Char: cyclades, dynamic ports

and save thus approx. 160k of .bss

Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2 files changed, 70 insertions, 73 deletions

diff --git a/drivers/char/cyclades.c b/drivers/char/cyclades.c
index c6a12bad70f5..7fe4bb60f690 100644
--- a/drivers/char/cyclades.c
+++ b/drivers/char/cyclades.c
@@ -722,11 +722,6 @@ module_param_array(irq, int, NULL, 0);
 */
 static struct cyclades_card cy_card[NR_CARDS];
 
-/* This is the per-channel data structure containing pointers, flags
- and variables for the port. This driver supports a maximum of NR_PORTS.
-*/
-static struct cyclades_port cy_port[NR_PORTS];
-
 static int cy_next_channel;     /* next minor available */
 
 /*
@@ -855,13 +850,6 @@ static inline int serial_paranoia_check(struct cyclades_port *info,
                 return 1;
         }
 
-        if ((long)info < (long)(&cy_port[0]) ||
-                        (long)(&cy_port[NR_PORTS]) < (long)info) {
-                printk(KERN_WARNING "cyc Warning: cyclades_port out of range "
-                                "for (%s) in %s\n", name, routine);
-                return 1;
-        }
-
         if (info->magic != CYCLADES_MAGIC) {
                 printk(KERN_WARNING "cyc Warning: bad magic number for serial "
                                 "struct (%s) in %s\n", name, routine);
@@ -1025,7 +1013,7 @@ static void cyy_intr_chip(struct cyclades_card *cinfo, int chip,
         struct cyclades_port *info;
         struct tty_struct *tty;
         int char_count;
-        int i, j, len, mdm_change, mdm_status, outch;
+        int j, len, mdm_change, mdm_status, outch;
         int save_xir, channel, save_car;
         char data;
 
@@ -1037,8 +1025,7 @@ static void cyy_intr_chip(struct cyclades_card *cinfo, int chip,
                 spin_lock(&cinfo->card_lock);
                 save_xir = (u_char) readb(base_addr + (CyRIR << index));
                 channel = (u_short) (save_xir & CyIRChannel);
-                i = channel + chip * 4 + cinfo->first_line;
-                info = &cy_port[i];
+                info = &cinfo->ports[channel + chip * 4];
                 save_car = readb(base_addr + (CyCAR << index));
                 cy_writeb(base_addr + (CyCAR << index), save_xir);
 
@@ -1202,18 +1189,17 @@ static void cyy_intr_chip(struct cyclades_card *cinfo, int chip,
                 spin_lock(&cinfo->card_lock);
                 save_xir = (u_char) readb(base_addr + (CyTIR << index));
                 channel = (u_short) (save_xir & CyIRChannel);
-                i = channel + chip * 4 + cinfo->first_line;
                 save_car = readb(base_addr + (CyCAR << index));
                 cy_writeb(base_addr + (CyCAR << index), save_xir);
 
                 /* validate the port# (as configured and open) */
-                if ((i < 0) || (NR_PORTS <= i)) {
+                if (channel + chip * 4 >= cinfo->nports) {
                         cy_writeb(base_addr + (CySRER << index),
                                   readb(base_addr + (CySRER << index)) &
                                   ~CyTxRdy);
                         goto txend;
                 }
-                info = &cy_port[i];
+                info = &cinfo->ports[channel + chip * 4];
                 if (info->tty == NULL) {
                         cy_writeb(base_addr + (CySRER << index),
                                   readb(base_addr + (CySRER << index)) &
@@ -1325,7 +1311,7 @@ txend:
                 spin_lock(&cinfo->card_lock);
                 save_xir = (u_char) readb(base_addr + (CyMIR << index));
                 channel = (u_short) (save_xir & CyIRChannel);
-                info = &cy_port[channel + chip * 4 + cinfo->first_line];
+                info = &cinfo->ports[channel + chip * 4];
                 save_car = readb(base_addr + (CyCAR << index));
                 cy_writeb(base_addr + (CyCAR << index), save_xir);
 
@@ -1726,7 +1712,7 @@ static void cyz_handle_cmd(struct cyclades_card *cinfo)
         while (cyz_fetch_msg(cinfo, &channel, &cmd, &param) == 1) {
                 special_count = 0;
                 delta_count = 0;
-                info = &cy_port[channel + cinfo->first_line];
+                info = &cinfo->ports[channel];
                 if ((tty = info->tty) == NULL)
                         continue;
 
@@ -1896,7 +1882,7 @@ static void cyz_poll(unsigned long arg)
                 cyz_handle_cmd(cinfo);
 
                 for (port = 0; port < cinfo->nports; port++) {
-                        info = &cy_port[port + cinfo->first_line];
+                        info = &cinfo->ports[port];
                         tty = info->tty;
                         ch_ctrl = &(zfw_ctrl->ch_ctrl[port]);
                         buf_ctrl = &(zfw_ctrl->buf_ctrl[port]);
@@ -2468,13 +2454,20 @@ block_til_ready(struct tty_struct *tty, struct file *filp,
 static int cy_open(struct tty_struct *tty, struct file *filp)
 {
         struct cyclades_port *info;
+        unsigned int i;
         int retval, line;
 
         line = tty->index;
         if ((line < 0) || (NR_PORTS <= line)) {
                 return -ENODEV;
         }
-        info = &cy_port[line];
+        for (i = 0; i < NR_CARDS; i++)
+                if (line < cy_card[i].first_line + cy_card[i].nports &&
+                                line >= cy_card[i].first_line)
+                        break;
+        if (i >= NR_CARDS)
+                return -ENODEV;
+        info = &cy_card[i].ports[line - cy_card[i].first_line];
         if (info->line < 0) {
                 return -ENODEV;
         }
@@ -4437,7 +4430,7 @@ static void cy_hangup(struct tty_struct *tty)
  * ---------------------------------------------------------------------
  */
 
-static void __devinit cy_init_card(struct cyclades_card *cinfo)
+static int __devinit cy_init_card(struct cyclades_card *cinfo)
 {
         struct cyclades_port *info;
         u32 mailbox;
@@ -4459,10 +4452,15 @@ static void __devinit cy_init_card(struct cyclades_card *cinfo)
                 nports = cinfo->nports = CyPORTS_PER_CHIP * cinfo->num_chips;
         }
 
+        cinfo->ports = kzalloc(sizeof(*cinfo->ports) * nports, GFP_KERNEL);
+        if (cinfo->ports == NULL) {
+                printk(KERN_ERR "Cyclades: cannot allocate ports\n");
+                return -ENOMEM;
+        }
+
         for (port = cinfo->first_line; port < cinfo->first_line + nports;
                         port++) {
-                info = &cy_port[port];
-                memset(info, 0, sizeof(*info));
+                info = &cinfo->ports[port - cinfo->first_line];
                 info->magic = CYCLADES_MAGIC;
                 info->card = cinfo;
                 info->line = port;
@@ -4525,6 +4523,7 @@ static void __devinit cy_init_card(struct cyclades_card *cinfo)
 #endif
         }
 #endif
+        return 0;
 }
 
 /* initialize chips on Cyclom-Y card -- return number of valid
@@ -5094,13 +5093,11 @@ static void __devexit cy_pci_remove(struct pci_dev *pdev)
         pci_release_regions(pdev);
 
         cinfo->base_addr = NULL;
-        for (i = cinfo->first_line; i < cinfo->first_line + cinfo->nports; i++){
-                cy_port[i].line = -1;
-                cy_port[i].magic = -1;
-        }
         for (i = cinfo->first_line; i < cinfo->first_line +
                         cinfo->nports; i++)
                 tty_unregister_device(cy_serial_driver, i);
+        cinfo->nports = 0;
+        kfree(cinfo->ports);
 }
 
 static struct pci_driver cy_pci_driver = {
@@ -5116,7 +5113,7 @@ cyclades_get_proc_info(char *buf, char **start, off_t offset, int length,
                 int *eof, void *data)
 {
         struct cyclades_port *info;
-        int i;
+        unsigned int i, j;
         int len = 0;
         off_t begin = 0;
         off_t pos = 0;
@@ -5130,33 +5127,34 @@ cyclades_get_proc_info(char *buf, char **start, off_t offset, int length,
         len += size;
 
         /* Output one line for each known port */
-        for (i = 0; i < NR_PORTS && cy_port[i].line >= 0; i++) {
-                info = &cy_port[i];
-
-                if (info->count)
-                        size = sprintf(buf + len, "%3d %8lu %10lu %8lu %10lu "
-                                "%8lu %9lu %6ld\n", info->line,
-                                (cur_jifs - info->idle_stats.in_use) / HZ,
-                                info->idle_stats.xmit_bytes,
-                                (cur_jifs - info->idle_stats.xmit_idle) / HZ,
-                                info->idle_stats.recv_bytes,
-                                (cur_jifs - info->idle_stats.recv_idle) / HZ,
-                                info->idle_stats.overruns,
-                                (long)info->tty->ldisc.num);
-                else
-                        size = sprintf(buf + len, "%3d %8lu %10lu %8lu %10lu "
-                                "%8lu %9lu %6ld\n",
-                                info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
-                len += size;
-                pos = begin + len;
-
-                if (pos < offset) {
-                        len = 0;
-                        begin = pos;
+        for (i = 0; i < NR_CARDS; i++)
+                for (j = 0; j < cy_card[i].nports; j++) {
+                        info = &cy_card[i].ports[j];
+
+                        if (info->count)
+                                size = sprintf(buf + len, "%3d %8lu %10lu %8lu "
+                                        "%10lu %8lu %9lu %6ld\n", info->line,
+                                        (cur_jifs - info->idle_stats.in_use) /
+                                        HZ, info->idle_stats.xmit_bytes,
+                                        (cur_jifs - info->idle_stats.xmit_idle)/
+                                        HZ, info->idle_stats.recv_bytes,
+                                        (cur_jifs - info->idle_stats.recv_idle)/
+                                        HZ, info->idle_stats.overruns,
+                                        (long)info->tty->ldisc.num);
+                        else
+                                size = sprintf(buf + len, "%3d %8lu %10lu %8lu "
+                                        "%10lu %8lu %9lu %6ld\n",
+                                        info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
+                        len += size;
+                        pos = begin + len;
+
+                        if (pos < offset) {
+                                len = 0;
+                                begin = pos;
+                        }
+                        if (pos > offset + length)
+                                goto done;
                 }
-                if (pos > offset + length)
-                        goto done;
-        }
         *eof = 1;
 done:
         *start = buf + (offset - begin);        /* Start of wanted data */
@@ -5211,7 +5209,7 @@ static const struct tty_operations cy_ops = {
 
 static int __init cy_init(void)
 {
-        unsigned int i, nboards;
+        unsigned int nboards;
         int retval = -ENOMEM;
 
         cy_serial_driver = alloc_tty_driver(NR_PORTS);
@@ -5242,11 +5240,6 @@ static int __init cy_init(void)
                 goto err_frtty;
         }
 
-        for (i = 0; i < NR_PORTS; i++) {
-                cy_port[i].line = -1;
-                cy_port[i].magic = -1;
-        }
-
         /* the code below is responsible to find the boards. Each different
            type of board has its own detection routine. If a board is found,
            the next cy_card structure available is set by the detection
@@ -5275,6 +5268,7 @@ err:
 
 static void __exit cy_cleanup_module(void)
 {
+        struct cyclades_card *card;
         int i, e1;
 
 #ifndef CONFIG_CYZ_INTR
@@ -5290,22 +5284,24 @@ static void __exit cy_cleanup_module(void)
 #endif
 
         for (i = 0; i < NR_CARDS; i++) {
-                if (cy_card[i].base_addr) {
+                card = &cy_card[i];
+                if (card->base_addr) {
                         /* clear interrupt */
-                        cy_writeb(cy_card[i].base_addr + Cy_ClrIntr, 0);
-                        iounmap(cy_card[i].base_addr);
-                        if (cy_card[i].ctl_addr)
-                                iounmap(cy_card[i].ctl_addr);
-                        if (cy_card[i].irq
+                        cy_writeb(card->base_addr + Cy_ClrIntr, 0);
+                        iounmap(card->base_addr);
+                        if (card->ctl_addr)
+                                iounmap(card->ctl_addr);
+                        if (card->irq
 #ifndef CONFIG_CYZ_INTR
-                                && !IS_CYC_Z(cy_card[i])
+                                && !IS_CYC_Z(*card)
 #endif /* CONFIG_CYZ_INTR */
                                 )
-                                free_irq(cy_card[i].irq, &cy_card[i]);
-                        for (e1 = cy_card[i].first_line;
-                                        e1 < cy_card[i].first_line +
-                                        cy_card[i].nports; e1++)
+                                free_irq(card->irq, card);
+                        for (e1 = card->first_line;
+                                        e1 < card->first_line +
+                                        card->nports; e1++)
                                 tty_unregister_device(cy_serial_driver, e1);
+                        kfree(card->ports);
                 }
         }
 
diff --git a/include/linux/cyclades.h b/include/linux/cyclades.h
index 07791f026766..72aa00cc4b2d 100644
--- a/include/linux/cyclades.h
+++ b/include/linux/cyclades.h
@@ -518,6 +518,7 @@ struct cyclades_card {
     int bus_index;      /* address shift - 0 for ISA, 1 for PCI */
     int intr_enabled;   /* FW Interrupt flag - 0 disabled, 1 enabled */
     spinlock_t card_lock;
+    struct cyclades_port *ports;
 };
 
 /***************************************