libata: implement and use SHT initializers

libata lets low level drivers build scsi_host_template and register it
to the SCSI layer.  This allows low level drivers high level of
flexibility but also burdens them with lots of boilerplate entries.

This patch implements SHT initializers which can be used to initialize
all the boilerplate entries in a sht.  Three variants of them are
implemented - BASE, BMDMA and NCQ - for different types of drivers.
Note that entries can be overriden by putting individual initializers
after the helper macro.

All sht tables are identical before and after this patch.

Signed-off-by: Tejun Heo <htejun@gmail.com>

1 files changed, 1 insertions, 14 deletions

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index c6ea44a7f2a9..8862595cb2cf 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -62,7 +62,6 @@ enum {
         AHCI_MAX_PORTS          = 32,
         AHCI_MAX_SG             = 168, /* hardware max is 64K */
         AHCI_DMA_BOUNDARY       = 0xffffffff,
-        AHCI_USE_CLUSTERING     = 1,
         AHCI_MAX_CMDS           = 32,
         AHCI_CMD_SZ             = 32,
         AHCI_CMD_SLOT_SZ        = AHCI_MAX_CMDS * AHCI_CMD_SZ,
@@ -274,22 +273,10 @@ static struct class_device_attribute *ahci_shost_attrs[] = {
 };
 
 static struct scsi_host_template ahci_sht = {
-        .module                 = THIS_MODULE,
-        .name                   = DRV_NAME,
-        .ioctl                  = ata_scsi_ioctl,
-        .queuecommand           = ata_scsi_queuecmd,
-        .change_queue_depth     = ata_scsi_change_queue_depth,
+        ATA_NCQ_SHT(DRV_NAME),
         .can_queue              = AHCI_MAX_CMDS - 1,
-        .this_id                = ATA_SHT_THIS_ID,
         .sg_tablesize           = AHCI_MAX_SG,
-        .cmd_per_lun            = ATA_SHT_CMD_PER_LUN,
-        .emulated               = ATA_SHT_EMULATED,
-        .use_clustering         = AHCI_USE_CLUSTERING,
-        .proc_name              = DRV_NAME,
         .dma_boundary           = AHCI_DMA_BOUNDARY,
-        .slave_configure        = ata_scsi_slave_config,
-        .slave_destroy          = ata_scsi_slave_destroy,
-        .bios_param             = ata_std_bios_param,
         .shost_attrs            = ahci_shost_attrs,
 };