linux-kernel - [PATCH 06/10] block/rsxx: add error handling support for add

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Date:   Wed,  1 Sep 2021 14:00:24 -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 06/10] block/rsxx: 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.

Signed-off-by: Luis Chamberlain <mcgrof@...nel.org>
---
 drivers/block/rsxx/core.c |  4 +++-
 drivers/block/rsxx/dev.c  | 12 +++++++++---
 2 files changed, 12 insertions(+), 4 deletions(-)

diff --git a/drivers/block/rsxx/core.c b/drivers/block/rsxx/core.c
index 83636714b8d7..8d9d69f5dfbc 100644
--- a/drivers/block/rsxx/core.c
+++ b/drivers/block/rsxx/core.c
@@ -935,7 +935,9 @@ static int rsxx_pci_probe(struct pci_dev *dev,
 			card->size8 = 0;
 	}
 
-	rsxx_attach_dev(card);
+	st = rsxx_attach_dev(card);
+	if (st)
+		goto failed_create_dev;
 
 	/************* Setup Debugfs *************/
 	rsxx_debugfs_dev_new(card);
diff --git a/drivers/block/rsxx/dev.c b/drivers/block/rsxx/dev.c
index 1cc40b0ea761..b2d3ac3efce2 100644
--- a/drivers/block/rsxx/dev.c
+++ b/drivers/block/rsxx/dev.c
@@ -192,6 +192,8 @@ static bool rsxx_discard_supported(struct rsxx_cardinfo *card)
 
 int rsxx_attach_dev(struct rsxx_cardinfo *card)
 {
+	int err = 0;
+
 	mutex_lock(&card->dev_lock);
 
 	/* The block device requires the stripe size from the config. */
@@ -200,13 +202,17 @@ int rsxx_attach_dev(struct rsxx_cardinfo *card)
 			set_capacity(card->gendisk, card->size8 >> 9);
 		else
 			set_capacity(card->gendisk, 0);
-		device_add_disk(CARD_TO_DEV(card), card->gendisk, NULL);
-		card->bdev_attached = 1;
+		err = device_add_disk(CARD_TO_DEV(card), card->gendisk, NULL);
+		if (err == 0)
+			card->bdev_attached = 1;
 	}
 
 	mutex_unlock(&card->dev_lock);
 
-	return 0;
+	if (err)
+		blk_cleanup_disk(card->gendisk);
+
+	return err;
 }
 
 void rsxx_detach_dev(struct rsxx_cardinfo *card)
-- 
2.30.2