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serial: rate limit custom-speed deprecation notice

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Contrary to what a comment claimed, the ASYNC_SPD flags and custom
divisor can be set by a non-privileged user so rate limit the
deprecation notice as was intended.

Signed-off-by: Johan Hovold <johan@kernel.org>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Johan Hovold 2017-06-06 12:54:33 +02:00 committed by Greg Kroah-Hartman
parent 54ebbfb160
commit dc2f727159
1 changed files with 2 additions and 3 deletions
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5
drivers/tty/serial/serial_core.c
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@ -954,11 +954,10 @@ static int uart_set_info(struct tty_struct *tty, struct tty_port *port,
old_custom_divisor != uport->custom_divisor) {
/*
* If they're setting up a custom divisor or speed,
* instead of clearing it, then bitch about it. No
* need to rate-limit; it's CAP_SYS_ADMIN only.
* instead of clearing it, then bitch about it.
*/
if (uport->flags & UPF_SPD_MASK) {
dev_notice(uport->dev,
dev_notice_ratelimited(uport->dev,
"%s sets custom speed on %s. This is deprecated.\n",
current->comm,
tty_name(port->tty));