Merge branch 'for-4.6/drivers' of git://git.kernel.dk/linux-block

Pull block driver updates from Jens Axboe:
 "This is the block driver pull request for this merge window.  It sits
  on top of for-4.6/core, that was just sent out.

  This contains:

   - A set of fixes for lightnvm.  One from Alan, fixing an overflow,
     and the rest from the usual suspects, Javier and Matias.

   - A set of fixes for nbd from Markus and Dan, and a fixup from Arnd
     for correct usage of the signed 64-bit divider.

   - A set of bug fixes for the Micron mtip32xx, from Asai.

   - A fix for the brd discard handling from Bart.

   - Update the maintainers entry for cciss, since that hardware has
     transferred ownership.

   - Three bug fixes for bcache from Eric Wheeler.

   - Set of fixes for xen-blk{back,front} from Jan and Konrad.

   - Removal of the cpqarray driver.  It has been disabled in Kconfig
     since 2013, and we were initially scheduled to remove it in 3.15.

   - Various updates and fixes for NVMe, with the most important being:

        - Removal of the per-device NVMe thread, replacing that with a
          watchdog timer instead. From Christoph.

        - Exposing the namespace WWID through sysfs, from Keith.

        - Set of cleanups from Ming Lin.

        - Logging the controller device name instead of the underlying
          PCI device name, from Sagi.

        - And a bunch of fixes and optimizations from the usual suspects
          in this area"

* 'for-4.6/drivers' of git://git.kernel.dk/linux-block: (49 commits)
  NVMe: Expose ns wwid through single sysfs entry
  drivers:block: cpqarray clean up
  brd: Fix discard request processing
  cpqarray: remove it from the kernel
  cciss: update MAINTAINERS
  NVMe: Remove unused sq_head read in completion path
  bcache: fix cache_set_flush() NULL pointer dereference on OOM
  bcache: cleaned up error handling around register_cache()
  bcache: fix race of writeback thread starting before complete initialization
  NVMe: Create discard zero quirk white list
  nbd: use correct div_s64 helper
  mtip32xx: remove unneeded variable in mtip_cmd_timeout()
  lightnvm: generalize rrpc ppa calculations
  lightnvm: remove struct nvm_dev->total_blocks
  lightnvm: rename ->nr_pages to ->nr_sects
  lightnvm: update closed list outside of intr context
  xen/blback: Fit the important information of the thread in 17 characters
  lightnvm: fold get bb tbl when using dual/quad plane mode
  lightnvm: fix up nonsensical configure overrun checking
  xen-blkback: advertise indirect segment support earlier
  ...

1 files changed, 41 insertions, 5 deletions

diff --git a/drivers/nvme/host/lightnvm.c b/drivers/nvme/host/lightnvm.c
index 6bb15e4926dc..42a01a931989 100644
--- a/drivers/nvme/host/lightnvm.c
+++ b/drivers/nvme/host/lightnvm.c
@@ -379,8 +379,31 @@ out:
 	return ret;
 }
 
+static void nvme_nvm_bb_tbl_fold(struct nvm_dev *nvmdev,
+						int nr_dst_blks, u8 *dst_blks,
+						int nr_src_blks, u8 *src_blks)
+{
+	int blk, offset, pl, blktype;
+
+	for (blk = 0; blk < nr_dst_blks; blk++) {
+		offset = blk * nvmdev->plane_mode;
+		blktype = src_blks[offset];
+
+		/* Bad blocks on any planes take precedence over other types */
+		for (pl = 0; pl < nvmdev->plane_mode; pl++) {
+			if (src_blks[offset + pl] &
+					(NVM_BLK_T_BAD|NVM_BLK_T_GRWN_BAD)) {
+				blktype = src_blks[offset + pl];
+				break;
+			}
+		}
+
+		dst_blks[blk] = blktype;
+	}
+}
+
 static int nvme_nvm_get_bb_tbl(struct nvm_dev *nvmdev, struct ppa_addr ppa,
-				int nr_blocks, nvm_bb_update_fn *update_bbtbl,
+				int nr_dst_blks, nvm_bb_update_fn *update_bbtbl,
 				void *priv)
 {
 	struct request_queue *q = nvmdev->q;
@@ -388,7 +411,9 @@ static int nvme_nvm_get_bb_tbl(struct nvm_dev *nvmdev, struct ppa_addr ppa,
 	struct nvme_ctrl *ctrl = ns->ctrl;
 	struct nvme_nvm_command c = {};
 	struct nvme_nvm_bb_tbl *bb_tbl;
-	int tblsz = sizeof(struct nvme_nvm_bb_tbl) + nr_blocks;
+	u8 *dst_blks = NULL;
+	int nr_src_blks = nr_dst_blks * nvmdev->plane_mode;
+	int tblsz = sizeof(struct nvme_nvm_bb_tbl) + nr_src_blks;
 	int ret = 0;
 
 	c.get_bb.opcode = nvme_nvm_admin_get_bb_tbl;
@@ -399,6 +424,12 @@ static int nvme_nvm_get_bb_tbl(struct nvm_dev *nvmdev, struct ppa_addr ppa,
 	if (!bb_tbl)
 		return -ENOMEM;
 
+	dst_blks = kzalloc(nr_dst_blks, GFP_KERNEL);
+	if (!dst_blks) {
+		ret = -ENOMEM;
+		goto out;
+	}
+
 	ret = nvme_submit_sync_cmd(ctrl->admin_q, (struct nvme_command *)&c,
 								bb_tbl, tblsz);
 	if (ret) {
@@ -420,16 +451,21 @@ static int nvme_nvm_get_bb_tbl(struct nvm_dev *nvmdev, struct ppa_addr ppa,
 		goto out;
 	}
 
-	if (le32_to_cpu(bb_tbl->tblks) != nr_blocks) {
+	if (le32_to_cpu(bb_tbl->tblks) != nr_src_blks) {
 		ret = -EINVAL;
 		dev_err(ctrl->dev, "bbt unsuspected blocks returned (%u!=%u)",
-					le32_to_cpu(bb_tbl->tblks), nr_blocks);
+				le32_to_cpu(bb_tbl->tblks), nr_src_blks);
 		goto out;
 	}
 
+	nvme_nvm_bb_tbl_fold(nvmdev, nr_dst_blks, dst_blks,
+						nr_src_blks, bb_tbl->blk);
+
 	ppa = dev_to_generic_addr(nvmdev, ppa);
-	ret = update_bbtbl(ppa, nr_blocks, bb_tbl->blk, priv);
+	ret = update_bbtbl(ppa, nr_dst_blks, dst_blks, priv);
+
 out:
+	kfree(dst_blks);
 	kfree(bb_tbl);
 	return ret;
 }