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authorChristoph Hellwig <hch@lst.de>2021-11-29 11:21:38 +0100
committerDan Williams <dan.j.williams@intel.com>2021-12-04 08:58:51 -0800
commitfb08a1908cb119a4585611d91461ab6d27756b14 (patch)
treedf0b9e60a5a175ca0b7ba47e0792691fe4c1ad9d /drivers/s390
parentafd586f0d06ce3d81b7c474499630fec88833828 (diff)
downloadlinux-fb08a1908cb119a4585611d91461ab6d27756b14.tar.bz2
dax: simplify the dax_device <-> gendisk association
Replace the dax_host_hash with an xarray indexed by the pointer value of the gendisk, and require explicitly calls from the block drivers that want to associate their gendisk with a dax_device. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Mike Snitzer <snitzer@redhat.com> Reviewed-by: Darrick J. Wong <djwong@kernel.org> Link: https://lore.kernel.org/r/20211129102203.2243509-5-hch@lst.de Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/s390')
-rw-r--r--drivers/s390/block/dcssblk.c11
1 files changed, 8 insertions, 3 deletions
diff --git a/drivers/s390/block/dcssblk.c b/drivers/s390/block/dcssblk.c
index 27ab888b44d0..657e492f2bc2 100644
--- a/drivers/s390/block/dcssblk.c
+++ b/drivers/s390/block/dcssblk.c
@@ -687,18 +687,21 @@ dcssblk_add_store(struct device *dev, struct device_attribute *attr, const char
if (rc)
goto put_dev;
- dev_info->dax_dev = alloc_dax(dev_info, dev_info->gd->disk_name,
- &dcssblk_dax_ops, DAXDEV_F_SYNC);
+ dev_info->dax_dev = alloc_dax(dev_info, &dcssblk_dax_ops,
+ DAXDEV_F_SYNC);
if (IS_ERR(dev_info->dax_dev)) {
rc = PTR_ERR(dev_info->dax_dev);
dev_info->dax_dev = NULL;
goto put_dev;
}
+ rc = dax_add_host(dev_info->dax_dev, dev_info->gd);
+ if (rc)
+ goto out_dax;
get_device(&dev_info->dev);
rc = device_add_disk(&dev_info->dev, dev_info->gd, NULL);
if (rc)
- goto out_dax;
+ goto out_dax_host;
switch (dev_info->segment_type) {
case SEG_TYPE_SR:
@@ -714,6 +717,8 @@ dcssblk_add_store(struct device *dev, struct device_attribute *attr, const char
rc = count;
goto out;
+out_dax_host:
+ dax_remove_host(dev_info->gd);
out_dax:
put_device(&dev_info->dev);
kill_dax(dev_info->dax_dev);