ide: ide_dev_is_sata() -> ata_id_is_sata()

* Use optimized ATA version check from Sergei in ata_id_is_sata().

* ide_dev_is_sata() -> ata_id_is_sata()

Cc: Jeff Garzik <jgarzik@pobox.com>
Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

1 files changed, 9 insertions, 1 deletions

diff --git a/include/linux/ata.h b/include/linux/ata.h
index be00973d1a8c..d28aad991c75 100644
--- a/include/linux/ata.h
+++ b/include/linux/ata.h
@@ -645,7 +645,15 @@ static inline unsigned int ata_id_major_version(const u16 *id)
 
 static inline int ata_id_is_sata(const u16 *id)
 {
-        return ata_id_major_version(id) >= 5 && id[ATA_ID_HW_CONFIG] == 0;
+        /*
+         * See if word 93 is 0 AND drive is at least ATA-5 compatible
+         * verifying that word 80 by casting it to a signed type --
+         * this trick allows us to filter out the reserved values of
+         * 0x0000 and 0xffff along with the earlier ATA revisions...
+         */
+        if (id[ATA_ID_HW_CONFIG] == 0 && (short)id[ATA_ID_MAJOR_VER] >= 0x0020)
+                return 1;
+        return 0;
 }
 
 static inline int ata_id_has_tpm(const u16 *id)