linux-kernel - [PATCH] serial: core: use sysfs

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Date: Fri, 29 Mar 2024 21:06:34 +0300
From: Nikita Kiryushin <kiryushin@...ud.ru>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Nikita Kiryushin <kiryushin@...ud.ru>,
	Jiri Slaby <jirislaby@...nel.org>,
	Tony Lindgren <tony@...mide.com>,
	Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
	Lino Sanfilippo <l.sanfilippo@...bus.com>,
	John Ogness <john.ogness@...utronix.de>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	linux-kernel@...r.kernel.org,
	linux-serial@...r.kernel.org,
	lvc-project@...uxtesting.org
Subject: [PATCH] serial: core: use sysfs_emit() in sysfs show handlers

Change sprintf() in sysfs show() handlers to sysfs_emit(),
as recommended by sysfs documentation.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Signed-off-by: Nikita Kiryushin <kiryushin@...ud.ru>
---
 drivers/tty/serial/serial_core.c | 28 ++++++++++++++--------------
 1 file changed, 14 insertions(+), 14 deletions(-)

diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index ff85ebd3a007..a80b6aab2d98 100644
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -2903,7 +2903,7 @@ static ssize_t uartclk_show(struct device *dev,
 	struct tty_port *port = dev_get_drvdata(dev);
 
 	uart_get_info(port, &tmp);
-	return sprintf(buf, "%d\n", tmp.baud_base * 16);
+	return sysfs_emit(buf, "%d\n", tmp.baud_base * 16);
 }
 
 static ssize_t type_show(struct device *dev,
@@ -2913,7 +2913,7 @@ static ssize_t type_show(struct device *dev,
 	struct tty_port *port = dev_get_drvdata(dev);
 
 	uart_get_info(port, &tmp);
-	return sprintf(buf, "%d\n", tmp.type);
+	return sysfs_emit(buf, "%d\n", tmp.type);
 }
 
 static ssize_t line_show(struct device *dev,
@@ -2923,7 +2923,7 @@ static ssize_t line_show(struct device *dev,
 	struct tty_port *port = dev_get_drvdata(dev);
 
 	uart_get_info(port, &tmp);
-	return sprintf(buf, "%d\n", tmp.line);
+	return sysfs_emit(buf, "%d\n", tmp.line);
 }
 
 static ssize_t port_show(struct device *dev,
@@ -2937,7 +2937,7 @@ static ssize_t port_show(struct device *dev,
 	ioaddr = tmp.port;
 	if (HIGH_BITS_OFFSET)
 		ioaddr |= (unsigned long)tmp.port_high << HIGH_BITS_OFFSET;
-	return sprintf(buf, "0x%lX\n", ioaddr);
+	return sysfs_emit(buf, "0x%lX\n", ioaddr);
 }
 
 static ssize_t irq_show(struct device *dev,
@@ -2947,7 +2947,7 @@ static ssize_t irq_show(struct device *dev,
 	struct tty_port *port = dev_get_drvdata(dev);
 
 	uart_get_info(port, &tmp);
-	return sprintf(buf, "%d\n", tmp.irq);
+	return sysfs_emit(buf, "%d\n", tmp.irq);
 }
 
 static ssize_t flags_show(struct device *dev,
@@ -2957,7 +2957,7 @@ static ssize_t flags_show(struct device *dev,
 	struct tty_port *port = dev_get_drvdata(dev);
 
 	uart_get_info(port, &tmp);
-	return sprintf(buf, "0x%X\n", tmp.flags);
+	return sysfs_emit(buf, "0x%X\n", tmp.flags);
 }
 
 static ssize_t xmit_fifo_size_show(struct device *dev,
@@ -2967,7 +2967,7 @@ static ssize_t xmit_fifo_size_show(struct device *dev,
 	struct tty_port *port = dev_get_drvdata(dev);
 
 	uart_get_info(port, &tmp);
-	return sprintf(buf, "%d\n", tmp.xmit_fifo_size);
+	return sysfs_emit(buf, "%d\n", tmp.xmit_fifo_size);
 }
 
 static ssize_t close_delay_show(struct device *dev,
@@ -2977,7 +2977,7 @@ static ssize_t close_delay_show(struct device *dev,
 	struct tty_port *port = dev_get_drvdata(dev);
 
 	uart_get_info(port, &tmp);
-	return sprintf(buf, "%d\n", tmp.close_delay);
+	return sysfs_emit(buf, "%d\n", tmp.close_delay);
 }
 
 static ssize_t closing_wait_show(struct device *dev,
@@ -2987,7 +2987,7 @@ static ssize_t closing_wait_show(struct device *dev,
 	struct tty_port *port = dev_get_drvdata(dev);
 
 	uart_get_info(port, &tmp);
-	return sprintf(buf, "%d\n", tmp.closing_wait);
+	return sysfs_emit(buf, "%d\n", tmp.closing_wait);
 }
 
 static ssize_t custom_divisor_show(struct device *dev,
@@ -2997,7 +2997,7 @@ static ssize_t custom_divisor_show(struct device *dev,
 	struct tty_port *port = dev_get_drvdata(dev);
 
 	uart_get_info(port, &tmp);
-	return sprintf(buf, "%d\n", tmp.custom_divisor);
+	return sysfs_emit(buf, "%d\n", tmp.custom_divisor);
 }
 
 static ssize_t io_type_show(struct device *dev,
@@ -3007,7 +3007,7 @@ static ssize_t io_type_show(struct device *dev,
 	struct tty_port *port = dev_get_drvdata(dev);
 
 	uart_get_info(port, &tmp);
-	return sprintf(buf, "%d\n", tmp.io_type);
+	return sysfs_emit(buf, "%d\n", tmp.io_type);
 }
 
 static ssize_t iomem_base_show(struct device *dev,
@@ -3017,7 +3017,7 @@ static ssize_t iomem_base_show(struct device *dev,
 	struct tty_port *port = dev_get_drvdata(dev);
 
 	uart_get_info(port, &tmp);
-	return sprintf(buf, "0x%lX\n", (unsigned long)tmp.iomem_base);
+	return sysfs_emit(buf, "0x%lX\n", (unsigned long)tmp.iomem_base);
 }
 
 static ssize_t iomem_reg_shift_show(struct device *dev,
@@ -3027,7 +3027,7 @@ static ssize_t iomem_reg_shift_show(struct device *dev,
 	struct tty_port *port = dev_get_drvdata(dev);
 
 	uart_get_info(port, &tmp);
-	return sprintf(buf, "%d\n", tmp.iomem_reg_shift);
+	return sysfs_emit(buf, "%d\n", tmp.iomem_reg_shift);
 }
 
 static ssize_t console_show(struct device *dev,
@@ -3044,7 +3044,7 @@ static ssize_t console_show(struct device *dev,
 		console = uart_console_registered(uport);
 	mutex_unlock(&port->mutex);
 
-	return sprintf(buf, "%c\n", console ? 'Y' : 'N');
+	return sysfs_emit(buf, "%c\n", console ? 'Y' : 'N');
 }
 
 static ssize_t console_store(struct device *dev,
-- 
2.34.1