Commit baf14aa1 authored by Jeff Garzik's avatar Jeff Garzik Committed by Linus Torvalds

sata_mv: correct S/G table limits

The recent mv_fill_sg() rewrite, to fix a data corruption problem
related to IOMMU virtual merging, forgot to account for the
potentially-increased size of the scatter/gather table after its run.

Additionally, the DMA boundary is reduced from 0xffffffff to 0xffff
to more closely match the needs of mv_fill_sg().
Signed-off-by: default avatarJeff Garzik <jgarzik@redhat.com>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent e2a57a81
......@@ -313,7 +313,10 @@ enum {
#define IS_GEN_IIE(hpriv) ((hpriv)->hp_flags & MV_HP_GEN_IIE)
enum {
MV_DMA_BOUNDARY = 0xffffffffU,
/* DMA boundary 0xffff is required by the s/g splitting
* we need on /length/ in mv_fill-sg().
*/
MV_DMA_BOUNDARY = 0xffffU,
/* mask of register bits containing lower 32 bits
* of EDMA request queue DMA address
......@@ -448,7 +451,7 @@ static struct scsi_host_template mv5_sht = {
.queuecommand = ata_scsi_queuecmd,
.can_queue = ATA_DEF_QUEUE,
.this_id = ATA_SHT_THIS_ID,
.sg_tablesize = MV_MAX_SG_CT,
.sg_tablesize = MV_MAX_SG_CT / 2,
.cmd_per_lun = ATA_SHT_CMD_PER_LUN,
.emulated = ATA_SHT_EMULATED,
.use_clustering = 1,
......@@ -466,7 +469,7 @@ static struct scsi_host_template mv6_sht = {
.queuecommand = ata_scsi_queuecmd,
.can_queue = ATA_DEF_QUEUE,
.this_id = ATA_SHT_THIS_ID,
.sg_tablesize = MV_MAX_SG_CT,
.sg_tablesize = MV_MAX_SG_CT / 2,
.cmd_per_lun = ATA_SHT_CMD_PER_LUN,
.emulated = ATA_SHT_EMULATED,
.use_clustering = 1,
......
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