linux-kernel - [PATCH 13/14] block/ataflop: provide a helper for cleanup up an atari disk

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Date:   Fri,  3 Sep 2021 18:35:35 -0700
From:   Luis Chamberlain <mcgrof@...nel.org>
To:     axboe@...nel.dk, efremov@...ux.com, hch@....de
Cc:     linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        Luis Chamberlain <mcgrof@...nel.org>
Subject: [PATCH 13/14] block/ataflop: provide a helper for cleanup up an atari disk

Instead of using two separate code paths for cleaning up an atari disk,
use one. We take the more careful approach to check for *all* disk
types, as is done on exit. The init path didn't have that check as
the alternative disk types are only probed for later, they are not
initialized by default.

Yes, there is a shared tag for all disks.

Signed-off-by: Luis Chamberlain <mcgrof@...nel.org>
---
 drivers/block/ataflop.c | 34 +++++++++++++++++++---------------
 1 file changed, 19 insertions(+), 15 deletions(-)

diff --git a/drivers/block/ataflop.c b/drivers/block/ataflop.c
index 97f1c19f9c02..e9d874f51597 100644
--- a/drivers/block/ataflop.c
+++ b/drivers/block/ataflop.c
@@ -2009,6 +2009,20 @@ static void ataflop_probe(dev_t dev)
 	mutex_unlock(&ataflop_probe_lock);
 }
 
+static void atari_cleanup_floppy_disk(struct atari_floppy_struct *fs)
+{
+	int type;
+
+	for (type = 0; type < NUM_DISK_MINORS; type++) {
+		if (!fs->disk[type])
+			continue;
+		if (fs->registered[type])
+			del_gendisk(fs->disk[type]);
+		blk_cleanup_disk(fs->disk[type]);
+	}
+	blk_mq_free_tag_set(&fs->tag_set);
+}
+
 static int __init atari_floppy_init (void)
 {
 	int i;
@@ -2079,10 +2093,8 @@ static int __init atari_floppy_init (void)
 	return 0;
 
 err:
-	while (--i >= 0) {
-		blk_cleanup_disk(unit[i].disk[0]);
-		blk_mq_free_tag_set(&unit[i].tag_set);
-	}
+	while (--i >= 0)
+		atari_cleanup_floppy_disk(&unit[i]);
 
 	unregister_blkdev(FLOPPY_MAJOR, "fd");
 out_unlock:
@@ -2131,18 +2143,10 @@ __setup("floppy=", atari_floppy_setup);
 
 static void __exit atari_floppy_exit(void)
 {
-	int i, type;
+	int i;
 
-	for (i = 0; i < FD_MAX_UNITS; i++) {
-		for (type = 0; type < NUM_DISK_MINORS; type++) {
-			if (!unit[i].disk[type])
-				continue;
-			if (unit[i].registered[type])
-				del_gendisk(unit[i].disk[type]);
-			blk_cleanup_disk(unit[i].disk[type]);
-		}
-		blk_mq_free_tag_set(&unit[i].tag_set);
-	}
+	for (i = 0; i < FD_MAX_UNITS; i++)
+		atari_cleanup_floppy_disk(&unit[i]);
 	unregister_blkdev(FLOPPY_MAJOR, "fd");
 
 	del_timer_sync(&fd_timer);
-- 
2.30.2