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authorTom Yan <tom.ty89@gmail.com>2016-07-13 04:31:23 +0800
committerTejun Heo <tj@kernel.org>2016-07-12 16:37:17 -0400
commit2983860c766870b701c4a34f435c1e18db086244 (patch)
treec9c084dc70f54fd860baead437e37f3e1ae9844b /drivers/ata/libata-scsi.c
parent5c79097a28c2525740dd9e4470676ec9d25bee45 (diff)
libata-scsi: avoid repeated calculation of number of TRIM ranges
Currently libata statically allows only 1-block (512-byte) payload for each TRIM command. Each payload can carry 64 TRIM ranges since each range requires 8 bytes. It is silly to keep doing the calculation (512 / 8) in different places. Hence, define the new ATA_MAX_TRIM_RNUM for the result. Signed-off-by: Tom Yan <tom.ty89@gmail.com> Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'drivers/ata/libata-scsi.c')
-rw-r--r--drivers/ata/libata-scsi.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index b0ca32228d3f..3dca0d15c469 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -2319,7 +2319,7 @@ static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf)
* with the unmap bit set.
*/
if (ata_id_has_trim(args->id)) {
- put_unaligned_be64(65535 * 512 / 8, &rbuf[36]);
+ put_unaligned_be64(65535 * ATA_MAX_TRIM_RNUM, &rbuf[36]);
put_unaligned_be32(1, &rbuf[28]);
}
@@ -3311,8 +3311,8 @@ static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc)
buf = page_address(sg_page(scsi_sglist(scmd)));
- if (n_block <= 65535 * 512 / 8) {
- size = ata_set_lba_range_entries(buf, 512, block, n_block);
+ if (n_block <= 65535 * ATA_MAX_TRIM_RNUM) {
+ size = ata_set_lba_range_entries(buf, ATA_MAX_TRIM_RNUM, block, n_block);
} else {
fp = 2;
goto invalid_fld;