From e6d902a3bfd53da375588e498251f4f4f6cd9650 Mon Sep 17 00:00:00 2001 From: Brian King Date: Wed, 28 Jun 2006 08:30:31 -0500 Subject: [PATCH] libata: Conditionally set host->max_cmd_len In preparation for SAS attached SATA devices, which will not have a libata scsi_host, only setup host->max_cmd_len if ap->host exists. Signed-off-by: Brian King Signed-off-by: Jeff Garzik --- drivers/scsi/libata-core.c | 21 +++++++++++++++------ 1 file changed, 15 insertions(+), 6 deletions(-) (limited to 'drivers/scsi') diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c index 1c960ac1617..fd0e6cc0619 100644 --- a/drivers/scsi/libata-core.c +++ b/drivers/scsi/libata-core.c @@ -1325,6 +1325,19 @@ static void ata_dev_config_ncq(struct ata_device *dev, snprintf(desc, desc_sz, "NCQ (depth %d/%d)", hdepth, ddepth); } +static void ata_set_port_max_cmd_len(struct ata_port *ap) +{ + int i; + + if (ap->host) { + ap->host->max_cmd_len = 0; + for (i = 0; i < ATA_MAX_DEVICES; i++) + ap->host->max_cmd_len = max_t(unsigned int, + ap->host->max_cmd_len, + ap->device[i].cdb_len); + } +} + /** * ata_dev_configure - Configure the specified ATA/ATAPI device * @dev: Target device to configure @@ -1344,7 +1357,7 @@ int ata_dev_configure(struct ata_device *dev, int print_info) struct ata_port *ap = dev->ap; const u16 *id = dev->id; unsigned int xfer_mask; - int i, rc; + int rc; if (!ata_dev_enabled(dev) && ata_msg_info(ap)) { ata_dev_printk(dev, KERN_INFO, @@ -1474,11 +1487,7 @@ int ata_dev_configure(struct ata_device *dev, int print_info) cdb_intr_string); } - ap->host->max_cmd_len = 0; - for (i = 0; i < ATA_MAX_DEVICES; i++) - ap->host->max_cmd_len = max_t(unsigned int, - ap->host->max_cmd_len, - ap->device[i].cdb_len); + ata_set_port_max_cmd_len(ap); /* limit bridge transfers to udma5, 200 sectors */ if (ata_dev_knobble(dev)) { -- cgit v1.2.3