pcmcia: use dynamic debug infrastructure, deprecate CS_CHECK (char)

Convert PCMCIA drivers to use the dynamic debug infrastructure, instead of
requiring manual settings of PCMCIA_DEBUG. Only some rare extra debug checks
in cm4000_cs.c cm4040_cs.c are now hidden behind a "#ifdef CM4000_DEBUG"
or "#ifdef CM4040_DEBUG".

Also, remove all usages of the CS_CHECK macro and replace them with proper
Linux style calling and return value checking. The extra error reporting may
be dropped, as the PCMCIA core already complains about any (non-driver-author)
errors.

CC: Harald Welte <laforge@gnumonks.org>
CC: Jiri Kosina <jkosina@suse.cz>
CC: David Sterba <dsterba@suse.cz>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>

1 files changed, 27 insertions, 44 deletions

diff --git a/drivers/char/pcmcia/cm4000_cs.c b/drivers/char/pcmcia/cm4000_cs.c
index c250a31efa53..1611c4fe97fc 100644
--- a/drivers/char/pcmcia/cm4000_cs.c
+++ b/drivers/char/pcmcia/cm4000_cs.c
@@ -23,8 +23,6 @@
   * All rights reserved. Licensed under dual BSD/GPL license.
   */
 
-/* #define PCMCIA_DEBUG 6 */
-
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/slab.h>
@@ -47,18 +45,17 @@
 
 /* #define ATR_CSUM */
 
-#ifdef PCMCIA_DEBUG
 #define reader_to_dev(x)        (&handle_to_dev(x->p_dev))
-static int pc_debug = PCMCIA_DEBUG;
-module_param(pc_debug, int, 0600);
-#define DEBUGP(n, rdr, x, args...) do {                                 \
-        if (pc_debug >= (n))                                            \
-                dev_printk(KERN_DEBUG, reader_to_dev(rdr), "%s:" x,     \
-                           __func__ , ## args);                 \
+
+/* n (debug level) is ignored */
+/* additional debug output may be enabled by re-compiling with
+ * CM4000_DEBUG set */
+/* #define CM4000_DEBUG */
+#define DEBUGP(n, rdr, x, args...) do {                 \
+                dev_dbg(reader_to_dev(rdr), "%s:" x,    \
+                           __func__ , ## args);         \
         } while (0)
-#else
-#define DEBUGP(n, rdr, x, args...)
-#endif
+
 static char *version = "cm4000_cs.c v2.4.0gm6 - All bugs added by Harald Welte";
 
 #define T_1SEC          (HZ)
@@ -174,14 +171,13 @@ static unsigned char fi_di_table[10][14] = {
 /* 9 */ {0x09,0x19,0x29,0x39,0x49,0x59,0x69,0x11,0x11,0x99,0xA9,0xB9,0xC9,0xD9}
 };
 
-#ifndef PCMCIA_DEBUG
+#ifndef CM4000_DEBUG
 #define xoutb   outb
 #define xinb    inb
 #else
 static inline void xoutb(unsigned char val, unsigned short port)
 {
-        if (pc_debug >= 7)
-                printk(KERN_DEBUG "outb(val=%.2x,port=%.4x)\n", val, port);
+        pr_debug("outb(val=%.2x,port=%.4x)\n", val, port);
         outb(val, port);
 }
 static inline unsigned char xinb(unsigned short port)
@@ -189,8 +185,7 @@ static inline unsigned char xinb(unsigned short port)
         unsigned char val;
 
         val = inb(port);
-        if (pc_debug >= 7)
-                printk(KERN_DEBUG "%.2x=inb(%.4x)\n", val, port);
+        pr_debug("%.2x=inb(%.4x)\n", val, port);
 
         return val;
 }
@@ -514,12 +509,10 @@ static int set_protocol(struct cm4000_dev *dev, struct ptsreq *ptsreq)
         for (i = 0; i < 4; i++) {
                 xoutb(i, REG_BUF_ADDR(iobase));
                 xoutb(dev->pts[i], REG_BUF_DATA(iobase));       /* buf data */
-#ifdef PCMCIA_DEBUG
-                if (pc_debug >= 5)
-                        printk("0x%.2x ", dev->pts[i]);
+#ifdef CM4000_DEBUG
+                pr_debug("0x%.2x ", dev->pts[i]);
         }
-        if (pc_debug >= 5)
-                printk("\n");
+        pr_debug("\n");
 #else
         }
 #endif
@@ -579,14 +572,13 @@ static int set_protocol(struct cm4000_dev *dev, struct ptsreq *ptsreq)
                 pts_reply[i] = inb(REG_BUF_DATA(iobase));
         }
 
-#ifdef PCMCIA_DEBUG
+#ifdef CM4000_DEBUG
         DEBUGP(2, dev, "PTSreply: ");
         for (i = 0; i < num_bytes_read; i++) {
-                if (pc_debug >= 5)
-                        printk("0x%.2x ", pts_reply[i]);
+                pr_debug("0x%.2x ", pts_reply[i]);
         }
-        printk("\n");
-#endif  /* PCMCIA_DEBUG */
+        pr_debug("\n");
+#endif  /* CM4000_DEBUG */
 
         DEBUGP(5, dev, "Clear Tactive in Flags1\n");
         xoutb(0x20, REG_FLAGS1(iobase));
@@ -655,7 +647,7 @@ static void terminate_monitor(struct cm4000_dev *dev)
 
         DEBUGP(5, dev, "Delete timer\n");
         del_timer_sync(&dev->timer);
-#ifdef PCMCIA_DEBUG
+#ifdef CM4000_DEBUG
         dev->monitor_running = 0;
 #endif
 
@@ -898,7 +890,7 @@ static void monitor_card(unsigned long p)
                                 DEBUGP(4, dev, "ATR checksum (0x%.2x, should "
                                        "be zero) failed\n", dev->atr_csum);
                         }
-#ifdef PCMCIA_DEBUG
+#ifdef CM4000_DEBUG
                         else if (test_bit(IS_BAD_LENGTH, &dev->flags)) {
                                 DEBUGP(4, dev, "ATR length error\n");
                         } else {
@@ -1415,7 +1407,7 @@ static long cmm_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
         int size;
         int rc;
         void __user *argp = (void __user *)arg;
-#ifdef PCMCIA_DEBUG
+#ifdef CM4000_DEBUG
         char *ioctl_names[CM_IOC_MAXNR + 1] = {
                 [_IOC_NR(CM_IOCGSTATUS)] "CM_IOCGSTATUS",
                 [_IOC_NR(CM_IOCGATR)] "CM_IOCGATR",
@@ -1423,9 +1415,9 @@ static long cmm_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
                 [_IOC_NR(CM_IOCSPTS)] "CM_IOCSPTS",
                 [_IOC_NR(CM_IOSDBGLVL)] "CM4000_DBGLVL",
         };
-#endif
         DEBUGP(3, dev, "cmm_ioctl(device=%d.%d) %s\n", imajor(inode),
                iminor(inode), ioctl_names[_IOC_NR(cmd)]);
+#endif
 
         lock_kernel();
         rc = -ENODEV;
@@ -1523,7 +1515,7 @@ static long cmm_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
                 }
         case CM_IOCARDOFF:
 
-#ifdef PCMCIA_DEBUG
+#ifdef CM4000_DEBUG
                 DEBUGP(4, dev, "... in CM_IOCARDOFF\n");
                 if (dev->flags0 & 0x01) {
                         DEBUGP(4, dev, "    Card inserted\n");
@@ -1625,18 +1617,9 @@ static long cmm_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 
                 }
                 break;
-#ifdef PCMCIA_DEBUG
-        case CM_IOSDBGLVL:      /* set debug log level */
-                {
-                        int old_pc_debug = 0;
-
-                        old_pc_debug = pc_debug;
-                        if (copy_from_user(&pc_debug, argp, sizeof(int)))
-                                rc = -EFAULT;
-                        else if (old_pc_debug != pc_debug)
-                                DEBUGP(0, dev, "Changed debug log level "
-                                       "to %i\n", pc_debug);
-                }
+#ifdef CM4000_DEBUG
+        case CM_IOSDBGLVL:
+                rc = -ENOTTY;
                 break;
 #endif
         default: