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authorLinus Torvalds <torvalds@linux-foundation.org>2021-08-14 19:22:42 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2021-08-14 19:22:42 +0300
commit118516e2127722e46c5c029010df4e8743bc9722 (patch)
tree90a91a65fcea04336aed2a93aa64eb408b767a43 /fs
parentdfa377c35d70c31139b1274ec49f87d380996c42 (diff)
parent769f52676756b8c5feb302d2d95af59577fc69ec (diff)
downloadlinux-118516e2127722e46c5c029010df4e8743bc9722.tar.xz
Merge tag 'configfs-5.14' of git://git.infradead.org/users/hch/configfs
Pull configfs fix from Christoph Hellwig: - fix to revert to the historic write behavior (Bart Van Assche) * tag 'configfs-5.14' of git://git.infradead.org/users/hch/configfs: configfs: restore the kernel v5.13 text attribute write behavior
Diffstat (limited to 'fs')
-rw-r--r--fs/configfs/file.c18
1 files changed, 6 insertions, 12 deletions
diff --git a/fs/configfs/file.c b/fs/configfs/file.c
index 5a0be9985bae..0ad32150611e 100644
--- a/fs/configfs/file.c
+++ b/fs/configfs/file.c
@@ -177,28 +177,22 @@ out:
return retval;
}
-/* Fill [buffer, buffer + pos) with data coming from @from. */
-static int fill_write_buffer(struct configfs_buffer *buffer, loff_t pos,
+/* Fill @buffer with data coming from @from. */
+static int fill_write_buffer(struct configfs_buffer *buffer,
struct iov_iter *from)
{
- loff_t to_copy;
int copied;
- u8 *to;
if (!buffer->page)
buffer->page = (char *)__get_free_pages(GFP_KERNEL, 0);
if (!buffer->page)
return -ENOMEM;
- to_copy = SIMPLE_ATTR_SIZE - 1 - pos;
- if (to_copy <= 0)
- return 0;
- to = buffer->page + pos;
- copied = copy_from_iter(to, to_copy, from);
+ copied = copy_from_iter(buffer->page, SIMPLE_ATTR_SIZE - 1, from);
buffer->needs_read_fill = 1;
/* if buf is assumed to contain a string, terminate it by \0,
* so e.g. sscanf() can scan the string easily */
- to[copied] = 0;
+ buffer->page[copied] = 0;
return copied ? : -EFAULT;
}
@@ -227,10 +221,10 @@ static ssize_t configfs_write_iter(struct kiocb *iocb, struct iov_iter *from)
{
struct file *file = iocb->ki_filp;
struct configfs_buffer *buffer = file->private_data;
- ssize_t len;
+ int len;
mutex_lock(&buffer->mutex);
- len = fill_write_buffer(buffer, iocb->ki_pos, from);
+ len = fill_write_buffer(buffer, from);
if (len > 0)
len = flush_write_buffer(file, buffer, len);
if (len > 0)