From 48a7bd1178048d0b9a8e365272756acbf5cc1ccd Mon Sep 17 00:00:00 2001 From: Johan Hovold Date: Tue, 6 Jun 2017 12:54:39 +0200 Subject: [PATCH] tty: rocket: drop broken alt-speed support Setting an alt_speed using the ROCKET_SPD flags has been deprecated since v2.1.69, and has been broken since commit 6865ff222cca ("TTY: do not warn about setting speed via SPD_*") without anyone noticing. To make things worse commit 6df3526b6649 ("rocket: first pass at termios reporting") in v2.6.25 started reporting back the actual baud rate used, something which also required 38400 to again be set whenever changing a SPD flag. Drop the broken alt-speed handling altogether, and add a ratelimited warning about using TIOCCSERIAL to change speed as being deprecated. Note that the rocket driver has never supported using a custom divisor (ASYNC_SPD_CUST equivalent). Signed-off-by: Johan Hovold Reviewed-by: Andy Shevchenko Reviewed-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/rocket.c | 27 ++++++--------------------- 1 file changed, 6 insertions(+), 21 deletions(-) diff --git a/drivers/tty/rocket.c b/drivers/tty/rocket.c index b51a877da986..20d79a6007d5 100644 --- a/drivers/tty/rocket.c +++ b/drivers/tty/rocket.c @@ -947,18 +947,6 @@ static int rp_open(struct tty_struct *tty, struct file *filp) tty_port_set_initialized(&info->port, 1); - /* - * Set up the tty->alt_speed kludge - */ - if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_HI) - tty->alt_speed = 57600; - if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_VHI) - tty->alt_speed = 115200; - if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_SHI) - tty->alt_speed = 230400; - if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_WARP) - tty->alt_speed = 460800; - configure_r_port(tty, info, NULL); if (C_BAUD(tty)) { sSetDTR(cp); @@ -1219,23 +1207,20 @@ static int set_config(struct tty_struct *tty, struct r_port *info, return -EPERM; } info->flags = ((info->flags & ~ROCKET_USR_MASK) | (new_serial.flags & ROCKET_USR_MASK)); - configure_r_port(tty, info, NULL); mutex_unlock(&info->port.mutex); return 0; } + if ((new_serial.flags ^ info->flags) & ROCKET_SPD_MASK) { + /* warn about deprecation, unless clearing */ + if (new_serial.flags & ROCKET_SPD_MASK) + dev_warn_ratelimited(tty->dev, "use of SPD flags is deprecated\n"); + } + info->flags = ((info->flags & ~ROCKET_FLAGS) | (new_serial.flags & ROCKET_FLAGS)); info->port.close_delay = new_serial.close_delay; info->port.closing_wait = new_serial.closing_wait; - if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_HI) - tty->alt_speed = 57600; - if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_VHI) - tty->alt_speed = 115200; - if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_SHI) - tty->alt_speed = 230400; - if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_WARP) - tty->alt_speed = 460800; mutex_unlock(&info->port.mutex); configure_r_port(tty, info, NULL); -- 2.20.1