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authorBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2008-10-10 22:39:31 +0200
committerBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2008-10-10 22:39:31 +0200
commitff2779b568e70822e0ef2cc7afeeefbe7c607652 (patch)
treeb14a77664e9d4c8284805c5691017245e6c35e4b /include/linux/ata.h
parent4b58f17d7c45a8e5f4acda641bec388398b9c0fa (diff)
downloadop-kernel-dev-ff2779b568e70822e0ef2cc7afeeefbe7c607652.zip
op-kernel-dev-ff2779b568e70822e0ef2cc7afeeefbe7c607652.tar.gz
ide: ide_id_has_flush_cache_ext() -> ata_id_flush_ext_enabled()
* Add ata_id_flush_ext_enabled() inline helper to <linux/ata.h>. * ide_id_has_flush_cache_ext() -> ata_id_flush_ext_enabled() The latter one also checks if the command is marked as supported in word 83 and validity of words 83 & 86. Cc: Jeff Garzik <jgarzik@pobox.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Diffstat (limited to 'include/linux/ata.h')
-rw-r--r--include/linux/ata.h13
1 files changed, 13 insertions, 0 deletions
diff --git a/include/linux/ata.h b/include/linux/ata.h
index 921cf0f..81d9ade 100644
--- a/include/linux/ata.h
+++ b/include/linux/ata.h
@@ -574,6 +574,19 @@ static inline int ata_id_has_flush_ext(const u16 *id)
return id[ATA_ID_COMMAND_SET_2] & (1 << 13);
}
+static inline int ata_id_flush_ext_enabled(const u16 *id)
+{
+ if (ata_id_has_flush_ext(id) == 0)
+ return 0;
+ if ((id[ATA_ID_CSF_DEFAULT] & 0xC000) != 0x4000)
+ return 0;
+ /*
+ * some Maxtor disks have bit 13 defined incorrectly
+ * so check bit 10 too
+ */
+ return (id[ATA_ID_CFS_ENABLE_2] & 0x2400) == 0x2400;
+}
+
static inline int ata_id_has_lba48(const u16 *id)
{
if ((id[ATA_ID_COMMAND_SET_2] & 0xC000) != 0x4000)
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