From: Michal Schmidt <mschmidt@redhat.com>
To: Rodolfo Giometti <giometti@enneenne.com>
Cc: "Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>,
"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
"Christophe JAILLET" <christophe.jaillet@wanadoo.fr>,
"Dr. David Alan Gilbert" <linux@treblig.org>,
"Ma Ke" <make24@iscas.ac.cn>,
"Andrew Morton" <akpm@linux-foundation.org>,
"George Spelvin" <linux@horizon.com>,
linux-kernel@vger.kernel.org
Subject: [PATCH 6/6] pps: use cdev_device_add()
Date: Mon, 2 Dec 2024 17:34:51 +0100 [thread overview]
Message-ID: <20241202163451.1442566-7-mschmidt@redhat.com> (raw)
In-Reply-To: <20241202163451.1442566-1-mschmidt@redhat.com>
The cdev_set_parent() + cdev_add() + device_add() sequence is just
open-coded cdev_device_add(). Use it.
Signed-off-by: Michal Schmidt <mschmidt@redhat.com>
---
drivers/pps/pps.c | 12 +++---------
1 file changed, 3 insertions(+), 9 deletions(-)
diff --git a/drivers/pps/pps.c b/drivers/pps/pps.c
index 64a8b34aa4ce..89b502855e7b 100644
--- a/drivers/pps/pps.c
+++ b/drivers/pps/pps.c
@@ -361,13 +361,10 @@ int pps_register_cdev(struct pps_device *pps)
goto put_dev;
cdev_init(&pps->cdev, &pps_cdev_fops);
pps->cdev.owner = pps->info.owner;
- cdev_set_parent(&pps->cdev, &pps->dev.kobj);
- err = cdev_add(&pps->cdev, devt, 1);
+
+ err = cdev_device_add(&pps->cdev, &pps->dev);
if (err)
goto put_dev;
- err = device_add(&pps->dev);
- if (err)
- goto del_cdev;
/* Override the release function with our own */
pps->dev.release = pps_device_destruct;
@@ -377,8 +374,6 @@ int pps_register_cdev(struct pps_device *pps)
return 0;
-del_cdev:
- cdev_del(&pps->cdev);
put_dev:
put_device(&pps->dev);
scoped_guard(mutex, &pps_idr_lock)
@@ -392,8 +387,7 @@ void pps_unregister_cdev(struct pps_device *pps)
{
pr_debug("unregistering pps%d\n", pps->id);
pps->lookup_cookie = NULL;
- device_del(&pps->dev);
- cdev_del(&pps->cdev);
+ cdev_device_del(&pps->cdev, &pps->dev);
put_device(&pps->dev);
}
--
2.47.0
next prev parent reply other threads:[~2024-12-02 16:35 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-12-02 16:34 [PATCH 0/6] pps: fix a UAF and clean up code Michal Schmidt
2024-12-02 16:34 ` [PATCH 1/6] pps: fix cdev use-after-free Michal Schmidt
2024-12-02 16:34 ` [PATCH 2/6] pps: simplify pps_idr_lock locking Michal Schmidt
2024-12-02 16:34 ` [PATCH 3/6] pps: use scoped_guard for pps_idr_lock Michal Schmidt
2024-12-03 9:06 ` Uwe Kleine-König
2024-12-02 16:34 ` [PATCH 4/6] pps: print error in both cdev and dev error paths in pps_register_cdev() Michal Schmidt
2024-12-02 16:34 ` [PATCH 5/6] pps: embed "dev" in the pps_device Michal Schmidt
2024-12-03 1:02 ` kernel test robot
2024-12-03 2:04 ` kernel test robot
2024-12-02 16:34 ` Michal Schmidt [this message]
2024-12-02 16:56 ` [PATCH 0/6] pps: fix a UAF and clean up code Calvin Owens
2024-12-02 17:58 ` Michal Schmidt
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