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Commit 9faa6438 authored by Hannes Reinecke's avatar Hannes Reinecke Committed by Tejun Heo
Browse files

libata: use READ_LOG_DMA_EXT 



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

Signed-off-by: default avatarHannes Reinecke <hare@suse.de>
Signed-off-by: default avatarTejun Heo <tj@kernel.org>
parent 3a028243

drivers/ata/libata-eh.c

+7 −2
Original line number Diff line number Diff line
@@ -1510,13 +1510,18 @@ unsigned int ata_read_log_page(struct ata_device *dev, u8 log, 
	DPRINTK("read log page - log 0x%x, page 0x%x\n", log, page);



	ata_tf_init(dev, &tf);

	if (dev->dma_mode && ata_id_has_read_log_dma_ext(dev->id)) {

		tf.command = ATA_CMD_READ_LOG_DMA_EXT;

		tf.protocol = ATA_PROT_DMA;

	} else {

		tf.command = ATA_CMD_READ_LOG_EXT;

		tf.protocol = ATA_PROT_PIO;

	}

	tf.lbal = log;

	tf.lbam = page;

	tf.nsect = sectors;

	tf.hob_nsect = sectors >> 8;

	tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_LBA48 | ATA_TFLAG_DEVICE;

	tf.protocol = ATA_PROT_PIO;



	err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE,

				     buf, sectors * ATA_SECT_SIZE, 0);

include/linux/ata.h

+7 −0
Original line number Diff line number Diff line
@@ -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