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From: Christoph Hellwig <hch@lst.de>
To: Dan Williams <dan.j.williams@intel.com>, Jens Axboe <axboe@kernel.dk>
Cc: Vishal Verma <vishal.l.verma@intel.com>,
	Dave Jiang <dave.jiang@intel.com>,
	Ira Weiny <ira.weiny@intel.com>,
	linux-block@vger.kernel.org, nvdimm@lists.linux.dev
Subject: [PATCH 3/3] block: warn if ->groups is set when calling add_disk
Date: Mon, 20 Sep 2021 09:27:26 +0200	[thread overview]
Message-ID: <20210920072726.1159572-4-hch@lst.de> (raw)
In-Reply-To: <20210920072726.1159572-1-hch@lst.de>

The proper API is to pass the groups to device_add_disk, but the code
used to also allow groups being set before calling *add_disk.  Warn
about that but keep the group pointer intact for now so that it can
be removed again after a grace period.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Fixes: 52b85909f85d ("block: fold register_disk into device_add_disk")
---
 block/genhd.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/block/genhd.c b/block/genhd.c
index 7b6e5e1cf9564..409cf608cc5bd 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -439,7 +439,8 @@ int device_add_disk(struct device *parent, struct gendisk *disk,
 	dev_set_uevent_suppress(ddev, 1);
 
 	ddev->parent = parent;
-	ddev->groups = groups;
+	if (!WARN_ON_ONCE(ddev->groups))
+		ddev->groups = groups;
 	dev_set_name(ddev, "%s", disk->disk_name);
 	if (!(disk->flags & GENHD_FL_HIDDEN))
 		ddev->devt = MKDEV(disk->major, disk->first_minor);
-- 
2.30.2


  parent reply	other threads:[~2021-09-20  7:29 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-20  7:27 fix a dax/block device attribute registration regression Christoph Hellwig
2021-09-20  7:27 ` [PATCH 1/3] nvdimm/pmem: fix creating the dax group Christoph Hellwig
2021-09-20 22:52   ` Ira Weiny
2021-09-20 23:09   ` Dan Williams
2021-09-20  7:27 ` [PATCH 2/3] nvdimm/pmem: move dax_attribute_group from dax to pmem Christoph Hellwig
2021-09-20 18:00   ` kernel test robot
2021-09-20 23:29     ` Dan Williams
2021-09-20 22:51   ` Ira Weiny
2021-09-20 23:36     ` Dan Williams
2021-09-20 23:37   ` Dan Williams
2021-09-20  7:27 ` Christoph Hellwig [this message]
2021-09-20 22:52   ` [PATCH 3/3] block: warn if ->groups is set when calling add_disk Ira Weiny
2021-09-20 23:50   ` Dan Williams
2021-09-21  6:32     ` Christoph Hellwig
2021-09-22 17:34 dax_supported() related cleanups v2 Christoph Hellwig
2021-09-22 17:34 ` [PATCH 3/3] block: warn if ->groups is set when calling add_disk Christoph Hellwig
2021-09-22 18:33 fix a dax/block device attribute registration regression Christoph Hellwig
2021-09-22 18:33 ` [PATCH 3/3] block: warn if ->groups is set when calling add_disk Christoph Hellwig

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