribute *pin_dev_attr; struct attribute **pin_attr; struct attribute_group pin_attr_group; + /* 1st entry is a pointer to the real group, 2nd is NULL terminator */ + const struct attribute_group *pin_attr_groups[2]; }; /* @@ -94,8 +96,7 @@ uint ptp_poll(struct posix_clock *pc, extern const struct attribute_group *ptp_groups[]; -int ptp_cleanup_sysfs(struct ptp_clock *ptp); - -int ptp_populate_sysfs(struct ptp_clock *ptp); +int ptp_populate_pin_groups(struct ptp_clock *ptp); +void ptp_cleanup_pin_groups(struct ptp_clock *ptp); #endif diff --git a/drivers/ptp/ptp_sysfs.c b/drivers/ptp/ptp_sysfs.c index 426e42c51df4..48401dfcd999 100644 --- a/drivers/ptp/ptp_sysfs.c +++ b/drivers/ptp/ptp_sysfs.c @@ -268,25 +268,14 @@ static ssize_t ptp_pin_store(struct device *dev, struct device_attribute *attr, return count; } -int ptp_cleanup_sysfs(struct ptp_clock *ptp) +int ptp_populate_pin_groups(struct ptp_clock *ptp) { - struct device *dev = ptp->dev; - struct ptp_clock_info *info = ptp->info; - - if (info->n_pins) { - sysfs_remove_group(&dev->kobj, &ptp->pin_attr_group); - kfree(ptp->pin_attr); - kfree(ptp->pin_dev_attr); - } - return 0; -} - -static int ptp_populate_pins(struct ptp_clock *ptp) -{ - struct device *dev = ptp->dev; struct ptp_clock_info *info = ptp->info; int err = -ENOMEM, i, n_pins = info->n_pins; + if (!n_pins) + return 0; + ptp->pin_dev_attr = kcalloc(n_pins, sizeof(*ptp->pin_dev_attr), GFP_KERNEL); if (!ptp->pin_dev_attr) @@ -309,28 +298,18 @@ static int ptp_populate_pins(struct ptp_clock *ptp) ptp->pin_attr_group.name = "pins"; ptp->pin_attr_group.attrs = ptp->pin_attr; - err = sysfs_create_group(&dev->kobj, &ptp->pin_attr_group); - if (err) - goto no_group; + ptp->pin_attr_groups[0] = &ptp->pin_attr_group; + return 0; -no_group: - kfree(ptp->pin_attr); no_pin_attr: kfree(ptp->pin_dev_attr); no_dev_attr: return err; } -int ptp_populate_sysfs(struct ptp_clock *ptp) +void ptp_cleanup_pin_groups(struct ptp_clock *ptp) { - struct ptp_clock_info *info = ptp->info; - int err; - - if (info->n_pins) { - err = ptp_populate_pins(ptp); - if (err) - return err; - } - return 0; + kfree(ptp->pin_attr); + kfree(ptp->pin_dev_attr); } -- 2.11.0.483.g087da7b7c-goog