ide: do not access ide_drive_t 'drive_data' field directly

Change ide_drive_t 'drive_data' field from 'unsigned int' type to 'void *'
type, allowing a wider range of values/types to be stored in this field.

Added 'ide_get_drivedata' and 'ide_set_drivedata' helpers to get and set
the 'drive_data' field.

Fixed all host drivers to maintain coherency with the change in the
'drive_data' field type.

Signed-off-by: Joao Ramos <joao.ramos@inov.pt>
[bart: fix qd65xx build, cast to 'unsigned long', minor Coding Style fixups]
Acked-by: Sergei Shtylyov <sshtylyov@ru.montavista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

1 files changed, 24 insertions, 9 deletions

diff --git a/drivers/ide/ht6560b.c b/drivers/ide/ht6560b.c
index 2fb0f2965009..aafed8060e17 100644
--- a/drivers/ide/ht6560b.c
+++ b/drivers/ide/ht6560b.c
@@ -44,7 +44,12 @@
  *    bit3 (0x08): "1" 3 cycle time, "0" 2 cycle time         (?)
  */
 #define HT_CONFIG_PORT    0x3e6
-#define HT_CONFIG(drivea) (u8)(((drivea)->drive_data & 0xff00) >> 8)
+
+static inline u8 HT_CONFIG(ide_drive_t *drive)
+{
+        return ((unsigned long)ide_get_drivedata(drive) & 0xff00) >> 8;
+}
+
 /*
  * FIFO + PREFETCH (both a/b-model)
  */
@@ -90,7 +95,11 @@
  * Active Time for each drive. Smaller value gives higher speed.
  * In case of failures you should probably fall back to a higher value.
  */
-#define HT_TIMING(drivea) (u8)((drivea)->drive_data & 0x00ff)
+static inline u8 HT_TIMING(ide_drive_t *drive)
+{
+        return (unsigned long)ide_get_drivedata(drive) & 0x00ff;
+}
+
 #define HT_TIMING_DEFAULT 0xff
 
 /*
@@ -242,23 +251,27 @@ static DEFINE_SPINLOCK(ht6560b_lock);
  */
 static void ht_set_prefetch(ide_drive_t *drive, u8 state)
 {
-        unsigned long flags;
+        unsigned long flags, config;
         int t = HT_PREFETCH_MODE << 8;
 
         spin_lock_irqsave(&ht6560b_lock, flags);
 
+        config = (unsigned long)ide_get_drivedata(drive);
+
         /*
          *  Prefetch mode and unmask irq seems to conflict
          */
         if (state) {
-                drive->drive_data |= t;   /* enable prefetch mode */
+                config |= t;   /* enable prefetch mode */
                 drive->dev_flags |= IDE_DFLAG_NO_UNMASK;
                 drive->dev_flags &= ~IDE_DFLAG_UNMASK;
         } else {
-                drive->drive_data &= ~t;  /* disable prefetch mode */
+                config &= ~t;  /* disable prefetch mode */
                 drive->dev_flags &= ~IDE_DFLAG_NO_UNMASK;
         }
 
+        ide_set_drivedata(drive, (void *)config);
+
         spin_unlock_irqrestore(&ht6560b_lock, flags);
 
 #ifdef DEBUG
@@ -268,7 +281,7 @@ static void ht_set_prefetch(ide_drive_t *drive, u8 state)
 
 static void ht6560b_set_pio_mode(ide_drive_t *drive, const u8 pio)
 {
-        unsigned long flags;
+        unsigned long flags, config;
         u8 timing;
         
         switch (pio) {
@@ -281,8 +294,10 @@ static void ht6560b_set_pio_mode(ide_drive_t *drive, const u8 pio)
         timing = ht_pio2timings(drive, pio);
 
         spin_lock_irqsave(&ht6560b_lock, flags);
-        drive->drive_data &= 0xff00;
-        drive->drive_data |= timing;
+        config = (unsigned long)ide_get_drivedata(drive);
+        config &= 0xff00;
+        config |= timing;
+        ide_set_drivedata(drive, (void *)config);
         spin_unlock_irqrestore(&ht6560b_lock, flags);
 
 #ifdef DEBUG
@@ -299,7 +314,7 @@ static void __init ht6560b_init_dev(ide_drive_t *drive)
         if (hwif->channel)
                 t |= (HT_SECONDARY_IF << 8);
 
-        drive->drive_data = t;
+        ide_set_drivedata(drive, (void *)t);
 }
 
 static int probe_ht6560b;