linux-kernel - [PATCH 12/19] ide-cd: use bdev_check_media

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Message-Id: <20200902141218.212614-13-hch@lst.de>
Date:   Wed,  2 Sep 2020 16:12:11 +0200
From:   Christoph Hellwig <hch@....de>
To:     Jens Axboe <axboe@...nel.dk>
Cc:     Denis Efremov <efremov@...ux.com>, Tim Waugh <tim@...erelk.net>,
        Michal Simek <michal.simek@...inx.com>,
        Borislav Petkov <bp@...en8.de>,
        "David S. Miller" <davem@...emloft.net>,
        Song Liu <song@...nel.org>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        Finn Thain <fthain@...egraphics.com.au>,
        Michael Schmitz <schmitzmic@...il.com>,
        linux-m68k@...ts.linux-m68k.org, linux-block@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-ide@...r.kernel.org,
        linux-raid@...r.kernel.org, linux-scsi@...r.kernel.org,
        linux-fsdevel@...r.kernel.org
Subject: [PATCH 12/19] ide-cd: use bdev_check_media_changed

Switch to use bdev_check_media_changed instead of check_disk_change and
call idecd_revalidate_disk manually.  Given that idecd_revalidate_disk
only re-reads the TOC, and we already do the same at probe time, the
extra call into ->revalidate_disk from bdev_disk_changed is not required
either, so stop wiring up the method.

Signed-off-by: Christoph Hellwig <hch@....de>
---
 drivers/ide/ide-cd.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c
index 212bb2d8bf346a..6a38cbc80aea0d 100644
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -56,6 +56,7 @@ static DEFINE_MUTEX(ide_cd_mutex);
 static DEFINE_MUTEX(idecd_ref_mutex);
 
 static void ide_cd_release(struct device *);
+static int idecd_revalidate_disk(struct gendisk *disk);
 
 static struct cdrom_info *ide_cd_get(struct gendisk *disk)
 {
@@ -1611,7 +1612,8 @@ static int idecd_open(struct block_device *bdev, fmode_t mode)
 	struct cdrom_info *info;
 	int rc = -ENXIO;
 
-	check_disk_change(bdev);
+	if (bdev_check_media_change(bdev))
+		idecd_revalidate_disk(bdev->bd_disk);
 
 	mutex_lock(&ide_cd_mutex);
 	info = ide_cd_get(bdev->bd_disk);
@@ -1770,7 +1772,6 @@ static const struct block_device_operations idecd_ops = {
 	.compat_ioctl		= IS_ENABLED(CONFIG_COMPAT) ?
 				  idecd_compat_ioctl : NULL,
 	.check_events		= idecd_check_events,
-	.revalidate_disk	= idecd_revalidate_disk
 };
 
 /* module options */
-- 
2.28.0