[PATCH] cdrom.c cleanups

From: Alexander Viro (viro@math.psu.edu)
Date: Thu Jul 04 2002 - 23:42:06 EST


        * Bunch of functions in cdrom.c used to get kdev_t and use it
only to do cdrom_find_device(dev), even though their callers already
had struct cdrom_device_info * in question. Switched to passing
said pointer directly.
        * useless exports removed; stuff not used outside of cdrom.c
made static.

diff -urN C24-0/drivers/cdrom/cdrom.c C24-current/drivers/cdrom/cdrom.c
--- C24-0/drivers/cdrom/cdrom.c Wed Apr 3 20:23:26 2002
+++ C24-current/drivers/cdrom/cdrom.c Sun Jun 23 19:04:01 2002
@@ -318,8 +318,9 @@
 static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
                      unsigned long arg);
 
-int cdrom_get_last_written(kdev_t dev, long *last_written);
-int cdrom_get_next_writable(kdev_t dev, long *next_writable);
+int cdrom_get_last_written(struct cdrom_device_info *, long *);
+static int cdrom_get_next_writable(struct cdrom_device_info *, long *);
+static void cdrom_count_tracks(struct cdrom_device_info *, tracktype*);
 
 #ifdef CONFIG_SYSCTL
 static void cdrom_sysctl_register(void);
@@ -436,7 +437,7 @@
         return 0;
 }
 
-struct cdrom_device_info *cdrom_find_device(kdev_t dev)
+static struct cdrom_device_info *cdrom_find_device(kdev_t dev)
 {
         struct cdrom_device_info *cdi;
 
@@ -775,7 +776,7 @@
         return cdi->ops->generic_packet(cdi, &cgc);
 }
 
-int cdrom_select_disc(struct cdrom_device_info *cdi, int slot)
+static int cdrom_select_disc(struct cdrom_device_info *cdi, int slot)
 {
         struct cdrom_changer_info info;
         int curslot;
@@ -859,7 +860,7 @@
 }
 
 /* badly broken, I know. Is due for a fixup anytime. */
-void cdrom_count_tracks(struct cdrom_device_info *cdi, tracktype* tracks)
+static void cdrom_count_tracks(struct cdrom_device_info *cdi, tracktype* tracks)
 {
         struct cdrom_tochdr header;
         struct cdrom_tocentry entry;
@@ -1921,7 +1922,6 @@
 {
         struct cdrom_device_ops *cdo = cdi->ops;
         struct cdrom_generic_command cgc;
- kdev_t dev = cdi->dev;
         char buffer[32];
         int ret = 0;
 
@@ -2193,7 +2193,7 @@
         case CDROM_NEXT_WRITABLE: {
                 long next = 0;
                 cdinfo(CD_DO_IOCTL, "entering CDROM_NEXT_WRITABLE\n");
- if ((ret = cdrom_get_next_writable(dev, &next)))
+ if ((ret = cdrom_get_next_writable(cdi, &next)))
                         return ret;
                 IOCTL_OUT(arg, long, next);
                 return 0;
@@ -2201,7 +2201,7 @@
         case CDROM_LAST_WRITTEN: {
                 long last = 0;
                 cdinfo(CD_DO_IOCTL, "entering CDROM_LAST_WRITTEN\n");
- if ((ret = cdrom_get_last_written(dev, &last)))
+ if ((ret = cdrom_get_last_written(cdi, &last)))
                         return ret;
                 IOCTL_OUT(arg, long, last);
                 return 0;
@@ -2211,10 +2211,9 @@
         return -ENOTTY;
 }
 
-int cdrom_get_track_info(kdev_t dev, __u16 track, __u8 type,
+static int cdrom_get_track_info(struct cdrom_device_info *cdi, __u16 track, __u8 type,
                          track_information *ti)
 {
- struct cdrom_device_info *cdi = cdrom_find_device(dev);
         struct cdrom_device_ops *cdo = cdi->ops;
         struct cdrom_generic_command cgc;
         int ret;
@@ -2241,9 +2240,8 @@
 }
 
 /* requires CD R/RW */
-int cdrom_get_disc_info(kdev_t dev, disc_information *di)
+static int cdrom_get_disc_info(struct cdrom_device_info *cdi, disc_information *di)
 {
- struct cdrom_device_info *cdi = cdrom_find_device(dev);
         struct cdrom_device_ops *cdo = cdi->ops;
         struct cdrom_generic_command cgc;
         int ret;
@@ -2273,9 +2271,8 @@
 
 /* return the last written block on the CD-R media. this is for the udf
    file system. */
-int cdrom_get_last_written(kdev_t dev, long *last_written)
-{
- struct cdrom_device_info *cdi = cdrom_find_device(dev);
+int cdrom_get_last_written(struct cdrom_device_info *cdi, long *last_written)
+{
         struct cdrom_tocentry toc;
         disc_information di;
         track_information ti;
@@ -2285,17 +2282,17 @@
         if (!CDROM_CAN(CDC_GENERIC_PACKET))
                 goto use_toc;
 
- if ((ret = cdrom_get_disc_info(dev, &di)))
+ if ((ret = cdrom_get_disc_info(cdi, &di)))
                 goto use_toc;
 
         last_track = (di.last_track_msb << 8) | di.last_track_lsb;
- if ((ret = cdrom_get_track_info(dev, last_track, 1, &ti)))
+ if ((ret = cdrom_get_track_info(cdi, last_track, 1, &ti)))
                 goto use_toc;
 
         /* if this track is blank, try the previous. */
         if (ti.blank) {
                 last_track--;
- if ((ret = cdrom_get_track_info(dev, last_track, 1, &ti)))
+ if ((ret = cdrom_get_track_info(cdi, last_track, 1, &ti)))
                         goto use_toc;
         }
 
@@ -2325,9 +2322,8 @@
 }
 
 /* return the next writable block. also for udf file system. */
-int cdrom_get_next_writable(kdev_t dev, long *next_writable)
+static int cdrom_get_next_writable(struct cdrom_device_info *cdi, long *next_writable)
 {
- struct cdrom_device_info *cdi = cdrom_find_device(dev);
         disc_information di;
         track_information ti;
         __u16 last_track;
@@ -2336,17 +2332,17 @@
         if (!CDROM_CAN(CDC_GENERIC_PACKET))
                 goto use_last_written;
 
- if ((ret = cdrom_get_disc_info(dev, &di)))
+ if ((ret = cdrom_get_disc_info(cdi, &di)))
                 goto use_last_written;
 
         last_track = (di.last_track_msb << 8) | di.last_track_lsb;
- if ((ret = cdrom_get_track_info(dev, last_track, 1, &ti)))
+ if ((ret = cdrom_get_track_info(cdi, last_track, 1, &ti)))
                 goto use_last_written;
 
         /* if this track is blank, try the previous. */
         if (ti.blank) {
                 last_track--;
- if ((ret = cdrom_get_track_info(dev, last_track, 1, &ti)))
+ if ((ret = cdrom_get_track_info(cdi, last_track, 1, &ti)))
                         goto use_last_written;
         }
 
@@ -2359,7 +2355,7 @@
         return 0;
 
 use_last_written:
- if ((ret = cdrom_get_last_written(dev, next_writable))) {
+ if ((ret = cdrom_get_last_written(cdi, next_writable))) {
                 *next_writable = 0;
                 return ret;
         } else {
@@ -2368,11 +2364,7 @@
         }
 }
 
-EXPORT_SYMBOL(cdrom_get_disc_info);
-EXPORT_SYMBOL(cdrom_get_track_info);
-EXPORT_SYMBOL(cdrom_get_next_writable);
 EXPORT_SYMBOL(cdrom_get_last_written);
-EXPORT_SYMBOL(cdrom_count_tracks);
 EXPORT_SYMBOL(register_cdrom);
 EXPORT_SYMBOL(unregister_cdrom);
 EXPORT_SYMBOL(cdrom_open);
@@ -2380,11 +2372,9 @@
 EXPORT_SYMBOL(cdrom_ioctl);
 EXPORT_SYMBOL(cdrom_media_changed);
 EXPORT_SYMBOL(cdrom_number_of_slots);
-EXPORT_SYMBOL(cdrom_select_disc);
 EXPORT_SYMBOL(cdrom_mode_select);
 EXPORT_SYMBOL(cdrom_mode_sense);
 EXPORT_SYMBOL(init_cdrom_command);
-EXPORT_SYMBOL(cdrom_find_device);
 
 #ifdef CONFIG_SYSCTL
 
diff -urN C24-0/drivers/ide/ide-cd.c C24-current/drivers/ide/ide-cd.c
--- C24-0/drivers/ide/ide-cd.c Thu Jun 20 13:37:03 2002
+++ C24-current/drivers/ide/ide-cd.c Sun Jun 23 16:45:26 2002
@@ -1937,9 +1937,9 @@
 /* Try to read the entire TOC for the disk into our internal buffer. */
 static int cdrom_read_toc(struct ata_device *drive, struct request_sense *sense)
 {
- int minor, stat, ntracks, i;
- kdev_t dev;
+ int stat, ntracks, i;
         struct cdrom_info *info = drive->driver_data;
+ struct cdrom_device_info *cdi = &info->devinfo;
         struct atapi_toc *toc = info->toc;
         struct {
                 struct atapi_toc_header hdr;
@@ -2071,10 +2071,8 @@
         toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
 
         /* Now try to get the total cdrom capacity. */
- minor = (drive->select.b.unit) << PARTN_BITS;
- dev = mk_kdev(drive->channel->major, minor);
         /* FIXME: This is making worng assumptions about register layout. */
- stat = cdrom_get_last_written(dev, (unsigned long *) &toc->capacity);
+ stat = cdrom_get_last_written(cdi, (unsigned long *) &toc->capacity);
         if (stat)
                 stat = cdrom_read_capacity(drive, &toc->capacity, sense);
         if (stat)
diff -urN C24-0/drivers/scsi/sr.c C24-current/drivers/scsi/sr.c
--- C24-0/drivers/scsi/sr.c Thu Jun 20 13:37:24 2002
+++ C24-current/drivers/scsi/sr.c Sun Jun 23 16:49:49 2002
@@ -522,8 +522,8 @@
                 SCp->needs_sector_size = 1;
         } else {
 #if 0
- if (cdrom_get_last_written(mkdev(MAJOR_NR, i),
- &scsi_CDs[i].capacity))
+ if (cdrom_get_last_written(&SCp->cdi,
+ &SCp->capacity))
 #endif
                         SCp->capacity = 1 + ((buffer[0] << 24) |
                                                     (buffer[1] << 16) |
diff -urN C24-0/include/linux/cdrom.h C24-current/include/linux/cdrom.h
--- C24-0/include/linux/cdrom.h Mon May 27 14:54:52 2002
+++ C24-current/include/linux/cdrom.h Sun Jun 23 16:56:20 2002
@@ -805,11 +805,8 @@
     long error;
 } tracktype;
 
-extern void cdrom_count_tracks(struct cdrom_device_info *cdi,tracktype* tracks);
-extern int cdrom_get_next_writable(kdev_t dev, long *next_writable);
-extern int cdrom_get_last_written(kdev_t dev, long *last_written);
+extern int cdrom_get_last_written(struct cdrom_device_info *cdi, long *last_written);
 extern int cdrom_number_of_slots(struct cdrom_device_info *cdi);
-extern int cdrom_select_disc(struct cdrom_device_info *cdi, int slot);
 extern int cdrom_mode_select(struct cdrom_device_info *cdi,
                              struct cdrom_generic_command *cgc);
 extern int cdrom_mode_sense(struct cdrom_device_info *cdi,
@@ -817,7 +814,6 @@
                             int page_code, int page_control);
 extern void init_cdrom_command(struct cdrom_generic_command *cgc,
                                void *buffer, int len, int type);
-extern struct cdrom_device_info *cdrom_find_device(kdev_t dev);
 
 typedef struct {
         __u16 disc_information_length;
@@ -900,10 +896,6 @@
         __u32 track_size;
         __u32 last_rec_address;
 } track_information;
-
-extern int cdrom_get_disc_info(kdev_t dev, disc_information *di);
-extern int cdrom_get_track_info(kdev_t dev, __u16 track, __u8 type,
- track_information *ti);
 
 /* The SCSI spec says there could be 256 slots. */
 #define CDROM_MAX_SLOTS 256

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