floppy: do a very minimal style cleanup of the floppy driver

Yes, some of this will likely be replaced in later patches, but I do not see
anyone else coming out of the woodwork with any patches for this driver, so
I'll ignore comments about churn.  I want to get this driver cleaned up, and
if I'm going to do so I want to start with this basic style cleanup to reduce
the reading pain a bit.

Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 73 insertions, 50 deletions

diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c
index 72803a3585ff..c6416f841131 100644
--- a/drivers/block/floppy.c
+++ b/drivers/block/floppy.c
@@ -5,6 +5,7 @@
  *  Copyright (C) 1993, 1994  Alain Knaff
  *  Copyright (C) 1998 Alan Cox
  */
+
 /*
  * 02.12.91 - Changed to static variables to indicate need for reset
  * and recalibrate. This makes some things easier (output_byte reset
@@ -149,7 +150,7 @@
 #define REALLY_SLOW_IO
 
 #define DEBUGT 2
-#define DCL_DEBUG               /* debug disk change line */
+#define DCL_DEBUG       /* debug disk change line */
 
 /* do print messages for unexpected interrupts */
 static int print_unex = 1;
@@ -161,10 +162,8 @@ static int print_unex = 1;
 #include <linux/workqueue.h>
 #define FDPATCHES
 #include <linux/fdreg.h>
-
 #include <linux/fd.h>
 #include <linux/hdreg.h>
-
 #include <linux/errno.h>
 #include <linux/slab.h>
 #include <linux/mm.h>
@@ -274,8 +273,7 @@ static inline void fallback_on_nodma_alloc(char **addr, size_t l)
                 return;         /* we have the memory */
         if (can_use_virtual_dma != 2)
                 return;         /* no fallback allowed */
-        printk
-            ("DMA memory shortage. Temporarily falling back on virtual DMA\n");
+        printk("DMA memory shortage. Temporarily falling back on virtual DMA\n");
         *addr = (char *)nodma_mem_alloc(l);
 #else
         return;
@@ -291,8 +289,8 @@ static int initialising = 1;
 #define TOMINOR(x) ((x & 3) | ((x & 4) << 5))
 #define UNIT(x) ((x) & 0x03)    /* drive on fdc */
 #define FDC(x) (((x) & 0x04) >> 2)      /* fdc of drive */
+        /* reverse mapping from unit and fdc to drive */
 #define REVDRIVE(fdc, unit) ((unit) + ((fdc) << 2))
-                                /* reverse mapping from unit and fdc to drive */
 #define DP (&drive_params[current_drive])
 #define DRS (&drive_state[current_drive])
 #define DRWE (&write_errors[current_drive])
@@ -356,7 +354,6 @@ static int inr;			/* size of reply buffer, when called from interrupt */
 #define R_HEAD (reply_buffer[4])
 #define R_SECTOR (reply_buffer[5])
 #define R_SIZECODE (reply_buffer[6])
-
 #define SEL_DLY (2*HZ/100)
 
 /*
@@ -472,8 +469,8 @@ static struct floppy_struct floppy_type[32] = {
         { 6400,40,2,80,0,0x25,0x5B,0xCF,0x00,"E3200" }, /* 26 3.20MB 3.5"   */
         { 7040,44,2,80,0,0x25,0x5B,0xCF,0x00,"E3520" }, /* 27 3.52MB 3.5"   */
         { 7680,48,2,80,0,0x25,0x63,0xCF,0x00,"E3840" }, /* 28 3.84MB 3.5"   */
-
         { 3680,23,2,80,0,0x1C,0x10,0xCF,0x00,"H1840" }, /* 29 1.84MB 3.5"   */
+
         { 1600,10,2,80,0,0x25,0x02,0xDF,0x2E,"D800"  }, /* 30 800KB 3.5"    */
         { 3200,20,2,80,0,0x1C,0x00,0xCF,0x2C,"H1600" }, /* 31 1.6MB 3.5"    */
 };
@@ -539,12 +536,12 @@ static char *floppy_track_buffer;
 static int max_buffer_sectors;
 
 static int *errors;
-typedef void (*done_f) (int);
+typedef void (*done_f)(int);
 static struct cont_t {
-        void (*interrupt) (void);       /* this is called after the interrupt of the
+        void (*interrupt)(void);        /* this is called after the interrupt of the
                                          * main command */
-        void (*redo) (void);    /* this is called to retry the operation */
-        void (*error) (void);   /* this is called to tally an error */
+        void (*redo)(void);     /* this is called to retry the operation */
+        void (*error)(void);    /* this is called to tally an error */
         done_f done;            /* this is called to say if the operation has
                                  * succeeded/failed */
 } *cont;
@@ -694,7 +691,6 @@ static void reschedule_timeout(int drive, const char *message, int marg)
 }
 
 #define INFBOUND(a,b) (a)=max_t(int, a, b)
-
 #define SUPBOUND(a,b) (a)=min_t(int, a, b)
 
 /*
@@ -733,6 +729,7 @@ static void reschedule_timeout(int drive, const char *message, int marg)
 static int disk_change(int drive)
 {
         int fdc = FDC(drive);
+
 #ifdef FLOPPY_SANITY_CHECK
         if (time_before(jiffies, UDRS->select_date + UDP->select_delay))
                 DPRINT("WARNING disk change called early\n");
@@ -892,7 +889,6 @@ static int _lock_fdc(int drive, int interruptible, int line)
 
                 set_current_state(TASK_RUNNING);
                 remove_wait_queue(&fdc_wait, &wait);
-
                 flush_scheduled_work();
         }
         command_status = FD_COMMAND_NONE;
@@ -968,7 +964,9 @@ static void floppy_off(unsigned int drive)
  */
 static void scandrives(void)
 {
-        int i, drive, saved_drive;
+        int i;
+        int drive;
+        int saved_drive;
 
         if (DP->select_delay)
                 return;
@@ -1146,7 +1144,9 @@ static void show_floppy(void);
 /* waits until the fdc becomes ready */
 static int wait_til_ready(void)
 {
-        int counter, status;
+        int status;
+        int counter;
+
         if (FDCS->reset)
                 return -1;
         for (counter = 0; counter < 10000; counter++) {
@@ -1193,7 +1193,8 @@ static int output_byte(char byte)
 /* gets the response from the fdc */
 static int result(void)
 {
-        int i, status = 0;
+        int i;
+        int status = 0;
 
         for (i = 0; i < MAX_REPLIES; i++) {
                 if ((status = wait_til_ready()) < 0)
@@ -1226,6 +1227,7 @@ static int result(void)
 static int need_more_output(void)
 {
         int status;
+
         if ((status = wait_til_ready()) < 0)
                 return -1;
         if ((status & (STATUS_READY | STATUS_DIR | STATUS_DMA)) == STATUS_READY)
@@ -1309,8 +1311,11 @@ static int fdc_configure(void)
  */
 static void fdc_specify(void)
 {
-        unsigned char spec1, spec2;
-        unsigned long srt, hlt, hut;
+        unsigned char spec1;
+        unsigned char spec2;
+        unsigned long srt;
+        unsigned long hlt;
+        unsigned long hut;
         unsigned long dtr = NOMINAL_DTR;
         unsigned long scale_dtr = NOMINAL_DTR;
         int hlt_max_code = 0x7f;
@@ -1472,7 +1477,6 @@ static int interpret_errors(void)
                                 tell_sector();
                         }
                         printk("\n");
-
                 }
                 if (ST2 & ST2_WC || ST2 & ST2_BC)
                         /* wrong cylinder => recal */
@@ -1498,7 +1502,10 @@ static int interpret_errors(void)
  */
 static void setup_rw_floppy(void)
 {
-        int i, r, flags, dflags;
+        int i;
+        int r;
+        int flags;
+        int dflags;
         unsigned long ready_date;
         timeout_fn function;
 
@@ -1728,9 +1735,9 @@ static void print_result(char *message, int inr)
 /* interrupt handler. Note that this can be called externally on the Sparc */
 irqreturn_t floppy_interrupt(int irq, void *dev_id)
 {
-        void (*handler) (void) = do_floppy;
         int do_print;
         unsigned long f;
+        void (*handler)(void) = do_floppy;
 
         lasthandler = handler;
         interruptjiffies = jiffies;
@@ -1915,9 +1922,10 @@ static void floppy_shutdown(unsigned long data)
 /*typedef void (*timeout_fn)(unsigned long);*/
 
 /* start motor, check media-changed condition and write protection */
-static int start_motor(void (*function) (void))
+static int start_motor(void (*function)(void))
 {
-        int mask, data;
+        int mask;
+        int data;
 
         mask = 0xfc;
         data = UNIT(current_drive);
@@ -2020,17 +2028,17 @@ static struct cont_t wakeup_cont = {
         .interrupt      = empty,
         .redo           = do_wakeup,
         .error          = empty,
-        .done           = (done_f) empty
+        .done           = (done_f)empty
 };
 
 static struct cont_t intr_cont = {
         .interrupt      = empty,
         .redo           = process_fd_request,
         .error          = empty,
-        .done           = (done_f) empty
+        .done           = (done_f)empty
 };
 
-static int wait_til_done(void (*handler) (void), int interruptible)
+static int wait_til_done(void (*handler)(void), int interruptible)
 {
         int ret;
 
@@ -2049,7 +2057,6 @@ static int wait_til_done(void (*handler) (void), int interruptible)
                                 break;
 
                         is_alive("wait_til_done");
-
                         schedule();
                 }
 
@@ -2141,6 +2148,7 @@ static void bad_flp_intr(void)
 static void set_floppy(int drive)
 {
         int type = ITYPE(UDRS->fd_device);
+
         if (type)
                 _floppy = floppy_type + type;
         else
@@ -2169,11 +2177,14 @@ static void format_interrupt(void)
 #define CT(x) ((x) | 0xc0)
 static void setup_format_params(int track)
 {
+        int n;
+        int il;
+        int count;
+        int head_shift;
+        int track_shift;
         struct fparm {
                 unsigned char track, head, sect, size;
         } *here = (struct fparm *)floppy_track_buffer;
-        int il, n;
-        int count, head_shift, track_shift;
 
         raw_cmd = &default_raw_cmd;
         raw_cmd->track = track;
@@ -2344,7 +2355,10 @@ static void request_done(int uptodate)
 /* Interrupt handler evaluating the result of the r/w operation */
 static void rw_interrupt(void)
 {
-        int nr_sectors, ssize, eoc, heads;
+        int eoc;
+        int ssize;
+        int heads;
+        int nr_sectors;
 
         if (R_HEAD >= 2) {
                 /* some Toshiba floppy controllers occasionnally seem to
@@ -2476,7 +2490,8 @@ static void copy_buffer(int ssize, int max_sector, int max_sector_2)
 {
         int remaining;          /* number of transferred 512-byte sectors */
         struct bio_vec *bv;
-        char *buffer, *dma_buffer;
+        char *buffer;
+        char *dma_buffer;
         int size;
         struct req_iterator iter;
 
@@ -2578,7 +2593,8 @@ static inline int check_dma_crossing(char *start,
  */
 static void virtualdmabug_workaround(void)
 {
-        int hard_sectors, end_sector;
+        int hard_sectors;
+        int end_sector;
 
         if (CT(COMMAND) == FD_WRITE) {
                 COMMAND &= ~0x80;       /* switch off multiple track mode */
@@ -2610,7 +2626,10 @@ static void virtualdmabug_workaround(void)
 static int make_raw_rw_request(void)
 {
         int aligned_sector_t;
-        int max_sector, max_size, tracksize, ssize;
+        int max_sector;
+        int max_size;
+        int tracksize;
+        int ssize;
 
         if (max_buffer_sectors == 0) {
                 printk("VFS: Block I/O scheduled on unopened device\n");
@@ -2777,8 +2796,8 @@ static int make_raw_rw_request(void)
                                        indirect, direct, fsector_t);
                                 return 0;
                         }
-/*                      check_dma_crossing(raw_cmd->kernel_data, 
-                                           raw_cmd->length, 
+/*                      check_dma_crossing(raw_cmd->kernel_data,
+                                           raw_cmd->length,
                                            "end of make_raw_request [1]");*/
 
                         virtualdmabug_workaround();
@@ -3011,6 +3030,7 @@ static struct cont_t poll_cont = {
 static int poll_drive(int interruptible, int flag)
 {
         int ret;
+
         /* no auto-sense, just clear dcl */
         raw_cmd = &default_raw_cmd;
         raw_cmd->flags = flag;
@@ -3173,7 +3193,8 @@ static inline int raw_cmd_copyout(int cmd, char __user *param,
 
 static void raw_cmd_free(struct floppy_raw_cmd **ptr)
 {
-        struct floppy_raw_cmd *next, *this;
+        struct floppy_raw_cmd *next;
+        struct floppy_raw_cmd *this;
 
         this = *ptr;
         *ptr = NULL;
@@ -3245,8 +3266,10 @@ static inline int raw_cmd_copyin(int cmd, char __user *param,
 
 static int raw_cmd_ioctl(int cmd, void __user *param)
 {
-        int drive, ret, ret2;
         struct floppy_raw_cmd *my_raw_cmd;
+        int drive;
+        int ret2;
+        int ret;
 
         if (FDCS->rawcmd <= 1)
                 FDCS->rawcmd = 1;
@@ -3453,7 +3476,8 @@ static int fd_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
 #define IN(c,x,tag) case c: *(x) = inparam. tag ; return 0
 
         int drive = (long)inode->i_bdev->bd_disk->private_data;
-        int i, type = ITYPE(UDRS->fd_device);
+        int type = ITYPE(UDRS->fd_device);
+        int i;
         int ret;
         int size;
         union inparam {
@@ -3619,8 +3643,7 @@ static void __init config_types(void)
         if (!UDP->cmos && FLOPPY1_TYPE)
                 UDP->cmos = FLOPPY1_TYPE;
 
-        /* XXX */
-        /* additional physical CMOS drive detection should go here */
+        /* FIXME: additional physical CMOS drive detection should go here */
 
         for (drive = 0; drive < N_DRIVE; drive++) {
                 unsigned int type = UDP->cmos;
@@ -3903,13 +3926,13 @@ static int floppy_revalidate(struct gendisk *disk)
 }
 
 static struct block_device_operations floppy_fops = {
-        .owner          = THIS_MODULE,
-        .open           = floppy_open,
-        .release        = floppy_release,
-        .ioctl          = fd_ioctl,
-        .getgeo         = fd_getgeo,
-        .media_changed  = check_floppy_change,
-        .revalidate_disk = floppy_revalidate,
+        .owner                  = THIS_MODULE,
+        .open                   = floppy_open,
+        .release                = floppy_release,
+        .ioctl                  = fd_ioctl,
+        .getgeo                 = fd_getgeo,
+        .media_changed          = check_floppy_change,
+        .revalidate_disk        = floppy_revalidate,
 };
 
 /*
@@ -4428,8 +4451,8 @@ static int floppy_grab_irq_and_dma(void)
                 if (FDCS->address != -1)
                         fd_outb(FDCS->dor, FD_DOR);
         /*
-         *      The driver will try and free resources and relies on us
-         *      to know if they were allocated or not.
+         * The driver will try and free resources and relies on us
+         * to know if they were allocated or not.
          */
         fdc = 0;
         irqdma_allocated = 1;