diff options
| -rw-r--r-- | drivers/ata/libata-core.c | 16 | ||||
| -rw-r--r-- | include/linux/libata.h | 1 |
2 files changed, 5 insertions, 12 deletions
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index c5592f6a819..6b922365d5e 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -4704,9 +4704,8 @@ void swap_buf_le16(u16 *buf, unsigned int buf_words) static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap) { struct ata_queued_cmd *qc = NULL; - unsigned int i, tag, max_queue; - - max_queue = ap->scsi_host->can_queue; + unsigned int max_queue = ap->host->n_tags; + unsigned int i, tag; /* no command while frozen */ if (unlikely(ap->pflags & ATA_PFLAG_FROZEN)) @@ -5965,6 +5964,7 @@ void ata_host_init(struct ata_host *host, struct device *dev, { spin_lock_init(&host->lock); mutex_init(&host->eh_mutex); + host->n_tags = ATA_MAX_QUEUE - 1; host->dev = dev; host->flags = flags; host->ops = ops; @@ -6047,15 +6047,7 @@ int ata_host_register(struct ata_host *host, struct scsi_host_template *sht) { int i, rc; - /* - * The max queue supported by hardware must not be greater than - * ATA_MAX_QUEUE. - */ - if (sht->can_queue > ATA_MAX_QUEUE) { - dev_err(host->dev, "BUG: the hardware max queue is too large\n"); - WARN_ON(1); - return -EINVAL; - } + host->n_tags = clamp(sht->can_queue, 1, ATA_MAX_QUEUE - 1); /* host must have been started */ if (!(host->flags & ATA_HOST_STARTED)) { diff --git a/include/linux/libata.h b/include/linux/libata.h index 50d7cb1ee94..dd16deb27dd 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -539,6 +539,7 @@ struct ata_host { struct device *dev; void __iomem * const *iomap; unsigned int n_ports; + unsigned int n_tags; /* nr of NCQ tags */ void *private_data; struct ata_port_operations *ops; unsigned long flags; |