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libata: use READ_LOG_DMA_EXT

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If READ_LOG_DMA_EXT is supported we should try to use it for
reading the log pages.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Hannes Reinecke 2015-03-27 16:46:30 +01:00 • committed by Tejun Heo
parent 3a02824396
commit 9faa643855
2 changed files with 14 additions and 2 deletions
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7
include/linux/ata.h
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@ -696,6 +696,13 @@ static inline bool ata_id_wcache_enabled(const u16 *id)
return id[ATA_ID_CFS_ENABLE_1] & (1 << 5);
}
static inline bool ata_id_has_read_log_dma_ext(const u16 *id)
{
if (!(id[ATA_ID_CFS_ENABLE_2] & (1 << 15)))
return false;
return id[ATA_ID_COMMAND_SET_3] & (1 << 3);
}
/**
* ata_id_major_version - get ATA level of drive
* @id: Identify data