[PATCH v5 14/14] block: add __must_check for *add_disk*() callers

From: Luis Chamberlain <mcgrof@kernel.org>
To: axboe@kernel.dk, hch@lst.de, penguin-kernel@i-love.sakura.ne.jp,
	dan.j.williams@intel.com, vishal.l.verma@intel.com,
	dave.jiang@intel.com, ira.weiny@intel.com, richard@nod.at,
	miquel.raynal@bootlin.com, vigneshr@ti.com, efremov@linux.com,
	song@kernel.org, martin.petersen@oracle.com, hare@suse.de,
	jack@suse.cz, ming.lei@redhat.com, tj@kernel.org,
	mcgrof@kernel.org
Cc: linux-mtd@lists.infradead.org, linux-scsi@vger.kernel.org,
	linux-raid@vger.kernel.org, linux-block@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH v5 14/14] block: add __must_check for *add_disk*() callers
Date: Wed,  3 Nov 2021 16:04:37 -0700	[thread overview]
Message-ID: <20211103230437.1639990-15-mcgrof@kernel.org> (raw)
In-Reply-To: <20211103230437.1639990-1-mcgrof@kernel.org>

Now that we have done a spring cleaning on all drivers and added
error checking / handling, let's keep it that way and ensure
no new drivers fail to stick with it.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
---
 block/genhd.c         | 6 +++---
 include/linux/genhd.h | 6 +++---
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/block/genhd.c b/block/genhd.c
index 2f5b7e24e88a..2263f7862241 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -394,8 +394,8 @@ static void disk_scan_partitions(struct gendisk *disk)
  * This function registers the partitioning information in @disk
  * with the kernel.
  */
-int device_add_disk(struct device *parent, struct gendisk *disk,
-		     const struct attribute_group **groups)
+int __must_check device_add_disk(struct device *parent, struct gendisk *disk,
+				 const struct attribute_group **groups)
 
 {
 	struct device *ddev = disk_to_dev(disk);
@@ -542,7 +542,7 @@ int device_add_disk(struct device *parent, struct gendisk *disk,
 out_free_ext_minor:
 	if (disk->major == BLOCK_EXT_MAJOR)
 		blk_free_ext_minor(disk->first_minor);
-	return WARN_ON_ONCE(ret); /* keep until all callers handle errors */
+	return ret;
 }
 EXPORT_SYMBOL(device_add_disk);
 
diff --git a/include/linux/genhd.h b/include/linux/genhd.h
index 59eabbc3a36b..f7d6810e68b3 100644
--- a/include/linux/genhd.h
+++ b/include/linux/genhd.h
@@ -205,9 +205,9 @@ static inline dev_t disk_devt(struct gendisk *disk)
 void disk_uevent(struct gendisk *disk, enum kobject_action action);
 
 /* block/genhd.c */
-int device_add_disk(struct device *parent, struct gendisk *disk,
-		const struct attribute_group **groups);
-static inline int add_disk(struct gendisk *disk)
+int __must_check device_add_disk(struct device *parent, struct gendisk *disk,
+				 const struct attribute_group **groups);
+static inline int __must_check add_disk(struct gendisk *disk)
 {
 	return device_add_disk(NULL, disk, NULL);
 }
-- 
2.33.0

