linux-kernel - [PATCH 242/437] watchdog: ibmasr: convert to read/write iterators

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Message-ID: <20240411153126.16201-243-axboe@kernel.dk>
Date: Thu, 11 Apr 2024 09:16:22 -0600
From: Jens Axboe <axboe@...nel.dk>
To: linux-kernel@...r.kernel.org
Cc: Jens Axboe <axboe@...nel.dk>
Subject: [PATCH 242/437] watchdog: ibmasr: convert to read/write iterators

Signed-off-by: Jens Axboe <axboe@...nel.dk>
---
 drivers/watchdog/ibmasr.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/watchdog/ibmasr.c b/drivers/watchdog/ibmasr.c
index 6955c693b5fd..6f0931f33a6d 100644
--- a/drivers/watchdog/ibmasr.c
+++ b/drivers/watchdog/ibmasr.c
@@ -243,9 +243,9 @@ static int __init asr_get_base_address(void)
 }
 
 
-static ssize_t asr_write(struct file *file, const char __user *buf,
-			 size_t count, loff_t *ppos)
+static ssize_t asr_write(struct kiocb *iocb, struct iov_iter *from)
 {
+	size_t count = iov_iter_count(from);
 	if (count) {
 		if (!nowayout) {
 			size_t i;
@@ -255,7 +255,7 @@ static ssize_t asr_write(struct file *file, const char __user *buf,
 
 			for (i = 0; i != count; i++) {
 				char c;
-				if (get_user(c, buf + i))
+				if (get_iter(c, from))
 					return -EFAULT;
 				if (c == 'V')
 					asr_expect_close = 42;
@@ -341,7 +341,7 @@ static int asr_release(struct inode *inode, struct file *file)
 static const struct file_operations asr_fops = {
 	.owner =		THIS_MODULE,
 	.llseek =		no_llseek,
-	.write =		asr_write,
+	.write_iter =		asr_write,
 	.unlocked_ioctl =	asr_ioctl,
 	.compat_ioctl =		compat_ptr_ioctl,
 	.open =			asr_open,
-- 
2.43.0