| From 71d126fd28de2d4d9b7b2088dbccd7ca62fad6e0 Mon Sep 17 00:00:00 2001 |
| From: Arne Fitzenreiter <arne_f@ipfire.org> |
| Date: Wed, 15 Jul 2015 13:54:36 +0200 |
| Subject: libata: add ATA_HORKAGE_NOTRIM |
| |
| From: Arne Fitzenreiter <arne_f@ipfire.org> |
| |
| commit 71d126fd28de2d4d9b7b2088dbccd7ca62fad6e0 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: Arne Fitzenreiter <arne_f@ipfire.org> |
| Signed-off-by: Tejun Heo <tj@kernel.org> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| |
| |
| --- |
| drivers/ata/libata-scsi.c | 3 ++- |
| include/linux/libata.h | 1 + |
| 2 files changed, 3 insertions(+), 1 deletion(-) |
| |
| --- a/drivers/ata/libata-scsi.c |
| +++ b/drivers/ata/libata-scsi.c |
| @@ -2512,7 +2512,8 @@ static unsigned int ata_scsiop_read_cap( |
| 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)) |
| --- a/include/linux/libata.h |
| +++ b/include/linux/libata.h |
| @@ -409,6 +409,7 @@ enum { |
| ATA_HORKAGE_ATAPI_DMADIR = (1 << 18), /* device requires dmadir */ |
| 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 */ |
