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From: Jens Axboe <axboe@kernel.dk>
To: linux-kernel@vger.kernel.org
Cc: Jens Axboe <axboe@kernel.dk>
Subject: [PATCH 273/437] watchdog: rc32434_wdt: convert to read/write iterators
Date: Thu, 11 Apr 2024 09:16:53 -0600
Message-ID: <20240411153126.16201-274-axboe@kernel.dk>
In-Reply-To: <20240411153126.16201-1-axboe@kernel.dk>
References: <20240411153126.16201-1-axboe@kernel.dk>
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Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 drivers/watchdog/rc32434_wdt.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/watchdog/rc32434_wdt.c b/drivers/watchdog/rc32434_wdt.c
index 417f9b75679c..76c046c9beb9 100644
--- a/drivers/watchdog/rc32434_wdt.c
+++ b/drivers/watchdog/rc32434_wdt.c
@@ -161,9 +161,9 @@ static int rc32434_wdt_release(struct inode *inode, struct file *file)
 	return 0;
 }
 
-static ssize_t rc32434_wdt_write(struct file *file, const char *data,
-				size_t len, loff_t *ppos)
+static ssize_t rc32434_wdt_write(struct kiocb *iocb, struct iov_iter *from)
 {
+	size_t len = iov_iter_count(from);
 	if (len) {
 		if (!nowayout) {
 			size_t i;
@@ -173,7 +173,7 @@ static ssize_t rc32434_wdt_write(struct file *file, const char *data,
 
 			for (i = 0; i != len; i++) {
 				char c;
-				if (get_user(c, data + i))
+				if (get_iter(c, from))
 					return -EFAULT;
 				if (c == 'V')
 					expect_close = 42;
@@ -243,7 +243,7 @@ static long rc32434_wdt_ioctl(struct file *file, unsigned int cmd,
 static const struct file_operations rc32434_wdt_fops = {
 	.owner		= THIS_MODULE,
 	.llseek		= no_llseek,
-	.write		= rc32434_wdt_write,
+	.write_iter	= rc32434_wdt_write,
 	.unlocked_ioctl	= rc32434_wdt_ioctl,
 	.compat_ioctl	= compat_ptr_ioctl,
 	.open		= rc32434_wdt_open,
-- 
2.43.0