Merge tag 'for-5.5/drivers-post-20191122' of git://git.kernel.dk/linux-block

Pull additional block driver updates from Jens Axboe:
 "Here's another block driver update, done to avoid conflicts with the
  zoned changes coming next.

  This contains:

   - Prepare SCSI sd for zone open/close/finish support

   - Small NVMe pull request
        - hwmon support (Akinobu)
        - add new co-maintainer (Christoph)
        - work-around for a discard issue on non-conformant drives
          (Eduard)

   - Small nbd leak fix"

* tag 'for-5.5/drivers-post-20191122' of git://git.kernel.dk/linux-block:
  nbd: prevent memory leak
  nvme: hwmon: add quirk to avoid changing temperature threshold
  nvme: hwmon: provide temperature min and max values for each sensor
  nvmet: add another maintainer
  nvme: Discard workaround for non-conformant devices
  nvme: Add hardware monitoring support
  scsi: sd_zbc: add zone open, close, and finish support

1 files changed, 15 insertions, 3 deletions

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index c5e434c9af62..8e8527408db3 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -613,8 +613,14 @@ static blk_status_t nvme_setup_discard(struct nvme_ns *ns, struct request *req,
 	struct nvme_dsm_range *range;
 	struct bio *bio;
 
-	range = kmalloc_array(segments, sizeof(*range),
-				GFP_ATOMIC | __GFP_NOWARN);
+	/*
+	 * Some devices do not consider the DSM 'Number of Ranges' field when
+	 * determining how much data to DMA. Always allocate memory for maximum
+	 * number of segments to prevent device reading beyond end of buffer.
+	 */
+	static const size_t alloc_size = sizeof(*range) * NVME_DSM_MAX_RANGES;
+
+	range = kzalloc(alloc_size, GFP_ATOMIC | __GFP_NOWARN);
 	if (!range) {
 		/*
 		 * If we fail allocation our range, fallback to the controller
@@ -654,7 +660,7 @@ static blk_status_t nvme_setup_discard(struct nvme_ns *ns, struct request *req,
 
 	req->special_vec.bv_page = virt_to_page(range);
 	req->special_vec.bv_offset = offset_in_page(range);
-	req->special_vec.bv_len = sizeof(*range) * segments;
+	req->special_vec.bv_len = alloc_size;
 	req->rq_flags |= RQF_SPECIAL_PAYLOAD;
 
 	return BLK_STS_OK;
@@ -2798,6 +2804,9 @@ int nvme_init_identify(struct nvme_ctrl *ctrl)
 	ctrl->oncs = le16_to_cpu(id->oncs);
 	ctrl->mtfa = le16_to_cpu(id->mtfa);
 	ctrl->oaes = le32_to_cpu(id->oaes);
+	ctrl->wctemp = le16_to_cpu(id->wctemp);
+	ctrl->cctemp = le16_to_cpu(id->cctemp);
+
 	atomic_set(&ctrl->abort_limit, id->acl + 1);
 	ctrl->vwc = id->vwc;
 	if (id->mdts)
@@ -2897,6 +2906,9 @@ int nvme_init_identify(struct nvme_ctrl *ctrl)
 	if (ret < 0)
 		return ret;
 
+	if (!ctrl->identified)
+		nvme_hwmon_init(ctrl);
+
 	ctrl->identified = true;
 
 	return 0;