mxser: remove MOXA_ASPP_LSTATUS ioctl

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/20210618061516.662-26-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/mxser.c b/drivers/tty/mxser.c
index 68c2f2346dcf06448fd6e6dc82bf39249c73c901..38e12ff175296af8c17ee6033e4689f6b539b90c 100644 (file)
--- a/drivers/tty/mxser.c
+++ b/drivers/tty/mxser.c
@@ -64,16 +64,9 @@
 #define OP_MODE_MASK           3
 
 #define MOXA_ASPP_OQUEUE       (MOXA + 70)
-#define MOXA_ASPP_LSTATUS      (MOXA + 74)
 
 /* --------------------------------------------------- */
 
-#define NPPI_NOTIFY_PARITY     0x01
-#define NPPI_NOTIFY_FRAMING    0x02
-#define NPPI_NOTIFY_HW_OVERRUN 0x04
-#define NPPI_NOTIFY_SW_OVERRUN 0x08
-#define NPPI_NOTIFY_BREAK      0x10
-
 /*
  * Follow just what Moxa Must chip defines.
  *
@@ -304,7 +297,6 @@ struct mxser_port {
        unsigned char ldisc_stop_rx;
 
        int custom_divisor;
-       unsigned char err_shadow;
 
        struct async_icount icount; /* kernel counters for 4 input interrupts */
        unsigned int timeout;
@@ -1601,13 +1593,6 @@ static int mxser_ioctl(struct tty_struct *tty,
 
                return put_user(len, (int __user *)argp);
        }
-       case MOXA_ASPP_LSTATUS: {
-               if (put_user(info->err_shadow, (unsigned char __user *)argp))
-                       return -EFAULT;
-
-               info->err_shadow = 0;
-               return 0;
-       }
        default:
                return -ENOIOCTLCMD;
        }
@@ -2033,15 +2018,6 @@ static bool mxser_port_isr(struct mxser_port *port)
 
        status = inb(port->ioaddr + UART_LSR);
 
-       if (status & UART_LSR_PE)
-               port->err_shadow |= NPPI_NOTIFY_PARITY;
-       if (status & UART_LSR_FE)
-               port->err_shadow |= NPPI_NOTIFY_FRAMING;
-       if (status & UART_LSR_OE)
-               port->err_shadow |= NPPI_NOTIFY_HW_OVERRUN;
-       if (status & UART_LSR_BI)
-               port->err_shadow |= NPPI_NOTIFY_BREAK;
-
        if (port->board->must_hwid) {
                if (iir == MOXA_MUST_IIR_GDA ||
                    iir == MOXA_MUST_IIR_RDA ||
@@ -2172,7 +2148,6 @@ static int mxser_initbrd(struct mxser_board *brd)
                info->port.close_delay = 5 * HZ / 10;
                info->port.closing_wait = 30 * HZ;
                info->normal_termios = mxvar_sdriver->init_termios;
-               info->err_shadow = 0;
                spin_lock_init(&info->slock);
 
                /* before set INT ISR, disable all int */