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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 4/6] pps: print error in both cdev and dev error paths in pps_register_cdev()
Date: Mon,  2 Dec 2024 17:34:49 +0100	[thread overview]
Message-ID: <20241202163451.1442566-5-mschmidt@redhat.com> (raw)
In-Reply-To: <20241202163451.1442566-1-mschmidt@redhat.com>

For pps, a device_create() failure is just as severe as a cdev_add()
failure. Print the error message in both cases.

Signed-off-by: Michal Schmidt <mschmidt@redhat.com>
---
 drivers/pps/pps.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/pps/pps.c b/drivers/pps/pps.c
index 92be7815a621..f90ee483d343 100644
--- a/drivers/pps/pps.c
+++ b/drivers/pps/pps.c
@@ -357,11 +357,9 @@ int pps_register_cdev(struct pps_device *pps)
 	pps->cdev.owner = pps->info.owner;
 
 	err = cdev_add(&pps->cdev, devt, 1);
-	if (err) {
-		pr_err("%s: failed to add char device %d:%d\n",
-				pps->info.name, MAJOR(pps_devt), pps->id);
+	if (err)
 		goto free_idr;
-	}
+
 	pps->dev = device_create(pps_class, pps->info.dev, devt, pps,
 							"pps%d", pps->id);
 	if (IS_ERR(pps->dev)) {
@@ -387,6 +385,8 @@ int pps_register_cdev(struct pps_device *pps)
 free_idr:
 	scoped_guard(mutex, &pps_idr_lock)
 		idr_remove(&pps_idr, pps->id);
+	pr_err("%s: failed to add char device %d:%d\n",
+	       pps->info.name, MAJOR(pps_devt), pps->id);
 	return err;
 }
 
-- 
2.47.0


  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 ` Michal Schmidt [this message]
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 ` [PATCH 6/6] pps: use cdev_device_add() Michal Schmidt
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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