Messages in this thread Patch in this message | | | From | "Jiri Slaby (SUSE)" <> | Subject | [PATCH 13/15] tty: early return from send_break() on TTY_DRIVER_HARDWARE_BREAK | Date | Tue, 19 Sep 2023 10:51:54 +0200 |
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If the driver sets TTY_DRIVER_HARDWARE_BREAK, we leave ops->break_ctl() to the driver and return from send_break(). But we do it using a local variable and keep the code flowing through the end of the function. Instead, do 'return' immediately with the ops->break_ctl()'s return value.
This way, we don't have to stuff the 'else' branch of the 'if' with the software break handling. And we can re-indent the function too.
Signed-off-by: Jiri Slaby (SUSE) <jirislaby@kernel.org> --- drivers/tty/tty_io.c | 32 +++++++++++++++++--------------- 1 file changed, 17 insertions(+), 15 deletions(-)
diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c index 2ed12ca7c832..87bb5094e0bb 100644 --- a/drivers/tty/tty_io.c +++ b/drivers/tty/tty_io.c @@ -2475,22 +2475,24 @@ static int send_break(struct tty_struct *tty, unsigned int duration) return 0; if (tty->driver->flags & TTY_DRIVER_HARDWARE_BREAK) - retval = tty->ops->break_ctl(tty, duration); - else { - /* Do the work ourselves */ - if (tty_write_lock(tty, false) < 0) - return -EINTR; - retval = tty->ops->break_ctl(tty, -1); - if (retval) - goto out; - if (!signal_pending(current)) - msleep_interruptible(duration); - retval = tty->ops->break_ctl(tty, 0); + return tty->ops->break_ctl(tty, duration); + + /* Do the work ourselves */ + if (tty_write_lock(tty, false) < 0) + return -EINTR; + + retval = tty->ops->break_ctl(tty, -1); + if (retval) + goto out; + if (!signal_pending(current)) + msleep_interruptible(duration); + retval = tty->ops->break_ctl(tty, 0); out: - tty_write_unlock(tty); - if (signal_pending(current)) - retval = -EINTR; - } + tty_write_unlock(tty); + + if (signal_pending(current)) + retval = -EINTR; + return retval; } -- 2.42.0
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