Commit 7ceea41b authored by Arne Fitzenreiter's avatar Arne Fitzenreiter Committed by Ben Hutchings

libata: add ATA_HORKAGE_NOTRIM

commit 71d126fd upstream.

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: default avatarArne Fitzenreiter <arne_f@ipfire.org>
Signed-off-by: default avatarTejun Heo <tj@kernel.org>
[bwh: Backported to 3.2:
 - Adjust context
 - Drop change to show_ata_dev_trim()]
Signed-off-by: default avatarBen Hutchings <ben@decadent.org.uk>
parent 3d27f59a
......@@ -2473,7 +2473,8 @@ 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; /* TPE */
if (ata_id_has_zero_after_trim(args->id))
......
......@@ -403,6 +403,8 @@ enum {
ATA_HORKAGE_MAX_SEC_LBA48 = (1 << 17), /* Set max sects to 65535 */
ATA_HORKAGE_NOLPM = (1 << 20), /* don't use LPM */
ATA_HORKAGE_WD_BROKEN_LPM = (1 << 21), /* some WDs have broken LPM */
ATA_HORKAGE_NOTRIM = (1 << 24), /* don't use TRIM */
/* DMA mask for user DMA control: User visible values; DO NOT
renumber */
......
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