[PATCH] libata: add per-device max_sectors
If a low level driver wants to control max_sectors, it had to adjust
ap->host->max_sectors and set ATA_DFLAG_LOCK_SECTORS to tell
ata_scsi_slave_config not to override the limit. This is not only
cumbersome but also incorrect for hosts which support more than one
devices per port.
This patch adds per-device ->max_sectors. If the field is unset
(zero), libata core layer will adjust ->max_sectors according to
default rules. If the field is set, libata honors the setting.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c
index 1a373b4..61cba39 100644
--- a/drivers/scsi/libata-core.c
+++ b/drivers/scsi/libata-core.c
@@ -1147,9 +1147,7 @@
printk(KERN_INFO "ata%u(%u): applying bridge limits\n",
ap->id, i);
ap->udma_mask &= ATA_UDMA5;
- ap->host->max_sectors = ATA_MAX_SECTORS;
- ap->host->hostt->max_sectors = ATA_MAX_SECTORS;
- ap->device[i].flags |= ATA_DFLAG_LOCK_SECTORS;
+ ap->device[i].max_sectors = ATA_MAX_SECTORS;
}
if (ap->ops->dev_config)