libata: Support chips with 64K PRD quirk

Add ata_dumb_qc_prep and supporting logic so that a driver can just
specify it needs to be helped in this area. 64K entries are split
as with drivers/ide.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/ata/pata_cs5520.c b/drivers/ata/pata_cs5520.c
index 00cf0134079c..6bf037d82b5a 100644
--- a/drivers/ata/pata_cs5520.c
+++ b/drivers/ata/pata_cs5520.c
@@ -146,7 +146,7 @@ static struct scsi_host_template cs5520_sht = {
         .queuecommand           = ata_scsi_queuecmd,
         .can_queue              = ATA_DEF_QUEUE,
         .this_id                = ATA_SHT_THIS_ID,
-        .sg_tablesize           = LIBATA_MAX_PRD,
+        .sg_tablesize           = LIBATA_DUMB_MAX_PRD,
         .cmd_per_lun            = ATA_SHT_CMD_PER_LUN,
         .emulated               = ATA_SHT_EMULATED,
         .use_clustering         = ATA_SHT_USE_CLUSTERING,
@@ -178,7 +178,7 @@ static struct ata_port_operations cs5520_port_ops = {
         .bmdma_start            = ata_bmdma_start,
         .bmdma_stop             = ata_bmdma_stop,
         .bmdma_status           = ata_bmdma_status,
-        .qc_prep                = ata_qc_prep,
+        .qc_prep                = ata_dumb_qc_prep,
         .qc_issue               = ata_qc_issue_prot,
         .data_xfer              = ata_data_xfer,