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From: Christoph Hellwig <hch@lst.de>
To: Jens Axboe <axboe@kernel.dk>
Cc: Coly Li <colyli@suse.de>, Song Liu <song@kernel.org>,
	Ulf Hansson <ulf.hansson@linaro.org>,
	Luis Chamberlain <mcgrof@kernel.org>,
	linux-block@vger.kernel.org, linux-bcache@vger.kernel.org,
	linux-raid@vger.kernel.org, linux-mmc@vger.kernel.org,
	linux-nvme@lists.infradead.org
Subject: [PATCH 6/8] bcache: add proper error unwinding in bcache_device_init
Date: Mon,  9 Aug 2021 08:40:26 +0200	[thread overview]
Message-ID: <20210809064028.1198327-7-hch@lst.de> (raw)
In-Reply-To: <20210809064028.1198327-1-hch@lst.de>

Except for the IDA none of the allocations in bcache_device_init is
unwound on error, fix that.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/md/bcache/super.c | 16 +++++++++++-----
 1 file changed, 11 insertions(+), 5 deletions(-)

diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c
index 185246a0d855..d0f08e946453 100644
--- a/drivers/md/bcache/super.c
+++ b/drivers/md/bcache/super.c
@@ -931,20 +931,20 @@ static int bcache_device_init(struct bcache_device *d, unsigned int block_size,
 	n = BITS_TO_LONGS(d->nr_stripes) * sizeof(unsigned long);
 	d->full_dirty_stripes = kvzalloc(n, GFP_KERNEL);
 	if (!d->full_dirty_stripes)
-		return -ENOMEM;
+		goto out_free_stripe_sectors_dirty;
 
 	idx = ida_simple_get(&bcache_device_idx, 0,
 				BCACHE_DEVICE_IDX_MAX, GFP_KERNEL);
 	if (idx < 0)
-		return idx;
+		goto out_free_full_dirty_stripes;
 
 	if (bioset_init(&d->bio_split, 4, offsetof(struct bbio, bio),
 			BIOSET_NEED_BVECS|BIOSET_NEED_RESCUER))
-		goto err;
+		goto out_ida_remove;
 
 	d->disk = blk_alloc_disk(NUMA_NO_NODE);
 	if (!d->disk)
-		goto err;
+		goto out_bioset_exit;
 
 	set_capacity(d->disk, sectors);
 	snprintf(d->disk->disk_name, DISK_NAME_LEN, "bcache%i", idx);
@@ -987,8 +987,14 @@ static int bcache_device_init(struct bcache_device *d, unsigned int block_size,
 
 	return 0;
 
-err:
+out_bioset_exit:
+	bioset_exit(&d->bio_split);
+out_ida_remove:
 	ida_simple_remove(&bcache_device_idx, idx);
+out_free_full_dirty_stripes:
+	kvfree(d->full_dirty_stripes);
+out_free_stripe_sectors_dirty:
+	kvfree(d->stripe_sectors_dirty);
 	return -ENOMEM;
 
 }
-- 
2.30.2


  parent reply	other threads:[~2021-08-09  6:48 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-09  6:40 remove GENHD_FL_UP Christoph Hellwig
2021-08-09  6:40 ` [PATCH 1/8] mmc: block: let device_add_disk create disk attributes Christoph Hellwig
2021-08-09 11:30   ` Ulf Hansson
2021-08-09  6:40 ` [PATCH 2/8] mmc: block: cleanup gendisk creation Christoph Hellwig
2021-08-09 11:30   ` Ulf Hansson
2021-08-09  6:40 ` [PATCH 3/8] nvme: remove the GENHD_FL_UP check in nvme_ns_remove Christoph Hellwig
2021-08-09  6:40 ` [PATCH 4/8] nvme: replace the GENHD_FL_UP check in nvme_mpath_shutdown_disk Christoph Hellwig
2021-08-09  6:40 ` [PATCH 5/8] sx8: use the internal state machine to check if del_gendisk needs to be called Christoph Hellwig
2021-08-09  6:40 ` Christoph Hellwig [this message]
2021-08-12 15:48   ` [PATCH 6/8] bcache: add proper error unwinding in bcache_device_init Coly Li
2021-08-09  6:40 ` [PATCH 7/8] bcache: move the del_gendisk call out of bcache_device_free Christoph Hellwig
2021-08-12  8:38   ` Coly Li
2021-08-09  6:40 ` [PATCH 8/8] block: remove GENHD_FL_UP Christoph Hellwig
2021-08-12 16:30 ` Jens Axboe

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