linux-kernel - [PATCH] libata: test major version in ata_id_is

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Date:	Wed, 21 Feb 2007 20:25:08 +0900
From:	Tejun Heo <htejun@...il.com>
To:	Jeff Garzik <jeff@...zik.org>
Cc:	Alan Cox <alan@...rguk.ukuu.org.uk>, linux-ide@...r.kernel.org,
	LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH] libata: test major version in ata_id_is_sata()

Test major version in ata_id_is_sata() not separately.

Signed-off-by: Tejun Heo <htejun@...il.com>

diff --git a/include/linux/ata.h b/include/linux/ata.h
index 272736e..c331da2 100644
--- a/include/linux/ata.h
+++ b/include/linux/ata.h
@@ -282,7 +282,6 @@ struct ata_taskfile {
 };
 
 #define ata_id_is_ata(id)	(((id)[0] & (1 << 15)) == 0)
-#define ata_id_is_sata(id)	((id)[93] == 0)
 #define ata_id_rahead_enabled(id) ((id)[85] & (1 << 6))
 #define ata_id_wcache_enabled(id) ((id)[85] & (1 << 5))
 #define ata_id_hpa_enabled(id)	((id)[85] & (1 << 10))
@@ -324,6 +323,11 @@ static inline unsigned int ata_id_major_version(const u16 *id)
 	return mver;
 }
 
+static inline int ata_id_is_sata(const u16 *id)
+{
+	return ata_id_major_version(id) >= 5 && id[93] == 0;
+}
+
 static inline int ata_id_current_chs_valid(const u16 *id)
 {
 	/* For ATA-1 devices, if the INITIALIZE DEVICE PARAMETERS command
@@ -350,7 +354,7 @@ static inline int ata_id_is_cfa(const u16 *id)
 
 static inline int ata_drive_40wire(const u16 *dev_id)
 {
-	if (ata_id_major_version(dev_id) >= 5 && ata_id_is_sata(dev_id))
+	if (ata_id_is_sata(dev_id))
 		return 0;	/* SATA */
 	if ((dev_id[93] & 0xE000) == 0x6000)
 		return 0;	/* 80 wire */
-
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