Merge branch 'bugzilla-11715' into test

[sfrench/cifs-2.6.git] / drivers / char / moxa.c

diff --git a/drivers/char/moxa.c b/drivers/char/moxa.c
index d3d7864e0c1ef566b86d9a5cfb72c45d2aaf5836..12d327a2c9ba72cadd471670f6300cca3e9a1ad0 100644 (file)
--- a/drivers/char/moxa.c
+++ b/drivers/char/moxa.c
@@ -205,7 +205,7 @@ static int moxa_tiocmset(struct tty_struct *tty, struct file *file,
 static void moxa_poll(unsigned long);
 static void moxa_set_tty_param(struct tty_struct *, struct ktermios *);
 static void moxa_setup_empty_event(struct tty_struct *);
-static void moxa_shut_down(struct moxa_port *);
+static void moxa_shut_down(struct tty_struct *);
 /*
  * moxa board interface functions:
  */
@@ -217,7 +217,7 @@ static void MoxaPortLineCtrl(struct moxa_port *, int, int);
 static void MoxaPortFlowCtrl(struct moxa_port *, int, int, int, int, int);
 static int MoxaPortLineStatus(struct moxa_port *);
 static void MoxaPortFlushData(struct moxa_port *, int);
-static int MoxaPortWriteData(struct moxa_port *, const unsigned char *, int);
+static int MoxaPortWriteData(struct tty_struct *, const unsigned char *, int);
 static int MoxaPortReadData(struct moxa_port *);
 static int MoxaPortTxQueue(struct moxa_port *);
 static int MoxaPortRxQueue(struct moxa_port *);
@@ -332,6 +332,7 @@ static int moxa_ioctl(struct tty_struct *tty, struct file *file,
                for (i = 0; i < MAX_BOARDS; i++) {
                        p = moxa_boards[i].ports;
                        for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) {
+                               struct tty_struct *ttyp;
                                memset(&tmp, 0, sizeof(tmp));
                                if (!moxa_boards[i].ready)
                                        goto copy;
@@ -344,10 +345,12 @@ static int moxa_ioctl(struct tty_struct *tty, struct file *file,
                                if (status & 4)
                                        tmp.dcd = 1;
 
-                               if (!p->port.tty || !p->port.tty->termios)
+                               ttyp = tty_port_tty_get(&p->port);
+                               if (!ttyp || !ttyp->termios)
                                        tmp.cflag = p->cflag;
                                else
-                                       tmp.cflag = p->port.tty->termios->c_cflag;
+                                       tmp.cflag = ttyp->termios->c_cflag;
+                               tty_kref_put(tty);
 copy:
                                if (copy_to_user(argm, &tmp, sizeof(tmp))) {
                                        mutex_unlock(&moxa_openlock);
@@ -510,7 +513,7 @@ static int moxa_real_load_code(struct moxa_board_conf *brd, const void *ptr,
                size_t len)
 {
        void __iomem *baseAddr = brd->basemem;
-       const u16 *uptr = ptr;
+       const __le16 *uptr = ptr;
        size_t wlen, len2, j;
        unsigned long key, loadbuf, loadlen, checksum, checksum_ok;
        unsigned int i, retry;
@@ -880,8 +883,14 @@ static void moxa_board_deinit(struct moxa_board_conf *brd)
 
        /* pci hot-un-plug support */
        for (a = 0; a < brd->numPorts; a++)
-               if (brd->ports[a].port.flags & ASYNC_INITIALIZED)
-                       tty_hangup(brd->ports[a].port.tty);
+               if (brd->ports[a].port.flags & ASYNC_INITIALIZED) {
+                       struct tty_struct *tty = tty_port_tty_get(
+                                               &brd->ports[a].port);
+                       if (tty) {
+                               tty_hangup(tty);
+                               tty_kref_put(tty);
+                       }
+               }
        while (1) {
                opened = 0;
                for (a = 0; a < brd->numPorts; a++)
@@ -1096,13 +1105,14 @@ static void __exit moxa_exit(void)
 module_init(moxa_init);
 module_exit(moxa_exit);
 
-static void moxa_close_port(struct moxa_port *ch)
+static void moxa_close_port(struct tty_struct *tty)
 {
-       moxa_shut_down(ch);
+       struct moxa_port *ch = tty->driver_data;
+       moxa_shut_down(tty);
        MoxaPortFlushData(ch, 2);
        ch->port.flags &= ~ASYNC_NORMAL_ACTIVE;
-       ch->port.tty->driver_data = NULL;
-       ch->port.tty = NULL;
+       tty->driver_data = NULL;
+       tty_port_tty_set(&ch->port, NULL);
 }
 
 static int moxa_block_till_ready(struct tty_struct *tty, struct file *filp,
@@ -1161,7 +1171,7 @@ static int moxa_open(struct tty_struct *tty, struct file *filp)
        ch = &brd->ports[port % MAX_PORTS_PER_BOARD];
        ch->port.count++;
        tty->driver_data = ch;
-       ch->port.tty = tty;
+       tty_port_tty_set(&ch->port, tty);
        if (!(ch->port.flags & ASYNC_INITIALIZED)) {
                ch->statusflags = 0;
                moxa_set_tty_param(tty, tty->termios);
@@ -1179,7 +1189,7 @@ static int moxa_open(struct tty_struct *tty, struct file *filp)
        if (retval) {
                if (ch->port.count) /* 0 means already hung up... */
                        if (--ch->port.count == 0)
-                               moxa_close_port(ch);
+                               moxa_close_port(tty);
        } else
                ch->port.flags |= ASYNC_NORMAL_ACTIVE;
        mutex_unlock(&moxa_openlock);
@@ -1219,7 +1229,7 @@ static void moxa_close(struct tty_struct *tty, struct file *filp)
                tty_wait_until_sent(tty, 30 * HZ);      /* 30 seconds timeout */
        }
 
-       moxa_close_port(ch);
+       moxa_close_port(tty);
 unlock:
        mutex_unlock(&moxa_openlock);
 }
@@ -1234,7 +1244,7 @@ static int moxa_write(struct tty_struct *tty,
                return 0;
 
        spin_lock_bh(&moxa_lock);
-       len = MoxaPortWriteData(ch, buf, count);
+       len = MoxaPortWriteData(tty, buf, count);
        spin_unlock_bh(&moxa_lock);
 
        ch->statusflags |= LOWWAIT;
@@ -1409,7 +1419,7 @@ static void moxa_hangup(struct tty_struct *tty)
                return;
        }
        ch->port.count = 0;
-       moxa_close_port(ch);
+       moxa_close_port(tty);
        mutex_unlock(&moxa_openlock);
 
        wake_up_interruptible(&ch->port.open_wait);
@@ -1417,11 +1427,14 @@ static void moxa_hangup(struct tty_struct *tty)
 
 static void moxa_new_dcdstate(struct moxa_port *p, u8 dcd)
 {
+       struct tty_struct *tty;
        dcd = !!dcd;
 
-       if (dcd != p->DCDState && p->port.tty && C_CLOCAL(p->port.tty)) {
-               if (!dcd)
-                       tty_hangup(p->port.tty);
+       if (dcd != p->DCDState) {
+               tty = tty_port_tty_get(&p->port);
+               if (tty && C_CLOCAL(tty) && !dcd)
+                       tty_hangup(tty);
+               tty_kref_put(tty);
        }
        p->DCDState = dcd;
 }
@@ -1429,7 +1442,7 @@ static void moxa_new_dcdstate(struct moxa_port *p, u8 dcd)
 static int moxa_poll_port(struct moxa_port *p, unsigned int handle,
                u16 __iomem *ip)
 {
-       struct tty_struct *tty = p->port.tty;
+       struct tty_struct *tty = tty_port_tty_get(&p->port);
        void __iomem *ofsAddr;
        unsigned int inited = p->port.flags & ASYNC_INITIALIZED;
        u16 intr;
@@ -1476,6 +1489,7 @@ static int moxa_poll_port(struct moxa_port *p, unsigned int handle,
                tty_insert_flip_char(tty, 0, TTY_BREAK);
                tty_schedule_flip(tty);
        }
+       tty_kref_put(tty);
 
        if (intr & IntrLine)
                moxa_new_dcdstate(p, readb(ofsAddr + FlagStat) & DCD_state);
@@ -1560,9 +1574,9 @@ static void moxa_setup_empty_event(struct tty_struct *tty)
        spin_unlock_bh(&moxa_lock);
 }
 
-static void moxa_shut_down(struct moxa_port *ch)
+static void moxa_shut_down(struct tty_struct *tty)
 {
-       struct tty_struct *tp = ch->port.tty;
+       struct moxa_port *ch = tty->driver_data;
 
        if (!(ch->port.flags & ASYNC_INITIALIZED))
                return;
@@ -1572,7 +1586,7 @@ static void moxa_shut_down(struct moxa_port *ch)
        /*
         * If we're a modem control device and HUPCL is on, drop RTS & DTR.
         */
-       if (C_HUPCL(tp))
+       if (C_HUPCL(tty))
                MoxaPortLineCtrl(ch, 0, 0);
 
        spin_lock_bh(&moxa_lock);
@@ -1953,9 +1967,10 @@ static int MoxaPortLineStatus(struct moxa_port *port)
        return val;
 }
 
-static int MoxaPortWriteData(struct moxa_port *port,
+static int MoxaPortWriteData(struct tty_struct *tty,
                const unsigned char *buffer, int len)
 {
+       struct moxa_port *port = tty->driver_data;
        void __iomem *baseAddr, *ofsAddr, *ofs;
        unsigned int c, total;
        u16 head, tail, tx_mask, spage, epage;