[PATCH] char/isicom: Other little changes

Move some code from one place to another.  Get rid of ugly ifdefs in code in
next p[patches, so here create functions and macros to enable it.  Rename some
functions and align some code to 80 chars.

Signed-off-by: Jiri Slaby <xslaby@fi.muni.cz>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 81 insertions, 82 deletions

diff --git a/drivers/char/isicom.c b/drivers/char/isicom.c
index 9ede7c211cc1..49f88c9006cb 100644
--- a/drivers/char/isicom.c
+++ b/drivers/char/isicom.c
@@ -135,6 +135,17 @@
 
 #include <linux/isicom.h>
 
+#define InterruptTheCard(base) outw(0, (base) + 0xc)
+#define ClearInterrupt(base) inw((base) + 0x0a)
+
+#ifdef DEBUG
+#define pr_dbg(str...) printk(KERN_DEBUG "ISICOM: " str)
+#define isicom_paranoia_check(a, b, c) __isicom_paranoia_check((a), (b), (c))
+#else
+#define pr_dbg(str...) do { } while (0)
+#define isicom_paranoia_check(a, b, c) 0
+#endif
+
 static struct pci_device_id isicom_pci_tbl[] = {
         { VENDOR_ID, 0x2028, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
         { VENDOR_ID, 0x2051, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
@@ -161,7 +172,6 @@ static void isicom_tx(unsigned long _data);
 static void isicom_start(struct tty_struct *tty);
 
 static unsigned char *tmp_buf;
-static DECLARE_MUTEX(tmp_buf_sem);
 
 /*   baud index mappings from linux defns to isi */
 
@@ -599,23 +609,20 @@ static int ISILoad_ioctl(struct inode *inode, struct file *filp,
  *
  */
 
-static inline int isicom_paranoia_check(struct isi_port const *port, char *name,
-        const char *routine)
+static inline int __isicom_paranoia_check(struct isi_port const *port,
+        char *name, const char *routine)
 {
-#ifdef ISICOM_DEBUG
-        static const char *badmagic =
-                        KERN_WARNING "ISICOM: Warning: bad isicom magic for dev %s in %s.\n";
-        static const char *badport =
-                        KERN_WARNING "ISICOM: Warning: NULL isicom port for dev %s in %s.\n";
         if (!port) {
-                printk(badport, name, routine);
+                printk(KERN_WARNING "ISICOM: Warning: bad isicom magic for "
+                        "dev %s in %s.\n", name, routine);
                 return 1;
         }
         if (port->magic != ISICOM_MAGIC) {
-                printk(badmagic, name, routine);
+                printk(KERN_WARNING "ISICOM: Warning: NULL isicom port for "
+                        "dev %s in %s.\n", name, routine);
                 return 1;
         }
-#endif
+
         return 0;
 }
 
@@ -674,12 +681,10 @@ static void isicom_tx(unsigned long _data)
                         unlock_card(&isi_card[card]);
                         continue;
                 }
-#ifdef ISICOM_DEBUG
-                printk(KERN_DEBUG "ISICOM: txing %d bytes, port%d.\n",
-                                txcount, port->channel+1);
-#endif
-                outw((port->channel << isi_card[card].shift_count) | txcount
-                                        , base);
+                pr_dbg("txing %d bytes, port%d.\n", txcount,
+                        port->channel + 1);
+                outw((port->channel << isi_card[card].shift_count) | txcount,
+                        base);
                 residue = NO;
                 wrd = 0;
                 while (1) {
@@ -725,8 +730,11 @@ static void isicom_tx(unsigned long _data)
 
         /*      schedule another tx for hopefully in about 10ms */
 sched_again:
-        if (!re_schedule)
-                return;
+        if (!re_schedule) {
+                re_schedule = 2;
+                return;
+        }
+
         init_timer(&tx);
         tx.expires = jiffies + HZ/100;
         tx.data = 0;
@@ -830,9 +838,7 @@ static irqreturn_t isicom_interrupt(int irq, void *dev_id, struct pt_regs *regs)
                                 if (port->status & ISI_DCD) {
                                         if (!(header & ISI_DCD)) {
                                         /* Carrier has been lost  */
-#ifdef ISICOM_DEBUG
-                                                printk(KERN_DEBUG "ISICOM: interrupt: DCD->low.\n");
-#endif
+                                                pr_dbg("interrupt: DCD->low.\n");
                                                 port->status &= ~ISI_DCD;
                                                 schedule_work(&port->hangup_tq);
                                         }
@@ -840,9 +846,7 @@ static irqreturn_t isicom_interrupt(int irq, void *dev_id, struct pt_regs *regs)
                                 else {
                                         if (header & ISI_DCD) {
                                         /* Carrier has been detected */
-#ifdef ISICOM_DEBUG
-                                                printk(KERN_DEBUG "ISICOM: interrupt: DCD->high.\n");
-#endif
+                                                pr_dbg("interrupt: DCD->high.\n");
                                                 port->status |= ISI_DCD;
                                                 wake_up_interruptible(&port->open_wait);
                                         }
@@ -899,21 +903,18 @@ static irqreturn_t isicom_interrupt(int irq, void *dev_id, struct pt_regs *regs)
                         break;
 
                 case 2: /* Statistics            */
-                        printk(KERN_DEBUG "ISICOM: isicom_interrupt: stats!!!.\n");
+                        pr_dbg("isicom_interrupt: stats!!!.\n");
                         break;
 
                 default:
-                        printk(KERN_WARNING "ISICOM: Intr: Unknown code in status packet.\n");
+                        pr_dbg("Intr: Unknown code in status packet.\n");
                         break;
                 }
         }
         else {                          /* Data   Packet */
 
                 count = tty_prepare_flip_string(tty, &rp, byte_count & ~1);
-#ifdef ISICOM_DEBUG
-                printk(KERN_DEBUG "ISICOM: Intr: Can rx %d of %d bytes.\n",
-                                        count, byte_count);
-#endif
+                pr_dbg("Intr: Can rx %d of %d bytes.\n", count, byte_count);
                 word_count = count >> 1;
                 insw(base, rp, word_count);
                 byte_count -= (word_count << 1);
@@ -922,8 +923,8 @@ static irqreturn_t isicom_interrupt(int irq, void *dev_id, struct pt_regs *regs)
                         byte_count -= 2;
                 }
                 if (byte_count > 0) {
-                        printk(KERN_DEBUG "ISICOM: Intr(0x%lx:%d): Flip buffer overflow! dropping bytes...\n",
-                                        base, channel+1);
+                        pr_dbg("Intr(0x%lx:%d): Flip buffer overflow! dropping "
+                                "bytes...\n", base, channel + 1);
                         while(byte_count > 0) { /* drain out unread xtra data */
                                 inw(base);
                                 byte_count -= 2;
@@ -1116,9 +1117,7 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp, struct isi
         /* block if port is in the process of being closed */
 
         if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING) {
-#ifdef ISICOM_DEBUG
-                printk(KERN_DEBUG "ISICOM: block_til_ready: close in progress.\n");
-#endif
+                pr_dbg("block_til_ready: close in progress.\n");
                 interruptible_sleep_on(&port->close_wait);
                 if (port->flags & ASYNC_HUP_NOTIFY)
                         return -EAGAIN;
@@ -1129,9 +1128,7 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp, struct isi
         /* if non-blocking mode is set ... */
 
         if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) {
-#ifdef ISICOM_DEBUG
-                printk(KERN_DEBUG "ISICOM: block_til_ready: non-block mode.\n");
-#endif
+                pr_dbg("block_til_ready: non-block mode.\n");
                 port->flags |= ASYNC_NORMAL_ACTIVE;
                 return 0;
         }
@@ -1271,7 +1268,7 @@ static void isicom_shutdown_port(struct isi_port *port)
                 set_bit(TTY_IO_ERROR, &tty->flags);
 
         if (--card->count < 0) {
-                printk(KERN_DEBUG "ISICOM: isicom_shutdown_port: bad board(0x%lx) count %d.\n",
+                pr_dbg("isicom_shutdown_port: bad board(0x%lx) count %d.\n",
                         card->base, card->count);
                 card->count = 0;
         }
@@ -1294,9 +1291,7 @@ static void isicom_close(struct tty_struct *tty, struct file *filp)
         if (isicom_paranoia_check(port, tty->name, "isicom_close"))
                 return;
 
-#ifdef ISICOM_DEBUG
-        printk(KERN_DEBUG "ISICOM: Close start!!!.\n");
-#endif
+        pr_dbg("Close start!!!.\n");
 
         spin_lock_irqsave(&card->card_lock, flags);
         if (tty_hung_up_p(filp)) {
@@ -1347,9 +1342,7 @@ static void isicom_close(struct tty_struct *tty, struct file *filp)
         if (port->blocked_open) {
                 spin_unlock_irqrestore(&card->card_lock, flags);
                 if (port->close_delay) {
-#ifdef ISICOM_DEBUG
-                        printk(KERN_DEBUG "ISICOM: scheduling until time out.\n");
-#endif
+                        pr_dbg("scheduling until time out.\n");
                         msleep_interruptible(jiffies_to_msecs(port->close_delay));
                 }
                 spin_lock_irqsave(&card->card_lock, flags);
@@ -1786,42 +1779,44 @@ static struct tty_operations isicom_ops = {
         .tiocmset               = isicom_tiocmset,
 };
 
-static int __devinit register_drivers(void)
+static int __devinit isicom_register_tty_driver(void)
 {
-        int error;
+        int error = -ENOMEM;
 
         /* tty driver structure initialization */
         isicom_normal = alloc_tty_driver(PORT_COUNT);
         if (!isicom_normal)
-                return -ENOMEM;
-
-        isicom_normal->owner    = THIS_MODULE;
-        isicom_normal->name     = "ttyM";
-        isicom_normal->devfs_name = "isicom/";
-        isicom_normal->major    = ISICOM_NMAJOR;
-        isicom_normal->minor_start      = 0;
-        isicom_normal->type     = TTY_DRIVER_TYPE_SERIAL;
-        isicom_normal->subtype  = SERIAL_TYPE_NORMAL;
-        isicom_normal->init_termios     = tty_std_termios;
-        isicom_normal->init_termios.c_cflag     =
-                                B9600 | CS8 | CREAD | HUPCL |CLOCAL;
-        isicom_normal->flags    = TTY_DRIVER_REAL_RAW;
+                goto end;
+
+        isicom_normal->owner                    = THIS_MODULE;
+        isicom_normal->name                     = "ttyM";
+        isicom_normal->devfs_name               = "isicom/";
+        isicom_normal->major                    = ISICOM_NMAJOR;
+        isicom_normal->minor_start              = 0;
+        isicom_normal->type                     = TTY_DRIVER_TYPE_SERIAL;
+        isicom_normal->subtype                  = SERIAL_TYPE_NORMAL;
+        isicom_normal->init_termios             = tty_std_termios;
+        isicom_normal->init_termios.c_cflag     = B9600 | CS8 | CREAD | HUPCL |
+                CLOCAL;
+        isicom_normal->flags                    = TTY_DRIVER_REAL_RAW;
         tty_set_operations(isicom_normal, &isicom_ops);
 
-        if ((error=tty_register_driver(isicom_normal))!=0) {
-                printk(KERN_DEBUG "ISICOM: Couldn't register the dialin driver, error=%d\n",
+        if ((error = tty_register_driver(isicom_normal))) {
+                pr_dbg("Couldn't register the dialin driver, error=%d\n",
                         error);
                 put_tty_driver(isicom_normal);
-                return error;
         }
-        return 0;
+end:
+        return error;
 }
 
-static void unregister_drivers(void)
+static void isicom_unregister_tty_driver(void)
 {
-        int error = tty_unregister_driver(isicom_normal);
-        if (error)
-                printk(KERN_DEBUG "ISICOM: couldn't unregister normal driver error=%d.\n",error);
+        int error;
+
+        if ((error = tty_unregister_driver(isicom_normal)))
+                pr_dbg("couldn't unregister normal driver, error=%d.\n", error);
+
         put_tty_driver(isicom_normal);
 }
 
@@ -1891,7 +1886,7 @@ static int __devinit isicom_init(void)
                 free_page((unsigned long)tmp_buf);
                 return 0;
         }
-        if (register_drivers())
+        if (isicom_register_tty_driver())
         {
                 unregister_ioregion();
                 free_page((unsigned long)tmp_buf);
@@ -1899,7 +1894,7 @@ static int __devinit isicom_init(void)
         }
         if (!register_isr())
         {
-                unregister_drivers();
+                isicom_unregister_tty_driver();
                 /*  ioports already uregistered in register_isr */
                 free_page((unsigned long)tmp_buf);
                 return 0;
@@ -1936,14 +1931,6 @@ static int __devinit isicom_init(void)
 static int io[4];
 static int irq[4];
 
-MODULE_AUTHOR("MultiTech");
-MODULE_DESCRIPTION("Driver for the ISI series of cards by MultiTech");
-MODULE_LICENSE("GPL");
-module_param_array(io, int, NULL, 0);
-MODULE_PARM_DESC(io, "I/O ports for the cards");
-module_param_array(irq, int, NULL, 0);
-MODULE_PARM_DESC(irq, "Interrupts for the cards");
-
 static int __devinit isicom_setup(void)
 {
         struct pci_dev *dev = NULL;
@@ -2047,11 +2034,15 @@ static int __devinit isicom_setup(void)
 
 static void __exit isicom_exit(void)
 {
+        unsigned int index = 0;
+
         re_schedule = 0;
-        /* FIXME */
-        msleep(1000);
+
+        while (re_schedule != 2 && index++ < 100)
+                msleep(10);
+
         unregister_isr();
-        unregister_drivers();
+        isicom_unregister_tty_driver();
         unregister_ioregion();
         if (tmp_buf)
                 free_page((unsigned long)tmp_buf);
@@ -2061,3 +2052,11 @@ static void __exit isicom_exit(void)
 
 module_init(isicom_setup);
 module_exit(isicom_exit);
+
+MODULE_AUTHOR("MultiTech");
+MODULE_DESCRIPTION("Driver for the ISI series of cards by MultiTech");
+MODULE_LICENSE("GPL");
+module_param_array(io, int, NULL, 0);
+MODULE_PARM_DESC(io, "I/O ports for the cards");
+module_param_array(irq, int, NULL, 0);
+MODULE_PARM_DESC(irq, "Interrupts for the cards");