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libata: Cleanup ata_read_log_page() 

The warning message "READ LOG DMA EXT failed, trying unqueued" in
ata_read_log_page() as well as the macro name ATA_HORKAGE_NO_NCQ_LOG
are confusing: the command READ LOG DMA EXT is not an queued NCQ command
unless it is encapsulated in a RECEIVE FPDMA QUEUED command.
From ACS-4 READ LOG DMA EXT description:

"The device processes the READ LOG DMA EXT command in the NCQ feature
set environment (see 4.13.6) if the READ LOG DMA EXT command is
encapsulated in a RECEIVE FPDMA QUEUED command (see 7.30) with the
inputs encapsulated as shown in 7.23.6."

To avoid confusion, fix the warning messsage to mention switching to PIO and
not "unqueued" and rename the macro ATA_HORKAGE_NO_NCQ_LOG to
ATA_HORKAGE_NO_DMA_LOG.

Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Damien Le Moal 2017-07-10 14:45:20 +09:00 committed by Tejun Heo
parent accd04738f
commit 7cfdfdc82a
2 changed files with 4 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/ata/libata-core.c
View File

@ -2083,7 +2083,7 @@ unsigned int ata_read_log_page(struct ata_device *dev, u8 log,
retry:
ata_tf_init(dev, &tf);
if (dev->dma_mode && ata_id_has_read_log_dma_ext(dev->id) &&
!(dev->horkage & ATA_HORKAGE_NO_NCQ_LOG)) {
!(dev->horkage & ATA_HORKAGE_NO_DMA_LOG)) {
tf.command = ATA_CMD_READ_LOG_DMA_EXT;
tf.protocol = ATA_PROT_DMA;
dma = true;
@ -2102,8 +2102,8 @@ retry:
buf, sectors * ATA_SECT_SIZE, 0);
if (err_mask && dma) {
dev->horkage |= ATA_HORKAGE_NO_NCQ_LOG;
ata_dev_warn(dev, "READ LOG DMA EXT failed, trying unqueued\n");
dev->horkage |= ATA_HORKAGE_NO_DMA_LOG;
ata_dev_warn(dev, "READ LOG DMA EXT failed, trying PIO\n");
goto retry;
}

2
include/linux/libata.h
View File

@ -435,7 +435,7 @@ enum {
ATA_HORKAGE_NOLPM = (1 << 20), /* don't use LPM */
ATA_HORKAGE_WD_BROKEN_LPM = (1 << 21), /* some WDs have broken LPM */
ATA_HORKAGE_ZERO_AFTER_TRIM = (1 << 22),/* guarantees zero after trim */
ATA_HORKAGE_NO_NCQ_LOG = (1 << 23), /* don't use NCQ for log read */
ATA_HORKAGE_NO_DMA_LOG = (1 << 23), /* don't use DMA for log read */
ATA_HORKAGE_NOTRIM = (1 << 24), /* don't use TRIM */
ATA_HORKAGE_MAX_SEC_1024 = (1 << 25), /* Limit max sects to 1024 */