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Diffstat (limited to 'fs/ext4/inode.c')
-rw-r--r--fs/ext4/inode.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 4247d8d25687..2cb2634daa99 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -3305,6 +3305,7 @@ static int ext4_releasepage(struct page *page, gfp_t wait)
static int ext4_iomap_begin(struct inode *inode, loff_t offset, loff_t length,
unsigned flags, struct iomap *iomap)
{
+ struct block_device *bdev;
unsigned int blkbits = inode->i_blkbits;
unsigned long first_block = offset >> blkbits;
unsigned long last_block = (offset + length - 1) >> blkbits;
@@ -3373,7 +3374,12 @@ retry:
}
iomap->flags = 0;
- iomap->bdev = inode->i_sb->s_bdev;
+ bdev = inode->i_sb->s_bdev;
+ iomap->bdev = bdev;
+ if (blk_queue_dax(bdev->bd_queue))
+ iomap->dax_dev = dax_get_by_host(bdev->bd_disk->disk_name);
+ else
+ iomap->dax_dev = NULL;
iomap->offset = first_block << blkbits;
if (ret == 0) {
@@ -3406,6 +3412,7 @@ static int ext4_iomap_end(struct inode *inode, loff_t offset, loff_t length,
int blkbits = inode->i_blkbits;
bool truncate = false;
+ put_dax(iomap->dax_dev);
if (!(flags & IOMAP_WRITE) || (flags & IOMAP_FAULT))
return 0;