Merge tag 'libnvdimm-for-6.5' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm

Pull nvdimm and DAX updates from Vishal Verma:
 "This is mostly small cleanups and fixes, with the biggest change being
  the change to the DAX fault handler allowing it to return
  VM_FAULT_HWPOISON.

  Summary:

   - DAX fixes and cleanups including a use after free, extra
     references, and device unregistration, and a redundant variable.

   - Allow the DAX fault handler to return VM_FAULT_HWPOISON

   - A few libnvdimm cleanups such as making some functions and
     variables static where sufficient.

   - Add a few missing prototypes for wrapped functions in
     tools/testing/nvdimm"

* tag 'libnvdimm-for-6.5' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
  dax: enable dax fault handler to report VM_FAULT_HWPOISON
  nvdimm: make security_show static
  nvdimm: make nd_class variable static
  dax/kmem: Pass valid argument to memory_group_register_static
  fsdax: remove redundant variable 'error'
  dax: Cleanup extra dax_region references
  dax: Introduce alloc_dev_dax_id()
  dax: Use device_unregister() in unregister_dax_mapping()
  dax: Fix dax_mapping_release() use after free
  tools/testing/nvdimm: Drop empty platform remove function
  libnvdimm: mark 'security_show' static again
  testing: nvdimm: add missing prototypes for wrapped functions
  dax: fix missing-prototype warnings

2 files changed, 9 insertions, 8 deletions

diff --git a/fs/dax.c b/fs/dax.c
index 2ababb89918d..906ecbd541a3 100644
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -1148,7 +1148,7 @@ static int dax_iomap_copy_around(loff_t pos, uint64_t length, size_t align_size,
 	if (!zero_edge) {
 		ret = dax_iomap_direct_access(srcmap, pos, size, &saddr, NULL);
 		if (ret)
-			return ret;
+			return dax_mem2blk_err(ret);
 	}
 
 	if (copy_all) {
@@ -1310,7 +1310,7 @@ static s64 dax_unshare_iter(struct iomap_iter *iter)
 
 out_unlock:
 	dax_read_unlock(id);
-	return ret;
+	return dax_mem2blk_err(ret);
 }
 
 int dax_file_unshare(struct inode *inode, loff_t pos, loff_t len,
@@ -1342,7 +1342,8 @@ static int dax_memzero(struct iomap_iter *iter, loff_t pos, size_t size)
 	ret = dax_direct_access(iomap->dax_dev, pgoff, 1, DAX_ACCESS, &kaddr,
 				NULL);
 	if (ret < 0)
-		return ret;
+		return dax_mem2blk_err(ret);
+
 	memset(kaddr + offset, 0, size);
 	if (iomap->flags & IOMAP_F_SHARED)
 		ret = dax_iomap_copy_around(pos, size, PAGE_SIZE, srcmap,
@@ -1498,7 +1499,7 @@ static loff_t dax_iomap_iter(const struct iomap_iter *iomi,
 
 		map_len = dax_direct_access(dax_dev, pgoff, PHYS_PFN(size),
 				DAX_ACCESS, &kaddr, NULL);
-		if (map_len == -EIO && iov_iter_rw(iter) == WRITE) {
+		if (map_len == -EHWPOISON && iov_iter_rw(iter) == WRITE) {
 			map_len = dax_direct_access(dax_dev, pgoff,
 					PHYS_PFN(size), DAX_RECOVERY_WRITE,
 					&kaddr, NULL);
@@ -1506,7 +1507,7 @@ static loff_t dax_iomap_iter(const struct iomap_iter *iomi,
 				recovery = true;
 		}
 		if (map_len < 0) {
-			ret = map_len;
+			ret = dax_mem2blk_err(map_len);
 			break;
 		}
 
@@ -1830,7 +1831,6 @@ static vm_fault_t dax_iomap_pmd_fault(struct vm_fault *vmf, pfn_t *pfnp,
 	vm_fault_t ret = VM_FAULT_FALLBACK;
 	pgoff_t max_pgoff;
 	void *entry;
-	int error;
 
 	if (vmf->flags & FAULT_FLAG_WRITE)
 		iter.flags |= IOMAP_WRITE;
@@ -1877,7 +1877,7 @@ static vm_fault_t dax_iomap_pmd_fault(struct vm_fault *vmf, pfn_t *pfnp,
 	}
 
 	iter.pos = (loff_t)xas.xa_index << PAGE_SHIFT;
-	while ((error = iomap_iter(&iter, ops)) > 0) {
+	while (iomap_iter(&iter, ops) > 0) {
 		if (iomap_length(&iter) < PMD_SIZE)
 			continue; /* actually breaks out of the loop */
 
diff --git a/fs/fuse/virtio_fs.c b/fs/fuse/virtio_fs.c
index 4d8d4f16c727..5f1be1da92ce 100644
--- a/fs/fuse/virtio_fs.c
+++ b/fs/fuse/virtio_fs.c
@@ -775,7 +775,8 @@ static int virtio_fs_zero_page_range(struct dax_device *dax_dev,
 	rc = dax_direct_access(dax_dev, pgoff, nr_pages, DAX_ACCESS, &kaddr,
 			       NULL);
 	if (rc < 0)
-		return rc;
+		return dax_mem2blk_err(rc);
+
 	memset(kaddr, 0, nr_pages << PAGE_SHIFT);
 	dax_flush(dax_dev, kaddr, nr_pages << PAGE_SHIFT);
 	return 0;