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Commit 8714f8f5 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'for-linus' of git://git.kernel.dk/linux-block 

Pull block layer fixes from Jens Axboe:
 "A small collection of fixes for the current series.  This contains:

   - Two fixes for xen-blkfront, from Bob Liu.

   - A bug fix for NVMe, releasing only the specific resources we
     requested.

   - Fix for a debugfs flags entry for nbd, from Josef.

   - Plug fix from Omar, fixing up a case of code being switched between
     two functions.

   - A missing bio_put() for the new discard callers of
     submit_bio_wait(), fixing a regression causing a leak of the bio.
     From Shaun.

   - Improve dirty limit calculation precision in the writeback code,
     fixing a case where setting a limit lower than 1% of memory would
     end up being zero.  From Tejun"

* 'for-linus' of git://git.kernel.dk/linux-block:
  NVMe: Only release requested regions
  xen-blkfront: fix resume issues after a migration
  xen-blkfront: don't call talk_to_blkback when already connected to blkback
  nbd: pass the nbd pointer for flags debugfs
  block: missing bio_put following submit_bio_wait
  blk-mq: really fix plug list flushing for nomerge queues
  writeback: use higher precision calculation in domain_dirty_limits()
parents 3a7c114d edb50a54

block/blk-lib.c

+9 −3
Original line number Diff line number Diff line
@@ -113,6 +113,7 @@ int blkdev_issue_discard(struct block_device *bdev, sector_t sector, 
		ret = submit_bio_wait(type, bio);

		if (ret == -EOPNOTSUPP)

			ret = 0;

		bio_put(bio);

	}

	blk_finish_plug(&plug);
@@ -165,8 +166,10 @@ int blkdev_issue_write_same(struct block_device *bdev, sector_t sector, 
		}

	}



	if (bio)

	if (bio) {

		ret = submit_bio_wait(REQ_WRITE | REQ_WRITE_SAME, bio);

		bio_put(bio);

	}

	return ret != -EOPNOTSUPP ? ret : 0;

}

EXPORT_SYMBOL(blkdev_issue_write_same);
@@ -206,8 +209,11 @@ static int __blkdev_issue_zeroout(struct block_device *bdev, sector_t sector, 
		}

	}



	if (bio)

		return submit_bio_wait(WRITE, bio);

	if (bio) {

		ret = submit_bio_wait(WRITE, bio);

		bio_put(bio);

		return ret;

	}

	return 0;

}

block/blk-mq.c

+8 −9
Original line number Diff line number Diff line
@@ -1262,12 +1262,9 @@ static blk_qc_t blk_mq_make_request(struct request_queue *q, struct bio *bio) 


	blk_queue_split(q, &bio, q->bio_split);



	if (!is_flush_fua && !blk_queue_nomerges(q)) {

		if (blk_attempt_plug_merge(q, bio, &request_count,

					   &same_queue_rq))

	if (!is_flush_fua && !blk_queue_nomerges(q) &&

	    blk_attempt_plug_merge(q, bio, &request_count, &same_queue_rq))

		return BLK_QC_T_NONE;

	} else

		request_count = blk_plug_queued_count(q);



	rq = blk_mq_map_request(q, bio, &data);

	if (unlikely(!rq))
@@ -1358,9 +1355,11 @@ static blk_qc_t blk_sq_make_request(struct request_queue *q, struct bio *bio) 


	blk_queue_split(q, &bio, q->bio_split);



	if (!is_flush_fua && !blk_queue_nomerges(q) &&

	    blk_attempt_plug_merge(q, bio, &request_count, NULL))

	if (!is_flush_fua && !blk_queue_nomerges(q)) {

		if (blk_attempt_plug_merge(q, bio, &request_count, NULL))

			return BLK_QC_T_NONE;

	} else

		request_count = blk_plug_queued_count(q);



	rq = blk_mq_map_request(q, bio, &data);

	if (unlikely(!rq))

drivers/block/nbd.c

+1 −1
Original line number Diff line number Diff line
@@ -941,7 +941,7 @@ static int nbd_dev_dbg_init(struct nbd_device *nbd) 
	debugfs_create_u64("size_bytes", 0444, dir, &nbd->bytesize);

	debugfs_create_u32("timeout", 0444, dir, &nbd->xmit_timeout);

	debugfs_create_u32("blocksize", 0444, dir, &nbd->blksize);

	debugfs_create_file("flags", 0444, dir, &nbd, &nbd_dbg_flags_ops);

	debugfs_create_file("flags", 0444, dir, nbd, &nbd_dbg_flags_ops);



	return 0;

}

drivers/block/xen-blkfront.c

+22 −13
Original line number Diff line number Diff line
@@ -874,8 +874,12 @@ static int blkif_queue_rq(struct blk_mq_hw_ctx *hctx, 
			  const struct blk_mq_queue_data *qd)

{

	unsigned long flags;

	struct blkfront_ring_info *rinfo = (struct blkfront_ring_info *)hctx->driver_data;

	int qid = hctx->queue_num;

	struct blkfront_info *info = hctx->queue->queuedata;

	struct blkfront_ring_info *rinfo = NULL;



	BUG_ON(info->nr_rings <= qid);

	rinfo = &info->rinfo[qid];

	blk_mq_start_request(qd->rq);

	spin_lock_irqsave(&rinfo->ring_lock, flags);

	if (RING_FULL(&rinfo->ring))
@@ -901,20 +905,9 @@ static int blkif_queue_rq(struct blk_mq_hw_ctx *hctx, 
	return BLK_MQ_RQ_QUEUE_BUSY;

}



static int blk_mq_init_hctx(struct blk_mq_hw_ctx *hctx, void *data,

			    unsigned int index)

{

	struct blkfront_info *info = (struct blkfront_info *)data;



	BUG_ON(info->nr_rings <= index);

	hctx->driver_data = &info->rinfo[index];

	return 0;

}



static struct blk_mq_ops blkfront_mq_ops = {

	.queue_rq = blkif_queue_rq,

	.map_queue = blk_mq_map_queue,

	.init_hctx = blk_mq_init_hctx,

};



static int xlvbd_init_blk_queue(struct gendisk *gd, u16 sector_size,
@@ -950,6 +943,7 @@ static int xlvbd_init_blk_queue(struct gendisk *gd, u16 sector_size, 
		return PTR_ERR(rq);

	}



	rq->queuedata = info;

	queue_flag_set_unlocked(QUEUE_FLAG_VIRT, rq);



	if (info->feature_discard) {
@@ -2149,6 +2143,8 @@ static int blkfront_resume(struct xenbus_device *dev) 
		return err;



	err = talk_to_blkback(dev, info);

	if (!err)

		blk_mq_update_nr_hw_queues(&info->tag_set, info->nr_rings);



	/*

	 * We have to wait for the backend to switch to
@@ -2485,10 +2481,23 @@ static void blkback_changed(struct xenbus_device *dev, 
		break;



	case XenbusStateConnected:

		if (dev->state != XenbusStateInitialised) {

		/*

		 * talk_to_blkback sets state to XenbusStateInitialised

		 * and blkfront_connect sets it to XenbusStateConnected

		 * (if connection went OK).

		 *

		 * If the backend (or toolstack) decides to poke at backend

		 * state (and re-trigger the watch by setting the state repeatedly

		 * to XenbusStateConnected (4)) we need to deal with this.

		 * This is allowed as this is used to communicate to the guest

		 * that the size of disk has changed!

		 */

		if ((dev->state != XenbusStateInitialised) &&

		    (dev->state != XenbusStateConnected)) {

			if (talk_to_blkback(dev, info))

				break;

		}



		blkfront_connect(info);

		break;

drivers/nvme/host/pci.c

+7 −2
Original line number Diff line number Diff line
@@ -1679,9 +1679,14 @@ static int nvme_pci_enable(struct nvme_dev *dev) 


static void nvme_dev_unmap(struct nvme_dev *dev)

{

	struct pci_dev *pdev = to_pci_dev(dev->dev);

	int bars;



	if (dev->bar)

		iounmap(dev->bar);

	pci_release_regions(to_pci_dev(dev->dev));



	bars = pci_select_bars(pdev, IORESOURCE_MEM);

	pci_release_selected_regions(pdev, bars);

}



static void nvme_pci_disable(struct nvme_dev *dev)
@@ -1924,7 +1929,7 @@ static int nvme_dev_map(struct nvme_dev *dev) 


       return 0;

  release:

       pci_release_regions(pdev);

       pci_release_selected_regions(pdev, bars);

       return -ENODEV;

}