linux-kernel - [PATCH 6/9] m68k/emu/nfblock: add error handling support for add

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Date:   Fri, 15 Oct 2021 16:30:25 -0700
From:   Luis Chamberlain <mcgrof@...nel.org>
To:     axboe@...nel.dk, jejb@...ux.ibm.com, martin.petersen@...cle.com,
        agk@...hat.com, snitzer@...hat.com, colyli@...e.de,
        kent.overstreet@...il.com, boris.ostrovsky@...cle.com,
        jgross@...e.com, sstabellini@...nel.org, roger.pau@...rix.com,
        geert@...ux-m68k.org, ulf.hansson@...aro.org, tj@...nel.org,
        hare@...e.de, jdike@...toit.com, richard@....at,
        anton.ivanov@...bridgegreys.com, johannes.berg@...el.com,
        krisman@...labora.com, chris.obbard@...labora.com,
        thehajime@...il.com, zhuyifei1999@...il.com, haris.iqbal@...os.com,
        jinpu.wang@...os.com, miquel.raynal@...tlin.com, vigneshr@...com,
        linux-mtd@...ts.infradead.org
Cc:     linux-scsi@...r.kernel.org, dm-devel@...hat.com,
        linux-bcache@...r.kernel.org, xen-devel@...ts.xenproject.org,
        linux-m68k@...ts.linux-m68k.org, linux-um@...ts.infradead.org,
        linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        Luis Chamberlain <mcgrof@...nel.org>
Subject: [PATCH 6/9] m68k/emu/nfblock: 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.

Reviewed-by: Geert Uytterhoeven <geert@...ux-m68k.org>
Acked-by: Geert Uytterhoeven <geert@...ux-m68k.org>
Signed-off-by: Luis Chamberlain <mcgrof@...nel.org>
---
 arch/m68k/emu/nfblock.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/arch/m68k/emu/nfblock.c b/arch/m68k/emu/nfblock.c
index 9a8394e96388..4de5a6087034 100644
--- a/arch/m68k/emu/nfblock.c
+++ b/arch/m68k/emu/nfblock.c
@@ -100,6 +100,7 @@ static int __init nfhd_init_one(int id, u32 blocks, u32 bsize)
 {
 	struct nfhd_device *dev;
 	int dev_id = id - NFHD_DEV_OFFSET;
+	int err = -ENOMEM;
 
 	pr_info("nfhd%u: found device with %u blocks (%u bytes)\n", dev_id,
 		blocks, bsize);
@@ -130,16 +131,20 @@ static int __init nfhd_init_one(int id, u32 blocks, u32 bsize)
 	sprintf(dev->disk->disk_name, "nfhd%u", dev_id);
 	set_capacity(dev->disk, (sector_t)blocks * (bsize / 512));
 	blk_queue_logical_block_size(dev->disk->queue, bsize);
-	add_disk(dev->disk);
+	err = add_disk(dev->disk);
+	if (err)
+		goto out_cleanup_disk;
 
 	list_add_tail(&dev->list, &nfhd_list);
 
 	return 0;
 
+out_cleanup_disk:
+	blk_cleanup_disk(dev->disk);
 free_dev:
 	kfree(dev);
 out:
-	return -ENOMEM;
+	return err;
 }
 
 static int __init nfhd_init(void)
-- 
2.30.2