linux-kernel - [RFC 10/12] block/ataflop add error handling support for add

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Message-Id: <20210715205920.2023980-11-mcgrof@kernel.org>
Date:   Thu, 15 Jul 2021 13:59:18 -0700
From:   Luis Chamberlain <mcgrof@...nel.org>
To:     axboe@...nel.dk
Cc:     hare@...e.de, bvanassche@....org, ming.lei@...hat.com,
        hch@...radead.org, jack@...e.cz, osandov@...com,
        linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        Luis Chamberlain <mcgrof@...nel.org>
Subject: [RFC 10/12] block/ataflop 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 reuse the atari_floppy_disk_remove() call.

Signed-off-by: Luis Chamberlain <mcgrof@...nel.org>
---
 drivers/block/ataflop.c | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/drivers/block/ataflop.c b/drivers/block/ataflop.c
index 73eb80b58888..4b3f1158fa04 100644
--- a/drivers/block/ataflop.c
+++ b/drivers/block/ataflop.c
@@ -2081,7 +2081,9 @@ static int __init atari_floppy_init (void)
 	for (i = 0; i < FD_MAX_UNITS; i++) {
 		unit[i].track = -1;
 		unit[i].flags = 0;
-		add_disk(unit[i].disk[0]);
+		ret = add_disk(unit[i].disk[0]);
+		if (ret)
+			goto err_out_dma;
 	}
 
 	printk(KERN_INFO "Atari floppy driver: max. %cD, %strack buffering\n",
@@ -2091,13 +2093,10 @@ static int __init atari_floppy_init (void)
 
 	return 0;
 
+err_out_dma:
+	atari_stram_free(DMABuffer);
 err:
-	while (--i >= 0) {
-		blk_cleanup_disk(unit[i].disk[0]);
-		blk_mq_free_tag_set(&unit[i].tag_set);
-	}
-
-	unregister_blkdev(FLOPPY_MAJOR, "fd");
+	atari_floppy_disk_remove();
 out_unlock:
 	mutex_unlock(&ataflop_probe_lock);
 	return ret;
-- 
2.27.0