diff options
| author | Hannes Reinecke <hare@suse.de> | 2014-11-24 17:37:20 +0300 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2014-11-24 18:10:23 +0300 |
| commit | 3707a186c8970e3c4f3c8d9ccf4230b8657e919f (patch) | |
| tree | cacc0aaabc663d438b1944f06e52d58b5cb56684 | |
| parent | a87bf29362c763cf35faa17154b699471a8b902e (diff) | |
| download | linux-3707a186c8970e3c4f3c8d9ccf4230b8657e919f.tar.xz | |
esp_scsi: make number of tags configurable
Add a field 'num_tags' to the esp structure to allow drivers
to overwrite the number of avialable tags if required.
Default is ESP_DEFAULT_TAGS.
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
| -rw-r--r-- | drivers/scsi/esp_scsi.c | 12 | ||||
| -rw-r--r-- | drivers/scsi/esp_scsi.h | 3 |
2 files changed, 7 insertions, 8 deletions
diff --git a/drivers/scsi/esp_scsi.c b/drivers/scsi/esp_scsi.c index 7e7687f73deb..57ccb147b22b 100644 --- a/drivers/scsi/esp_scsi.c +++ b/drivers/scsi/esp_scsi.c @@ -2317,6 +2317,10 @@ int scsi_esp_register(struct esp *esp, struct device *dev) static int instance; int err; + if (!esp->num_tags) + esp->num_tags = ESP_DEFAULT_TAGS; + else if (esp->num_tags >= ESP_MAX_TAG) + esp->num_tags = ESP_MAX_TAG - 1; esp->host->transportt = esp_transport_template; esp->host->max_lun = ESP_MAX_LUN; esp->host->cmd_per_lun = 2; @@ -2403,12 +2407,8 @@ static int esp_slave_configure(struct scsi_device *dev) struct esp *esp = shost_priv(dev->host); struct esp_target_data *tp = &esp->target[dev->id]; - if (dev->tagged_supported) { - /* XXX make this configurable somehow XXX */ - int goal_tags = min(ESP_DEFAULT_TAGS, ESP_MAX_TAG); - - scsi_change_queue_depth(dev, goal_tags); - } + if (dev->tagged_supported) + scsi_change_queue_depth(dev, esp->num_tags); tp->flags |= ESP_TGT_DISCONNECT; diff --git a/drivers/scsi/esp_scsi.h b/drivers/scsi/esp_scsi.h index b5862e463455..975d2934d42a 100644 --- a/drivers/scsi/esp_scsi.h +++ b/drivers/scsi/esp_scsi.h @@ -283,7 +283,6 @@ struct esp_cmd_entry { struct completion *eh_done; }; -/* XXX make this configurable somehow XXX */ #define ESP_DEFAULT_TAGS 16 #define ESP_MAX_TARGET 16 @@ -445,7 +444,7 @@ struct esp { u8 prev_soff; u8 prev_stp; u8 prev_cfg3; - u8 __pad; + u8 num_tags; struct list_head esp_cmd_pool; |