};
#undef SP
-static struct kmem_cache *scsi_bidi_sdb_cache;
+static struct kmem_cache *scsi_sdb_cache;
static void scsi_run_queue(struct request_queue *q);
struct scsi_data_buffer *bidi_sdb =
cmd->request->next_rq->special;
scsi_free_sgtable(bidi_sdb);
- kmem_cache_free(scsi_bidi_sdb_cache, bidi_sdb);
+ kmem_cache_free(scsi_sdb_cache, bidi_sdb);
cmd->request->next_rq->special = NULL;
}
}
if (blk_bidi_rq(cmd->request)) {
struct scsi_data_buffer *bidi_sdb = kmem_cache_zalloc(
- scsi_bidi_sdb_cache, GFP_ATOMIC);
+ scsi_sdb_cache, GFP_ATOMIC);
if (!bidi_sdb) {
error = BLKPREP_DEFER;
goto err_exit;
if (ret != BLKPREP_OK)
return ret;
+
+ if (unlikely(sdev->scsi_dh_data && sdev->scsi_dh_data->scsi_dh
+ && sdev->scsi_dh_data->scsi_dh->prep_fn)) {
+ ret = sdev->scsi_dh_data->scsi_dh->prep_fn(sdev, req);
+ if (ret != BLKPREP_OK)
+ return ret;
+ }
+
/*
* Filesystem requests must transfer data.
*/
printk("scsi%d unblocking host at zero depth\n",
shost->host_no));
} else {
- blk_plug_device(q);
return 0;
}
}
}
spin_lock(shost->host_lock);
+ /*
+ * We hit this when the driver is using a host wide
+ * tag map. For device level tag maps the queue_depth check
+ * in the device ready fn would prevent us from trying
+ * to allocate a tag. Since the map is a shared host resource
+ * we add the dev to the starved list so it eventually gets
+ * a run when a tag is freed.
+ */
+ if (blk_queue_tagged(q) && (req->tag == -1)) {
+ if (list_empty(&sdev->starved_entry))
+ list_add_tail(&sdev->starved_entry,
+ &shost->starved_list);
+ goto not_ready;
+ }
+
if (!scsi_host_queue_ready(q, shost, sdev))
goto not_ready;
if (scsi_target(sdev)->single_lun) {
return -ENOMEM;
}
- scsi_bidi_sdb_cache = kmem_cache_create("scsi_bidi_sdb",
- sizeof(struct scsi_data_buffer),
- 0, 0, NULL);
- if (!scsi_bidi_sdb_cache) {
- printk(KERN_ERR "SCSI: can't init scsi bidi sdb cache\n");
+ scsi_sdb_cache = kmem_cache_create("scsi_data_buffer",
+ sizeof(struct scsi_data_buffer),
+ 0, 0, NULL);
+ if (!scsi_sdb_cache) {
+ printk(KERN_ERR "SCSI: can't init scsi sdb cache\n");
goto cleanup_io_context;
}
if (!sgp->slab) {
printk(KERN_ERR "SCSI: can't init sg slab %s\n",
sgp->name);
- goto cleanup_bidi_sdb;
+ goto cleanup_sdb;
}
sgp->pool = mempool_create_slab_pool(SG_MEMPOOL_SIZE,
if (!sgp->pool) {
printk(KERN_ERR "SCSI: can't init sg mempool %s\n",
sgp->name);
- goto cleanup_bidi_sdb;
+ goto cleanup_sdb;
}
}
return 0;
-cleanup_bidi_sdb:
+cleanup_sdb:
for (i = 0; i < SG_MEMPOOL_NR; i++) {
struct scsi_host_sg_pool *sgp = scsi_sg_pools + i;
if (sgp->pool)
if (sgp->slab)
kmem_cache_destroy(sgp->slab);
}
- kmem_cache_destroy(scsi_bidi_sdb_cache);
+ kmem_cache_destroy(scsi_sdb_cache);
cleanup_io_context:
kmem_cache_destroy(scsi_io_context_cache);
int i;
kmem_cache_destroy(scsi_io_context_cache);
- kmem_cache_destroy(scsi_bidi_sdb_cache);
+ kmem_cache_destroy(scsi_sdb_cache);
for (i = 0; i < SG_MEMPOOL_NR; i++) {
struct scsi_host_sg_pool *sgp = scsi_sg_pools + i;