diff mbox series

[v2,05/13] nvdimm/blk: add error handling support for add_disk()

Message ID 20211103122157.1215783-6-mcgrof@kernel.org (mailing list archive)
State New, archived
Headers show
Series block: add_disk() error handling stragglers | expand

Commit Message

Luis Chamberlain Nov. 3, 2021, 12:21 p.m. UTC 
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>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
---
 drivers/nvdimm/blk.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

Comments

Christoph Hellwig Nov. 3, 2021, 4:06 p.m. UTC | #1 
Looks good,

Reviewed-by: Christoph Hellwig <hch@lst.de>
diff mbox series

Patch

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))