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path: root/drivers/scsi/hosts.c
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Diffstat (limited to 'drivers/scsi/hosts.c')
-rw-r--r--drivers/scsi/hosts.c50
1 files changed, 38 insertions, 12 deletions
diff --git a/drivers/scsi/hosts.c b/drivers/scsi/hosts.c
index 3cbb57a8b846..6de80e352871 100644
--- a/drivers/scsi/hosts.c
+++ b/drivers/scsi/hosts.c
@@ -204,18 +204,33 @@ int scsi_add_host_with_dma(struct Scsi_Host *shost, struct device *dev,
struct scsi_host_template *sht = shost->hostt;
int error = -EINVAL;
- printk(KERN_INFO "scsi%d : %s\n", shost->host_no,
+ shost_printk(KERN_INFO, shost, "%s\n",
sht->info ? sht->info(shost) : sht->name);
if (!shost->can_queue) {
- printk(KERN_ERR "%s: can_queue = 0 no longer supported\n",
- sht->name);
+ shost_printk(KERN_ERR, shost,
+ "can_queue = 0 no longer supported\n");
goto fail;
}
+ if (shost_use_blk_mq(shost)) {
+ error = scsi_mq_setup_tags(shost);
+ if (error)
+ goto fail;
+ }
+
+ /*
+ * Note that we allocate the freelist even for the MQ case for now,
+ * as we need a command set aside for scsi_reset_provider. Having
+ * the full host freelist and one command available for that is a
+ * little heavy-handed, but avoids introducing a special allocator
+ * just for this. Eventually the structure of scsi_reset_provider
+ * will need a major overhaul.
+ */
error = scsi_setup_command_freelist(shost);
if (error)
- goto fail;
+ goto out_destroy_tags;
+
if (!shost->shost_gendev.parent)
shost->shost_gendev.parent = dev ? dev : &platform_bus;
@@ -226,7 +241,7 @@ int scsi_add_host_with_dma(struct Scsi_Host *shost, struct device *dev,
error = device_add(&shost->shost_gendev);
if (error)
- goto out;
+ goto out_destroy_freelist;
pm_runtime_set_active(&shost->shost_gendev);
pm_runtime_enable(&shost->shost_gendev);
@@ -279,8 +294,11 @@ int scsi_add_host_with_dma(struct Scsi_Host *shost, struct device *dev,
device_del(&shost->shost_dev);
out_del_gendev:
device_del(&shost->shost_gendev);
- out:
+ out_destroy_freelist:
scsi_destroy_command_freelist(shost);
+ out_destroy_tags:
+ if (shost_use_blk_mq(shost))
+ scsi_mq_destroy_tags(shost);
fail:
return error;
}
@@ -309,8 +327,13 @@ static void scsi_host_dev_release(struct device *dev)
}
scsi_destroy_command_freelist(shost);
- if (shost->bqt)
- blk_free_tags(shost->bqt);
+ if (shost_use_blk_mq(shost)) {
+ if (shost->tag_set.tags)
+ scsi_mq_destroy_tags(shost);
+ } else {
+ if (shost->bqt)
+ blk_free_tags(shost->bqt);
+ }
kfree(shost->shost_data);
@@ -436,6 +459,8 @@ struct Scsi_Host *scsi_host_alloc(struct scsi_host_template *sht, int privsize)
else
shost->dma_boundary = 0xffffffff;
+ shost->use_blk_mq = scsi_use_blk_mq && !shost->hostt->disable_blk_mq;
+
device_initialize(&shost->shost_gendev);
dev_set_name(&shost->shost_gendev, "host%d", shost->host_no);
shost->shost_gendev.bus = &scsi_bus_type;
@@ -450,8 +475,9 @@ struct Scsi_Host *scsi_host_alloc(struct scsi_host_template *sht, int privsize)
shost->ehandler = kthread_run(scsi_error_handler, shost,
"scsi_eh_%d", shost->host_no);
if (IS_ERR(shost->ehandler)) {
- printk(KERN_WARNING "scsi%d: error handler thread failed to spawn, error = %ld\n",
- shost->host_no, PTR_ERR(shost->ehandler));
+ shost_printk(KERN_WARNING, shost,
+ "error handler thread failed to spawn, error = %ld\n",
+ PTR_ERR(shost->ehandler));
goto fail_kfree;
}
@@ -584,7 +610,7 @@ EXPORT_SYMBOL(scsi_is_host_device);
int scsi_queue_work(struct Scsi_Host *shost, struct work_struct *work)
{
if (unlikely(!shost->work_q)) {
- printk(KERN_ERR
+ shost_printk(KERN_ERR, shost,
"ERROR: Scsi host '%s' attempted to queue scsi-work, "
"when no workqueue created.\n", shost->hostt->name);
dump_stack();
@@ -603,7 +629,7 @@ EXPORT_SYMBOL_GPL(scsi_queue_work);
void scsi_flush_work(struct Scsi_Host *shost)
{
if (!shost->work_q) {
- printk(KERN_ERR
+ shost_printk(KERN_ERR, shost,
"ERROR: Scsi host '%s' attempted to flush scsi-work, "
"when no workqueue created.\n", shost->hostt->name);
dump_stack();