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libata: add ATA_HORKAGE_NOTRIM 

Some devices lose data on TRIM whether queued or not.  This patch adds
a horkage to disable TRIM.

tj: Collapsed unnecessary if() nesting.

Signed-off-by: Arne Fitzenreiter <arne_f@ipfire.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: stable@vger.kernel.org
This commit is contained in:
Arne Fitzenreiter 2015-07-15 13:54:36 +02:00 committed by Tejun Heo
parent 08c85d2a59
commit 71d126fd28
3 changed files with 6 additions and 1 deletions
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3
drivers/ata/libata-scsi.c
View File

@ -2568,7 +2568,8 @@ static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf)
rbuf[14] = (lowest_aligned >> 8) & 0x3f;
rbuf[15] = lowest_aligned;
if (ata_id_has_trim(args->id)) {
if (ata_id_has_trim(args->id) &&
!(dev->horkage & ATA_HORKAGE_NOTRIM)) {
rbuf[14] |= 0x80; /* LBPME */
if (ata_id_has_zero_after_trim(args->id) &&

2
drivers/ata/libata-transport.c
View File

@ -569,6 +569,8 @@ show_ata_dev_trim(struct device *dev,
if (!ata_id_has_trim(ata_dev->id))
mode = "unsupported";
else if (ata_dev->horkage & ATA_HORKAGE_NOTRIM)
mode = "forced_unsupported";
else if (ata_dev->horkage & ATA_HORKAGE_NO_NCQ_TRIM)
mode = "forced_unqueued";
else if (ata_fpdma_dsm_supported(ata_dev))

2
include/linux/libata.h
View File

@ -431,6 +431,8 @@ enum {
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_NOTRIM = (1 << 24), /* don't use TRIM */
/* DMA mask for user DMA control: User visible values; DO NOT
renumber */