linux-kernel - [PATCH v2 07/10] block/sunvdc: add error handling support for add

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Date:   Mon, 27 Sep 2021 15:01:54 -0700
From:   Luis Chamberlain <mcgrof@...nel.org>
To:     axboe@...nel.dk, bhelgaas@...gle.com, liushixin2@...wei.com,
        thunder.leizhen@...wei.com, lee.jones@...aro.org,
        geoff@...radead.org, mpe@...erman.id.au, benh@...nel.crashing.org,
        paulus@...ba.org, jim@...n.com, haris.iqbal@...os.com,
        jinpu.wang@...os.com, josh.h.morris@...ibm.com,
        pjk1939@...ux.ibm.com, tim@...erelk.net, richard@....at,
        miquel.raynal@...tlin.com, vigneshr@...com
Cc:     linux-mtd@...ts.infradead.org, linuxppc-dev@...ts.ozlabs.org,
        linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        Luis Chamberlain <mcgrof@...nel.org>
Subject: [PATCH v2 07/10] block/sunvdc: 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.

We re-use the same free tag call, so we also add a label for
that as well.

Signed-off-by: Luis Chamberlain <mcgrof@...nel.org>
---
 drivers/block/sunvdc.c | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/drivers/block/sunvdc.c b/drivers/block/sunvdc.c
index 4d4bb810c2ae..6f45a53f7cbf 100644
--- a/drivers/block/sunvdc.c
+++ b/drivers/block/sunvdc.c
@@ -826,8 +826,8 @@ static int probe_disk(struct vdc_port *port)
 	if (IS_ERR(g)) {
 		printk(KERN_ERR PFX "%s: Could not allocate gendisk.\n",
 		       port->vio.name);
-		blk_mq_free_tag_set(&port->tag_set);
-		return PTR_ERR(g);
+		err = PTR_ERR(g);
+		goto out_free_tag;
 	}
 
 	port->disk = g;
@@ -879,9 +879,17 @@ static int probe_disk(struct vdc_port *port)
 	       port->vdisk_size, (port->vdisk_size >> (20 - 9)),
 	       port->vio.ver.major, port->vio.ver.minor);
 
-	device_add_disk(&port->vio.vdev->dev, g, NULL);
+	err = device_add_disk(&port->vio.vdev->dev, g, NULL);
+	if (err)
+		goto out_cleanup_disk;
 
 	return 0;
+
+out_cleanup_disk:
+	blk_cleanup_disk(g);
+out_free_tag:
+	blk_mq_free_tag_set(&port->tag_set);
+	return err;
 }
 
 static struct ldc_channel_config vdc_ldc_cfg = {
-- 
2.30.2