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mxser: remove MOXA_ASPP_OQUEUE ioctl

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1) The semantics are defined exactly nowhere.
2) The ioctl definition was never exposed to userspace, so noone should
   actually be reliably using this.
3) It's not even mentioned in any of the mxser utilities.

Provided the above, remove this mxser-special ioctl.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20210618061516.662-30-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jiri Slaby 2021-06-18 08:14:35 +02:00 committed by Greg Kroah-Hartman
parent c94deae5b7
commit a7574ca74a
1 changed files with 0 additions and 13 deletions
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13
drivers/tty/mxser.c
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@ -60,8 +60,6 @@
#define RS485_4WIRE_MODE 3
#define OP_MODE_MASK 3
#define MOXA_ASPP_OQUEUE (MOXA + 70)
/* --------------------------------------------------- */
/*
@ -1499,17 +1497,6 @@ static int mxser_ioctl(struct tty_struct *tty,
mxser_cflags_changed(info, arg, &cnow));
case MOXA_HighSpeedOn:
return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *)argp);
case MOXA_ASPP_OQUEUE:{
int len, lsr;
len = mxser_chars_in_buffer(tty);
spin_lock_irq(&info->slock);
lsr = inb(info->ioaddr + UART_LSR) & UART_LSR_THRE;
spin_unlock_irq(&info->slock);
len += (lsr ? 0 : 1);
return put_user(len, (int __user *)argp);
}
default:
return -ENOIOCTLCMD;
}