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tty: don't pass write() to do_tty_write()

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write() passed to do_tty_write() is always ld->ops->write(). Instead,
align with iterate_tty_read() and pass the whole ld instead. This makes
the code easier to follow as it is clear what the write is. And also the
function signature is more readable.

Signed-off-by: "Jiri Slaby (SUSE)" <jirislaby@kernel.org>
Link: https://lore.kernel.org/r/20230810091510.13006-22-jirislaby@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jiri Slaby (SUSE) 2023-08-10 11:14:55 +02:00 committed by Greg Kroah-Hartman
parent b97552eb06
commit f47a4fd67f
1 changed files with 4 additions and 7 deletions
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11
drivers/tty/tty_io.c
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@ -961,11 +961,8 @@ int tty_write_lock(struct tty_struct *tty, bool ndelay)
* Split writes up in sane blocksizes to avoid
* denial-of-service type attacks
*/
static inline ssize_t do_tty_write(
ssize_t (*write)(struct tty_struct *, struct file *, const unsigned char *, size_t),
struct tty_struct *tty,
struct file *file,
struct iov_iter *from)
static inline ssize_t do_tty_write(struct tty_ldisc *ld, struct tty_struct *tty,
struct file *file, struct iov_iter *from)
{
size_t count = iov_iter_count(from);
ssize_t ret, written = 0;
@ -1022,7 +1019,7 @@ static inline ssize_t do_tty_write(
if (copy_from_iter(tty->write_buf, size, from) != size)
break;
ret = write(tty, file, tty->write_buf, size);
ret = ld->ops->write(tty, file, tty->write_buf, size);
if (ret <= 0)
break;
@ -1093,7 +1090,7 @@ static ssize_t file_tty_write(struct file *file, struct kiocb *iocb, struct iov_
if (!ld->ops->write)
ret = -EIO;
else
ret = do_tty_write(ld->ops->write, tty, file, from);
ret = do_tty_write(ld, tty, file, from);
tty_ldisc_deref(ld);
return ret;
}