switch generic_write_checks() to iocb and iter
... returning -E... upon error and amount of data left in iter after
(possible) truncation upon success. Note, that normal case gives
a non-zero (positive) return value, so any tests for != 0 _must_ be
updated.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Conflicts:
fs/ext4/file.c
diff --git a/fs/ncpfs/file.c b/fs/ncpfs/file.c
index ab6363b..011324c 100644
--- a/fs/ncpfs/file.c
+++ b/fs/ncpfs/file.c
@@ -170,20 +170,15 @@
struct file *file = iocb->ki_filp;
struct inode *inode = file_inode(file);
size_t already_written = 0;
- loff_t pos = iocb->ki_pos;
- size_t count = iov_iter_count(from);
size_t bufsize;
int errno;
void *bouncebuffer;
+ off_t pos;
ncp_dbg(1, "enter %pD2\n", file);
- errno = generic_write_checks(file, &pos, &count);
- if (errno)
+ errno = generic_write_checks(iocb, from);
+ if (errno <= 0)
return errno;
- iov_iter_truncate(from, count);
-
- if (!count)
- return 0;
errno = ncp_make_open(inode, O_WRONLY);
if (errno) {
@@ -201,10 +196,11 @@
errno = -EIO; /* -ENOMEM */
goto outrel;
}
+ pos = iocb->ki_pos;
while (iov_iter_count(from)) {
int written_this_time;
size_t to_write = min_t(size_t,
- bufsize - ((off_t)pos % bufsize),
+ bufsize - (pos % bufsize),
iov_iter_count(from));
if (copy_from_iter(bouncebuffer, to_write, from) != to_write) {