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Subject[PATCH 3/3] ide: ide_id_has_flush_cache_ext() -> ata_id_flush_ext_enabled()
Date
* 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>
---
drivers/ide/ide-disk.c | 6 +++---
drivers/ide/ide-io.c | 2 +-
include/linux/ata.h | 13 +++++++++++++
include/linux/ide.h | 4 ----
4 files changed, 17 insertions(+), 8 deletions(-)
Index: b/drivers/ide/ide-disk.c
===================================================================
--- a/drivers/ide/ide-disk.c
+++ b/drivers/ide/ide-disk.c
@@ -582,7 +582,7 @@ static void idedisk_prepare_flush(struct
BUG_ON(task == NULL);

memset(task, 0, sizeof(*task));
- if (ide_id_has_flush_cache_ext(drive->id) &&
+ if (ata_id_flush_ext_enabled(drive->id) &&
(drive->capacity64 >= (1UL << 28)))
task->tf.command = ATA_CMD_FLUSH_EXT;
else
@@ -659,7 +659,7 @@ static void update_ordered(ide_drive_t *
capacity = idedisk_capacity(drive);
barrier = ata_id_flush_enabled(id) && !drive->noflush &&
(drive->addressing == 0 || capacity <= (1ULL << 28) ||
- ide_id_has_flush_cache_ext(id));
+ ata_id_flush_ext_enabled(id));

printk(KERN_INFO "%s: cache flushes %ssupported\n",
drive->name, barrier ? "" : "not ");
@@ -705,7 +705,7 @@ static int do_idedisk_flushcache(ide_dri
ide_task_t args;

memset(&args, 0, sizeof(ide_task_t));
- if (ide_id_has_flush_cache_ext(drive->id))
+ if (ata_id_flush_ext_enabled(drive->id))
args.tf.command = ATA_CMD_FLUSH_EXT;
else
args.tf.command = ATA_CMD_FLUSH;
Index: b/drivers/ide/ide-io.c
===================================================================
--- a/drivers/ide/ide-io.c
+++ b/drivers/ide/ide-io.c
@@ -188,7 +188,7 @@ static ide_startstop_t ide_start_power_s
ide_complete_power_step(drive, rq, 0, 0);
return ide_stopped;
}
- if (ide_id_has_flush_cache_ext(drive->id))
+ if (ata_id_flush_ext_enabled(drive->id))
args->tf.command = ATA_CMD_FLUSH_EXT;
else
args->tf.command = ATA_CMD_FLUSH;
Index: b/include/linux/ata.h
===================================================================
--- a/include/linux/ata.h
+++ b/include/linux/ata.h
@@ -573,6 +573,19 @@ static inline int ata_id_has_flush_ext(c
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)
Index: b/include/linux/ide.h
===================================================================
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -1451,10 +1451,6 @@ extern struct mutex ide_cfg_mtx;
extern struct bus_type ide_bus_type;
extern struct class *ide_port_class;

-/* some Maxtor disks have bit 13 defined incorrectly so check bit 10 too */
-#define ide_id_has_flush_cache_ext(id) \
- (((id)[ATA_ID_CFS_ENABLE_2] & 0x2400) == 0x2400)
-
static inline void ide_dump_identify(u8 *id)
{
print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, 16, 2, id, 512, 0);

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