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(unknown [172.25.130.133]) by node4.com.cn (NSMail) with ESMTPA id C4E231600209E; Wed, 23 Oct 2024 08:54:41 +0000 (UTC) From: Jiayi Li To: gregkh@linuxfoundation.org, stern@rowland.harvard.edu, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org Cc: lijiayi@kylinos.cn Subject: [PATCH v3] usb: core: use sysfs_emit() instead of sprintf() Date: Wed, 23 Oct 2024 16:54:29 +0800 Message-ID: <20241023085429.2865488-1-lijiayi@kylinos.cn> X-Mailer: git-send-email 2.45.2 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Follow the advice in Documentation/filesystems/sysfs.rst: show() should only use sysfs_emit() or sysfs_emit_at() when formatting the value to be returned to user space. Signed-off-by: Jiayi Li --- V2 -> V3: Add description of changes from the previous version. V1 -> V2: Add #include --- drivers/usb/core/endpoint.c | 11 ++++++----- drivers/usb/core/ledtrig-usbport.c | 3 ++- drivers/usb/core/port.c | 11 ++++++----- 3 files changed, 14 insertions(+), 11 deletions(-) diff --git a/drivers/usb/core/endpoint.c b/drivers/usb/core/endpoint.c index 4b38b87a1343..e48399401608 100644 --- a/drivers/usb/core/endpoint.c +++ b/drivers/usb/core/endpoint.c @@ -14,6 +14,7 @@ #include #include #include +#include #include #include "usb.h" =20 @@ -39,7 +40,7 @@ static ssize_t field##_show(struct device *dev, \ char *buf) \ { \ struct ep_device *ep =3D to_ep_device(dev); \ - return sprintf(buf, format_string, ep->desc->field); \ + return sysfs_emit(buf, format_string, ep->desc->field); \ } \ static DEVICE_ATTR_RO(field) =20 @@ -52,7 +53,7 @@ static ssize_t wMaxPacketSize_show(struct device *dev, struct device_attribute *attr, char *buf) { struct ep_device *ep =3D to_ep_device(dev); - return sprintf(buf, "%04x\n", usb_endpoint_maxp(ep->desc)); + return sysfs_emit(buf, "%04x\n", usb_endpoint_maxp(ep->desc)); } static DEVICE_ATTR_RO(wMaxPacketSize); =20 @@ -76,7 +77,7 @@ static ssize_t type_show(struct device *dev, struct devic= e_attribute *attr, type =3D "Interrupt"; break; } - return sprintf(buf, "%s\n", type); + return sysfs_emit(buf, "%s\n", type); } static DEVICE_ATTR_RO(type); =20 @@ -95,7 +96,7 @@ static ssize_t interval_show(struct device *dev, struct d= evice_attribute *attr, interval /=3D 1000; } =20 - return sprintf(buf, "%d%cs\n", interval, unit); + return sysfs_emit(buf, "%d%cs\n", interval, unit); } static DEVICE_ATTR_RO(interval); =20 @@ -111,7 +112,7 @@ static ssize_t direction_show(struct device *dev, struc= t device_attribute *attr, direction =3D "in"; else direction =3D "out"; - return sprintf(buf, "%s\n", direction); + return sysfs_emit(buf, "%s\n", direction); } static DEVICE_ATTR_RO(direction); =20 diff --git a/drivers/usb/core/ledtrig-usbport.c b/drivers/usb/core/ledtrig-= usbport.c index 85c999f71ad7..5e3c515991f3 100644 --- a/drivers/usb/core/ledtrig-usbport.c +++ b/drivers/usb/core/ledtrig-usbport.c @@ -10,6 +10,7 @@ #include #include #include +#include #include #include =20 @@ -87,7 +88,7 @@ static ssize_t usbport_trig_port_show(struct device *dev, struct usbport_trig_port, attr); =20 - return sprintf(buf, "%d\n", port->observed) + 1; + return sysfs_emit(buf, "%d\n", port->observed) + 1; } =20 static ssize_t usbport_trig_port_store(struct device *dev, diff --git a/drivers/usb/core/port.c b/drivers/usb/core/port.c index e7da2fca11a4..45d7af00f8d1 100644 --- a/drivers/usb/core/port.c +++ b/drivers/usb/core/port.c @@ -9,6 +9,7 @@ =20 #include #include +#include #include #include #include @@ -166,7 +167,7 @@ static ssize_t location_show(struct device *dev, { struct usb_port *port_dev =3D to_usb_port(dev); =20 - return sprintf(buf, "0x%08x\n", port_dev->location); + return sysfs_emit(buf, "0x%08x\n", port_dev->location); } static DEVICE_ATTR_RO(location); =20 @@ -191,7 +192,7 @@ static ssize_t connect_type_show(struct device *dev, break; } =20 - return sprintf(buf, "%s\n", result); + return sysfs_emit(buf, "%s\n", result); } static DEVICE_ATTR_RO(connect_type); =20 @@ -210,7 +211,7 @@ static ssize_t over_current_count_show(struct device *d= ev, { struct usb_port *port_dev =3D to_usb_port(dev); =20 - return sprintf(buf, "%u\n", port_dev->over_current_count); + return sysfs_emit(buf, "%u\n", port_dev->over_current_count); } static DEVICE_ATTR_RO(over_current_count); =20 @@ -219,7 +220,7 @@ static ssize_t quirks_show(struct device *dev, { struct usb_port *port_dev =3D to_usb_port(dev); =20 - return sprintf(buf, "%08x\n", port_dev->quirks); + return sysfs_emit(buf, "%08x\n", port_dev->quirks); } =20 static ssize_t quirks_store(struct device *dev, struct device_attribute *a= ttr, @@ -254,7 +255,7 @@ static ssize_t usb3_lpm_permit_show(struct device *dev, p =3D "0"; } =20 - return sprintf(buf, "%s\n", p); + return sysfs_emit(buf, "%s\n", p); } =20 static ssize_t usb3_lpm_permit_store(struct device *dev, --=20 2.45.2