Merge remote-tracking branch 'scsi-queue/core-for-3.19' into for-linus

4 files changed, 33 insertions, 3 deletions

diff --git a/block/blk-core.c b/block/blk-core.c
index 0421b53e6431..2e7424b42947 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -1266,7 +1266,7 @@ void blk_requeue_request(struct request_queue *q, struct request *rq)
         blk_clear_rq_complete(rq);
         trace_block_rq_requeue(q, rq);
 
-        if (blk_rq_tagged(rq))
+        if (rq->cmd_flags & REQ_QUEUED)
                 blk_queue_end_tag(q, rq);
 
         BUG_ON(blk_queued_rq(rq));
@@ -2554,7 +2554,7 @@ EXPORT_SYMBOL_GPL(blk_unprep_request);
  */
 void blk_finish_request(struct request *req, int error)
 {
-        if (blk_rq_tagged(req))
+        if (req->cmd_flags & REQ_QUEUED)
                 blk_queue_end_tag(req->q, req);
 
         BUG_ON(blk_queued_rq(req));
diff --git a/block/blk-mq-tag.c b/block/blk-mq-tag.c
index 8317175a3009..728b9a4d5f56 100644
--- a/block/blk-mq-tag.c
+++ b/block/blk-mq-tag.c
@@ -584,6 +584,34 @@ int blk_mq_tag_update_depth(struct blk_mq_tags *tags, unsigned int tdepth)
         return 0;
 }
 
+/**
+ * blk_mq_unique_tag() - return a tag that is unique queue-wide
+ * @rq: request for which to compute a unique tag
+ *
+ * The tag field in struct request is unique per hardware queue but not over
+ * all hardware queues. Hence this function that returns a tag with the
+ * hardware context index in the upper bits and the per hardware queue tag in
+ * the lower bits.
+ *
+ * Note: When called for a request that is queued on a non-multiqueue request
+ * queue, the hardware context index is set to zero.
+ */
+u32 blk_mq_unique_tag(struct request *rq)
+{
+        struct request_queue *q = rq->q;
+        struct blk_mq_hw_ctx *hctx;
+        int hwq = 0;
+
+        if (q->mq_ops) {
+                hctx = q->mq_ops->map_queue(q, rq->mq_ctx->cpu);
+                hwq = hctx->queue_num;
+        }
+
+        return (hwq << BLK_MQ_UNIQUE_TAG_BITS) |
+                (rq->tag & BLK_MQ_UNIQUE_TAG_MASK);
+}
+EXPORT_SYMBOL(blk_mq_unique_tag);
+
 ssize_t blk_mq_tag_sysfs_show(struct blk_mq_tags *tags, char *page)
 {
         char *orig_page = page;
diff --git a/block/blk-mq.c b/block/blk-mq.c
index 1d016fc9a8b6..92ceef0d2ab9 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -2049,6 +2049,8 @@ static int blk_mq_alloc_rq_maps(struct blk_mq_tag_set *set)
  */
 int blk_mq_alloc_tag_set(struct blk_mq_tag_set *set)
 {
+        BUILD_BUG_ON(BLK_MQ_MAX_DEPTH > 1 << BLK_MQ_UNIQUE_TAG_BITS);
+
         if (!set->nr_hw_queues)
                 return -EINVAL;
         if (!set->queue_depth)
diff --git a/block/scsi_ioctl.c b/block/scsi_ioctl.c
index b0c2a616c8f9..28163fad3c5d 100644
--- a/block/scsi_ioctl.c
+++ b/block/scsi_ioctl.c
@@ -142,7 +142,7 @@ static void blk_set_cmd_filter_defaults(struct blk_cmd_filter *filter)
         __set_bit(GPCMD_VERIFY_10, filter->read_ok);
         __set_bit(VERIFY_16, filter->read_ok);
         __set_bit(REPORT_LUNS, filter->read_ok);
-        __set_bit(SERVICE_ACTION_IN, filter->read_ok);
+        __set_bit(SERVICE_ACTION_IN_16, filter->read_ok);
         __set_bit(RECEIVE_DIAGNOSTIC, filter->read_ok);
         __set_bit(MAINTENANCE_IN, filter->read_ok);
         __set_bit(GPCMD_READ_BUFFER_CAPACITY, filter->read_ok);