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authorLuis Chamberlain <mcgrof@kernel.org>2021-11-04 02:04:27 +0300
committerJens Axboe <axboe@kernel.dk>2021-11-04 14:48:49 +0300
commitdc104f4bb2d0a652dee010e47bc89c1ad2ab37c9 (patch)
treeb01ef7d6f5e41c03da1f0056c532df78f224f11a /drivers/nvdimm
parentb7421afcec0c77ab58633587ddc29d53e6eb95af (diff)
downloadlinux-dc104f4bb2d0a652dee010e47bc89c1ad2ab37c9.tar.xz
nvdimm/blk: add error handling support for add_disk()
We never checked for errors on add_disk() as this function returned void. Now that this is fixed, use the shiny new error handling. Since nvdimm/blk uses devm we just need to move the devm registration towards the end. And in hindsight, that seems to also provide a fix given del_gendisk() should not be called unless the disk was already added via add_disk(). The probably of that issue happening is low though, like OOM while calling devm_add_action(), so the fix is minor. We manually unwind in case of add_disk() failure prior to the devm registration. Reviewed-by: Dan Williams <dan.j.williams@intel.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Luis Chamberlain <mcgrof@kernel.org> Link: https://lore.kernel.org/r/20211103230437.1639990-5-mcgrof@kernel.org Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/nvdimm')
-rw-r--r--drivers/nvdimm/blk.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/nvdimm/blk.c b/drivers/nvdimm/blk.c
index 4eef67918a7e..228c33b8d1d6 100644
--- a/drivers/nvdimm/blk.c
+++ b/drivers/nvdimm/blk.c
@@ -264,7 +264,9 @@ static int nsblk_attach_disk(struct nd_namespace_blk *nsblk)
}
set_capacity(disk, available_disk_size >> SECTOR_SHIFT);
- device_add_disk(dev, disk, NULL);
+ rc = device_add_disk(dev, disk, NULL);
+ if (rc)
+ goto out_before_devm_err;
/* nd_blk_release_disk() is called if this fails */
if (devm_add_action_or_reset(dev, nd_blk_release_disk, disk))