1 files changed, 21 insertions, 0 deletions

diff --git a/include/linux/ata.h b/include/linux/ata.h
index 81d9adeb819e..4c3f50070033 100644
--- a/include/linux/ata.h
+++ b/include/linux/ata.h
@@ -30,6 +30,7 @@
 #define __LINUX_ATA_H__
 
 #include <linux/types.h>
+#include <asm/byteorder.h>
 
 /* defines only for the constants which don't work well as enums */
 #define ATA_DMA_BOUNDARY        0xffffUL
@@ -781,6 +782,26 @@ static inline int atapi_id_dmadir(const u16 *dev_id)
         return ata_id_major_version(dev_id) >= 7 && (dev_id[62] & 0x8000);
 }
 
+static inline void ata_id_to_hd_driveid(u16 *id)
+{
+#ifdef __BIG_ENDIAN
+        /* accessed in struct hd_driveid as 8-bit values */
+        id[ATA_ID_MAX_MULTSECT]  = __cpu_to_le16(id[ATA_ID_MAX_MULTSECT]);
+        id[ATA_ID_CAPABILITY]    = __cpu_to_le16(id[ATA_ID_CAPABILITY]);
+        id[ATA_ID_OLD_PIO_MODES] = __cpu_to_le16(id[ATA_ID_OLD_PIO_MODES]);
+        id[ATA_ID_OLD_DMA_MODES] = __cpu_to_le16(id[ATA_ID_OLD_DMA_MODES]);
+        id[ATA_ID_MULTSECT]      = __cpu_to_le16(id[ATA_ID_MULTSECT]);
+
+        /* as 32-bit values */
+        *(u32 *)&id[ATA_ID_LBA_CAPACITY] = ata_id_u32(id, ATA_ID_LBA_CAPACITY);
+        *(u32 *)&id[ATA_ID_SPG]          = ata_id_u32(id, ATA_ID_SPG);
+
+        /* as 64-bit value */
+        *(u64 *)&id[ATA_ID_LBA_CAPACITY_2] =
+                ata_id_u64(id, ATA_ID_LBA_CAPACITY_2);
+#endif
+}
+
 static inline int is_multi_taskfile(struct ata_taskfile *tf)
 {
         return (tf->command == ATA_CMD_READ_MULTI) ||