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Wed, 25 Sep 2024 08:49:50 -0700 (PDT) Received: from [127.0.1.1] ([213.208.157.67]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-a9393133c51sm222861166b.189.2024.09.25.08.49.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 25 Sep 2024 08:49:48 -0700 (PDT) From: Javier Carrasco Date: Wed, 25 Sep 2024 17:49:46 +0200 Subject: [PATCH v2] usb: typec: ucsi: glink: use device_for_each_child_node_scoped() Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20240925-ucsi_glink-scoped-v2-1-a661585fff35@gmail.com> X-B4-Tracking: v=1; b=H4sIABkx9GYC/32NQQ6CMBBFr0JmbQ0tBIMr70GIKdNpmQiUtEo0p He3cgCX7yX//R0iBaYI12KHQBtH9ksGdSoAR704EmwygypVXTaqEi+MfHcTLw8R0a9khDK1vFh stTUV5N0ayPL7aHZ95pHj04fPcbHJn/1X26SQwpbWoCVs2mG4uVnzdEY/Q59S+gJHwKUzsgAAA A== To: Heikki Krogerus , Greg Kroah-Hartman Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, Javier Carrasco X-Mailer: b4 0.14-dev X-Developer-Signature: v=1; a=ed25519-sha256; t=1727279388; l=2431; i=javier.carrasco.cruz@gmail.com; s=20240312; h=from:subject:message-id; bh=5fEuuU3XfUFHtBatfpDH6icGp8TZ4uJv28CJVwS77Lo=; b=LmmyM+PjqIMF9yhYIe8WG4Jkw3i596y34lPHm3q9zy87UTIfQc98HEe3XXg4eN014LXk2exE4 0HCML1RST9dDszTvjWgw6Xv6190QLoUpE4Hx92yXKIOMODPsDgCSsR/ X-Developer-Key: i=javier.carrasco.cruz@gmail.com; a=ed25519; pk=lzSIvIzMz0JhJrzLXI0HAdPwsNPSSmEn6RbS+PTS9aQ= Use the scoped variant of `device_for_each_child_node()` to automatically handle early exits. This prevents memory leaks if new error paths are introduced, as no explicit refcount decrement via `fwnode_handle_put()` is needed. Reviewed-by: Heikki Krogerus Signed-off-by: Javier Carrasco Reviewed-by: Dmitry Baryshkov --- This patch is a follow-up to the recently introduced commit c68942624e25 ("usb: typec: ucsi: glink: fix child node release in probe function") to account for a safer approach to iterating over child nodes. --- Changes in v2: - Rebase onto v6.11 to apply without errors due to the previous patch mentioned in the cover letter. - Link to v1: https://lore.kernel.org/r/20240623-ucsi_glink-scoped-v1-1-f0f= dcfec69bb@gmail.com --- drivers/usb/typec/ucsi/ucsi_glink.c | 9 +++------ 1 file changed, 3 insertions(+), 6 deletions(-) diff --git a/drivers/usb/typec/ucsi/ucsi_glink.c b/drivers/usb/typec/ucsi/u= csi_glink.c index 6aace19d595b..41db51e486e0 100644 --- a/drivers/usb/typec/ucsi/ucsi_glink.c +++ b/drivers/usb/typec/ucsi/ucsi_glink.c @@ -322,7 +322,6 @@ static int pmic_glink_ucsi_probe(struct auxiliary_devic= e *adev, struct pmic_glink_ucsi *ucsi; struct device *dev =3D &adev->dev; const struct of_device_id *match; - struct fwnode_handle *fwnode; int ret; =20 ucsi =3D devm_kzalloc(dev, sizeof(*ucsi), GFP_KERNEL); @@ -354,14 +353,13 @@ static int pmic_glink_ucsi_probe(struct auxiliary_dev= ice *adev, =20 ucsi_set_drvdata(ucsi->ucsi, ucsi); =20 - device_for_each_child_node(dev, fwnode) { + device_for_each_child_node_scoped(dev, fwnode) { struct gpio_desc *desc; u32 port; =20 ret =3D fwnode_property_read_u32(fwnode, "reg", &port); if (ret < 0) { dev_err(dev, "missing reg property of %pOFn\n", fwnode); - fwnode_handle_put(fwnode); return ret; } =20 @@ -376,11 +374,10 @@ static int pmic_glink_ucsi_probe(struct auxiliary_dev= ice *adev, if (!desc) continue; =20 - if (IS_ERR(desc)) { - fwnode_handle_put(fwnode); + if (IS_ERR(desc)) return dev_err_probe(dev, PTR_ERR(desc), "unable to acquire orientation gpio\n"); - } + ucsi->port_orientation[port] =3D desc; } =20 --- base-commit: 98f7e32f20d28ec452afb208f9cffc08448a2652 change-id: 20240623-ucsi_glink-scoped-2d417fc9afd3 Best regards, --=20 Javier Carrasco