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 <johan@xxxxxxxxxx>
---
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);
--
2.13.0
--
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