ide-disk: use ide_get_lba_addr()

* Export ide_get_lba_addr().

* Convert idedisk_{read_native,set}_max_address() to use ide_get_lba_addr().

* Remove incorrect comment from idedisk_read_native_max_address()
  (noticed by Sergei).

There should be no functionality changes caused by this patch.

Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

drivers/ide/ide-disk.c

@@ -326,18 +326,9 @@ static u64 idedisk_read_native_max_address(ide_drive_t *drive, int lba48)
 	ide_no_data_taskfile(drive, &args);
 
 	/* if OK, compute maximum address value */
-	if ((tf->status & 0x01) == 0) {
-		u32 high, low;
+	if ((tf->status & 0x01) == 0)
+		addr = ide_get_lba_addr(tf, lba48) + 1;
 
-		if (lba48)
-			high = (tf->hob_lbah << 16) | (tf->hob_lbam << 8) |
-				tf->hob_lbal;
-		else
-			high = tf->device & 0xf;
-		low  = (tf->lbah << 16) | (tf->lbam << 8) | tf->lbal;
-		addr = ((__u64)high << 24) | low;
-		addr++;	/* since the return value is (maxlba - 1), we add 1 */
-	}
 	return addr;
 }
 
@@ -373,18 +364,9 @@ static u64 idedisk_set_max_address(ide_drive_t *drive, u64 addr_req, int lba48)
 	/* submit command request */
 	ide_no_data_taskfile(drive, &args);
 	/* if OK, compute maximum address value */
-	if ((tf->status & 0x01) == 0) {
-		u32 high, low;
+	if ((tf->status & 0x01) == 0)
+		addr_set = ide_get_lba_addr(tf, lba48) + 1;
 
-		if (lba48)
-			high = (tf->hob_lbah << 16) | (tf->hob_lbam << 8) |
-				tf->hob_lbal;
-		else
-			high = tf->device & 0xf;
-		low  = (tf->lbah << 16) | (tf->lbam << 8) | tf->lbal;
-		addr_set = ((__u64)high << 24) | low;
-		addr_set++;
-	}
 	return addr_set;
 }
 

drivers/ide/ide-lib.c

@@ -479,7 +479,7 @@ static void ide_dump_opcode(ide_drive_t *drive)
 		printk("0x%02x\n", opcode);
 }
 
-static u64 ide_get_lba_addr(struct ide_taskfile *tf, int lba48)
+u64 ide_get_lba_addr(struct ide_taskfile *tf, int lba48)
 {
 	u32 high, low;
 
@@ -492,6 +492,7 @@ static u64 ide_get_lba_addr(struct ide_taskfile *tf, int lba48)
 
 	return ((u64)high << 24) | low;
 }
+EXPORT_SYMBOL_GPL(ide_get_lba_addr);
 
 static void ide_dump_sector(ide_drive_t *drive)
 {

include/linux/ide.h

@@ -1238,6 +1238,7 @@ static inline int ide_dev_is_sata(struct hd_driveid *id)
 	return 0;
 }
 
+u64 ide_get_lba_addr(struct ide_taskfile *, int);
 u8 ide_dump_status(ide_drive_t *, const char *, u8);
 
 typedef struct ide_pio_timings_s {