strip: Fix up strip for the new order

- Use the tty baud functions
- Call driver termios methods directly holding the right locking
- Check for a write method

Signed-off-by: Alan Cox <alan@redhat.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Jeff Garzik <jeff@garzik.org>
Cc: "John W. Linville" <linville@tuxdriver.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 24 insertions, 42 deletions

diff --git a/drivers/net/wireless/strip.c b/drivers/net/wireless/strip.c
index bced3fe1cf8a..5dd23c93497d 100644
--- a/drivers/net/wireless/strip.c
+++ b/drivers/net/wireless/strip.c
@@ -768,41 +768,17 @@ static __u8 *UnStuffData(__u8 * src, __u8 * end, __u8 * dst,
 /* General routines for STRIP                                           */
 
 /*
- * get_baud returns the current baud rate, as one of the constants defined in
- * termbits.h
- * If the user has issued a baud rate override using the 'setserial' command
- * and the logical current rate is set to 38.4, then the true baud rate
- * currently in effect (57.6 or 115.2) is returned.
- */
-static unsigned int get_baud(struct tty_struct *tty)
-{
-        if (!tty || !tty->termios)
-                return (0);
-        if ((tty->termios->c_cflag & CBAUD) == B38400 && tty->driver_data) {
-                struct async_struct *info =
-                    (struct async_struct *) tty->driver_data;
-                if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
-                        return (B57600);
-                if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
-                        return (B115200);
-        }
-        return (tty->termios->c_cflag & CBAUD);
-}
-
-/*
  * set_baud sets the baud rate to the rate defined by baudcode
- * Note: The rate B38400 should be avoided, because the user may have
- * issued a 'setserial' speed override to map that to a different speed.
- * We could achieve a true rate of 38400 if we needed to by cancelling
- * any user speed override that is in place, but that might annoy the
- * user, so it is simplest to just avoid using 38400.
  */
-static void set_baud(struct tty_struct *tty, unsigned int baudcode)
+static void set_baud(struct tty_struct *tty, speed_t baudrate)
 {
-        struct ktermios old_termios = *(tty->termios);
-        tty->termios->c_cflag &= ~CBAUD;        /* Clear the old baud setting */
-        tty->termios->c_cflag |= baudcode;      /* Set the new baud setting */
-        tty->driver->set_termios(tty, &old_termios);
+        struct ktermios old_termios;
+
+        mutex_lock(&tty->termios_mutex);
+        old_termios =*(tty->termios);
+        tty_encode_baud_rate(tty, baudrate, baudrate);
+        tty->ops->set_termios(tty, &old_termios);
+        mutex_unlock(&tty->termios_mutex);
 }
 
 /*
@@ -1217,7 +1193,7 @@ static void ResetRadio(struct strip *strip_info)
         strip_info->watchdog_doreset = jiffies + 1 * HZ;
 
         /* If the user has selected a baud rate above 38.4 see what magic we have to do */
-        if (strip_info->user_baud > B38400) {
+        if (strip_info->user_baud > 38400) {
                 /*
                  * Subtle stuff: Pay attention :-)
                  * If the serial port is currently at the user's selected (>38.4) rate,
@@ -1227,17 +1203,17 @@ static void ResetRadio(struct strip *strip_info)
                  * issued the ATS304 command last time through, so this time we restore
                  * the user's selected rate and issue the normal starmode reset string.
                  */
-                if (strip_info->user_baud == get_baud(tty)) {
+                if (strip_info->user_baud == tty_get_baud_rate(tty)) {
                         static const char b0[] = "ate0q1s304=57600\r";
                         static const char b1[] = "ate0q1s304=115200\r";
                         static const StringDescriptor baudstring[2] =
                             { {b0, sizeof(b0) - 1}
                         , {b1, sizeof(b1) - 1}
                         };
-                        set_baud(tty, B19200);
-                        if (strip_info->user_baud == B57600)
+                        set_baud(tty, 19200);
+                        if (strip_info->user_baud == 57600)
                                 s = baudstring[0];
-                        else if (strip_info->user_baud == B115200)
+                        else if (strip_info->user_baud == 115200)
                                 s = baudstring[1];
                         else
                                 s = baudstring[1];      /* For now */
@@ -1245,7 +1221,7 @@ static void ResetRadio(struct strip *strip_info)
                         set_baud(tty, strip_info->user_baud);
         }
 
-        tty->driver->write(tty, s.string, s.length);
+        tty->ops->write(tty, s.string, s.length);
 #ifdef EXT_COUNTERS
         strip_info->tx_ebytes += s.length;
 #endif
@@ -1267,7 +1243,7 @@ static void strip_write_some_more(struct tty_struct *tty)
 
         if (strip_info->tx_left > 0) {
                 int num_written =
-                    tty->driver->write(tty, strip_info->tx_head,
+                    tty->ops->write(tty, strip_info->tx_head,
                                       strip_info->tx_left);
                 strip_info->tx_left -= num_written;
                 strip_info->tx_head += num_written;
@@ -2457,7 +2433,7 @@ static int strip_open_low(struct net_device *dev)
         strip_info->working = FALSE;
         strip_info->firmware_level = NoStructure;
         strip_info->next_command = CompatibilityCommand;
-        strip_info->user_baud = get_baud(strip_info->tty);
+        strip_info->user_baud = tty_get_baud_rate(strip_info->tty);
 
         printk(KERN_INFO "%s: Initializing Radio.\n",
                strip_info->dev->name);
@@ -2632,6 +2608,13 @@ static int strip_open(struct tty_struct *tty)
                 return -EEXIST;
 
         /*
+         * We need a write method.
+         */
+
+        if (tty->ops->write == NULL)
+                return -EOPNOTSUPP;
+
+        /*
          * OK.  Find a free STRIP channel to use.
          */
         if ((strip_info = strip_alloc()) == NULL)
@@ -2652,8 +2635,7 @@ static int strip_open(struct tty_struct *tty)
         tty->disc_data = strip_info;
         tty->receive_room = 65536;
 
-        if (tty->driver->flush_buffer)
-                tty->driver->flush_buffer(tty);
+        tty_driver_flush_buffer(tty);
 
         /*
          * Restore default settings