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Char: mxser, globals cleanup

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- remove unused mxvar_diagflag
- move mxser_msr into the only user/function
- GMStatus, hmm, fix race-prone access to it. We need only one instance for
  real, not MXSER_PORTS. Move it to MOXA_GETMSTATUS ioctl.
- mxser_mon_ext, almost the same, but alloc it on heap, since it has more than
  2 kilos.
- fix indexing, `i' is not the index value, `i * MXSER_PORTS_PER_BOARD + j' is

Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Acked-by: Alan Cox <alan@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Jiri Slaby 2008-07-25 01:48:20 -07:00 committed by Linus Torvalds
parent 41aee9a121
commit 72800df9ba
1 changed files with 55 additions and 75 deletions
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130
drivers/char/mxser.c
View file

@ -286,8 +286,6 @@ struct mxser_mstatus {
int dcd; int dcd;
}; };
static struct mxser_mstatus GMStatus[MXSER_PORTS];
static int mxserBoardCAP[MXSER_BOARDS] = { static int mxserBoardCAP[MXSER_BOARDS] = {
0, 0, 0, 0 0, 0, 0, 0
/* 0x180, 0x280, 0x200, 0x320 */ /* 0x180, 0x280, 0x200, 0x320 */
@ -296,9 +294,6 @@ static int mxserBoardCAP[MXSER_BOARDS] = {
static struct mxser_board mxser_boards[MXSER_BOARDS]; static struct mxser_board mxser_boards[MXSER_BOARDS];
static struct tty_driver *mxvar_sdriver; static struct tty_driver *mxvar_sdriver;
static struct mxser_log mxvar_log; static struct mxser_log mxvar_log;
static int mxvar_diagflag;
static unsigned char mxser_msr[MXSER_PORTS + 1];
static struct mxser_mon_ext mon_data_ext;
static int mxser_set_baud_method[MXSER_PORTS + 1]; static int mxser_set_baud_method[MXSER_PORTS + 1];
static void mxser_enable_must_enchance_mode(unsigned long baseio) static void mxser_enable_must_enchance_mode(unsigned long baseio)
@ -542,6 +537,7 @@ static void process_txrx_fifo(struct mxser_port *info)
static unsigned char mxser_get_msr(int baseaddr, int mode, int port) static unsigned char mxser_get_msr(int baseaddr, int mode, int port)
{ {
static unsigned char mxser_msr[MXSER_PORTS + 1];
unsigned char status = 0; unsigned char status = 0;
status = inb(baseaddr + UART_MSR); status = inb(baseaddr + UART_MSR);
@ -1652,62 +1648,60 @@ static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
ret = -EFAULT; ret = -EFAULT;
unlock_kernel(); unlock_kernel();
return ret; return ret;
case MOXA_GETMSTATUS: case MOXA_GETMSTATUS: {
struct mxser_mstatus ms, __user *msu = argp;
lock_kernel(); lock_kernel();
for (i = 0; i < MXSER_BOARDS; i++) for (i = 0; i < MXSER_BOARDS; i++)
for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) { for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
port = &mxser_boards[i].ports[j]; port = &mxser_boards[i].ports[j];
memset(&ms, 0, sizeof(ms));
GMStatus[i].ri = 0; if (!port->ioaddr)
if (!port->ioaddr) { goto copy;
GMStatus[i].dcd = 0;
GMStatus[i].dsr = 0;
GMStatus[i].cts = 0;
continue;
}
if (!port->port.tty || !port->port.tty->termios) if (!port->port.tty || !port->port.tty->termios)
GMStatus[i].cflag = ms.cflag = port->normal_termios.c_cflag;
port->normal_termios.c_cflag;
else else
GMStatus[i].cflag = ms.cflag = port->port.tty->termios->c_cflag;
port->port.tty->termios->c_cflag;
status = inb(port->ioaddr + UART_MSR); status = inb(port->ioaddr + UART_MSR);
if (status & 0x80 /*UART_MSR_DCD */ ) if (status & UART_MSR_DCD)
GMStatus[i].dcd = 1; ms.dcd = 1;
else if (status & UART_MSR_DSR)
GMStatus[i].dcd = 0; ms.dsr = 1;
if (status & UART_MSR_CTS)
if (status & 0x20 /*UART_MSR_DSR */ ) ms.cts = 1;
GMStatus[i].dsr = 1; copy:
else if (copy_to_user(msu, &ms, sizeof(ms))) {
GMStatus[i].dsr = 0; unlock_kernel();
return -EFAULT;
}
if (status & 0x10 /*UART_MSR_CTS */ ) msu++;
GMStatus[i].cts = 1;
else
GMStatus[i].cts = 0;
} }
unlock_kernel(); unlock_kernel();
if (copy_to_user(argp, GMStatus,
sizeof(struct mxser_mstatus) * MXSER_PORTS))
return -EFAULT;
return 0; return 0;
}
case MOXA_ASPP_MON_EXT: { case MOXA_ASPP_MON_EXT: {
int p, shiftbit; struct mxser_mon_ext *me; /* it's 2k, stack unfriendly */
unsigned long opmode; unsigned int cflag, iflag, p;
unsigned cflag, iflag; u8 opmode;
me = kzalloc(sizeof(*me), GFP_KERNEL);
if (!me)
return -ENOMEM;
lock_kernel(); lock_kernel();
for (i = 0; i < MXSER_BOARDS; i++) { for (i = 0, p = 0; i < MXSER_BOARDS; i++) {
for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) { for (j = 0; j < MXSER_PORTS_PER_BOARD; j++, p++) {
if (p >= ARRAY_SIZE(me->rx_cnt)) {
i = MXSER_BOARDS;
break;
}
port = &mxser_boards[i].ports[j]; port = &mxser_boards[i].ports[j];
if (!port->ioaddr) if (!port->ioaddr)
continue; continue;
status = mxser_get_msr(port->ioaddr, 0, i); status = mxser_get_msr(port->ioaddr, 0, p);
if (status & UART_MSR_TERI) if (status & UART_MSR_TERI)
port->icount.rng++; port->icount.rng++;
@ -1719,16 +1713,13 @@ static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
port->icount.cts++; port->icount.cts++;
port->mon_data.modem_status = status; port->mon_data.modem_status = status;
mon_data_ext.rx_cnt[i] = port->mon_data.rxcnt; me->rx_cnt[p] = port->mon_data.rxcnt;
mon_data_ext.tx_cnt[i] = port->mon_data.txcnt; me->tx_cnt[p] = port->mon_data.txcnt;
mon_data_ext.up_rxcnt[i] = me->up_rxcnt[p] = port->mon_data.up_rxcnt;
port->mon_data.up_rxcnt; me->up_txcnt[p] = port->mon_data.up_txcnt;
mon_data_ext.up_txcnt[i] = me->modem_status[p] =
port->mon_data.up_txcnt;
mon_data_ext.modem_status[i] =
port->mon_data.modem_status; port->mon_data.modem_status;
mon_data_ext.baudrate[i] = me->baudrate[p] = tty_get_baud_rate(port->port.tty);
tty_get_baud_rate(port->port.tty);
if (!port->port.tty || !port->port.tty->termios) { if (!port->port.tty || !port->port.tty->termios) {
cflag = port->normal_termios.c_cflag; cflag = port->normal_termios.c_cflag;
@ -1738,40 +1729,31 @@ static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
iflag = port->port.tty->termios->c_iflag; iflag = port->port.tty->termios->c_iflag;
} }
mon_data_ext.databits[i] = cflag & CSIZE; me->databits[p] = cflag & CSIZE;
me->stopbits[p] = cflag & CSTOPB;
mon_data_ext.stopbits[i] = cflag & CSTOPB; me->parity[p] = cflag & (PARENB | PARODD |
CMSPAR);
mon_data_ext.parity[i] =
cflag & (PARENB | PARODD | CMSPAR);
mon_data_ext.flowctrl[i] = 0x00;
if (cflag & CRTSCTS) if (cflag & CRTSCTS)
mon_data_ext.flowctrl[i] |= 0x03; me->flowctrl[p] |= 0x03;
if (iflag & (IXON | IXOFF)) if (iflag & (IXON | IXOFF))
mon_data_ext.flowctrl[i] |= 0x0C; me->flowctrl[p] |= 0x0C;
if (port->type == PORT_16550A) if (port->type == PORT_16550A)
mon_data_ext.fifo[i] = 1; me->fifo[p] = 1;
else
mon_data_ext.fifo[i] = 0;
p = i % 4; opmode = inb(port->opmode_ioaddr) >>
shiftbit = p * 2; ((p % 4) * 2);
opmode = inb(port->opmode_ioaddr) >> shiftbit;
opmode &= OP_MODE_MASK; opmode &= OP_MODE_MASK;
me->iftype[p] = opmode;
mon_data_ext.iftype[i] = opmode;
} }
} }
unlock_kernel(); unlock_kernel();
if (copy_to_user(argp, &mon_data_ext, if (copy_to_user(argp, me, sizeof(*me)))
sizeof(mon_data_ext))) ret = -EFAULT;
return -EFAULT; kfree(me);
return 0; return ret;
} }
default: default:
return -ENOIOCTLCMD; return -ENOIOCTLCMD;
@ -2802,8 +2784,6 @@ static int __init mxser_module_init(void)
goto err_put; goto err_put;
} }
mxvar_diagflag = 0;
m = 0; m = 0;
/* Start finding ISA boards here */ /* Start finding ISA boards here */
for (isaloop = 0; isaloop < 2; isaloop++) for (isaloop = 0; isaloop < 2; isaloop++)