linux-kernel - [PATCH 148/437] drm: armada: convert to read/write iterators

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Date: Thu, 11 Apr 2024 09:14:48 -0600
From: Jens Axboe <axboe@...nel.dk>
To: linux-kernel@...r.kernel.org
Cc: Jens Axboe <axboe@...nel.dk>
Subject: [PATCH 148/437] drm: armada: convert to read/write iterators

Signed-off-by: Jens Axboe <axboe@...nel.dk>
---
 drivers/gpu/drm/armada/armada_debugfs.c | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/armada/armada_debugfs.c b/drivers/gpu/drm/armada/armada_debugfs.c
index 29f4b52e3c8d..eaa0384a3bd4 100644
--- a/drivers/gpu/drm/armada/armada_debugfs.c
+++ b/drivers/gpu/drm/armada/armada_debugfs.c
@@ -48,22 +48,23 @@ static int armada_debugfs_crtc_reg_open(struct inode *inode, struct file *file)
 			   inode->i_private);
 }
 
-static int armada_debugfs_crtc_reg_write(struct file *file,
-	const char __user *ptr, size_t len, loff_t *off)
+static int armada_debugfs_crtc_reg_write(struct kiocb *iocb,
+					 struct iov_iter *from)
 {
+	size_t len = iov_iter_count(from);
 	struct armada_crtc *dcrtc;
 	unsigned long reg, mask, val;
 	char buf[32];
 	int ret;
 	u32 v;
 
-	if (*off != 0)
+	if (iocb->ki_pos != 0)
 		return 0;
 
 	if (len > sizeof(buf) - 1)
 		len = sizeof(buf) - 1;
 
-	ret = strncpy_from_user(buf, ptr, len);
+	ret = strncpy_from_iter(from, ptr, len);
 	if (ret < 0)
 		return ret;
 	buf[len] = '\0';
@@ -85,8 +86,8 @@ static int armada_debugfs_crtc_reg_write(struct file *file,
 static const struct file_operations armada_debugfs_crtc_reg_fops = {
 	.owner = THIS_MODULE,
 	.open = armada_debugfs_crtc_reg_open,
-	.read = seq_read,
-	.write = armada_debugfs_crtc_reg_write,
+	.read_iter = seq_read_iter,
+	.write_iter = armada_debugfs_crtc_reg_write,
 	.llseek = seq_lseek,
 	.release = single_release,
 };
-- 
2.43.0