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swim: simplify media change handling 

floppy_revalidate mostly duplicates work already done in floppy_open
despite only beeing called from floppy_open.  Remove the function and
just clear the ->ejected flag directly under the right condition.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2020-09-08 16:53:34 +02:00 committed by Jens Axboe
parent 7fe76fc04b
commit 433d21ce31
1 changed files with 2 additions and 22 deletions
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24
drivers/block/swim.c
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@ -217,8 +217,6 @@ extern int swim_read_sector_header(struct swim __iomem *base,
extern int swim_read_sector_data(struct swim __iomem *base,
unsigned char *data);
static int floppy_revalidate(struct gendisk *disk);
static DEFINE_MUTEX(swim_mutex);
static inline void set_swim_mode(struct swim __iomem *base, int enable)
{
@ -640,8 +638,8 @@ static int floppy_open(struct block_device *bdev, fmode_t mode)
return 0;
if (mode & (FMODE_READ|FMODE_WRITE)) {
if (bdev_check_media_change(bdev))
floppy_revalidate(bdev->bd_disk);
if (bdev_check_media_change(bdev) && fs->disk_in)
fs->ejected = 0;
if ((mode & FMODE_WRITE) && fs->write_protected) {
err = -EROFS;
goto out;
@ -738,24 +736,6 @@ static unsigned int floppy_check_events(struct gendisk *disk,
return fs->ejected ? DISK_EVENT_MEDIA_CHANGE : 0;
}
static int floppy_revalidate(struct gendisk *disk)
{
struct floppy_state *fs = disk->private_data;
struct swim __iomem *base = fs->swd->base;
swim_drive(base, fs->location);
if (fs->ejected)
setup_medium(fs);
if (!fs->disk_in)
swim_motor(base, OFF);
else
fs->ejected = 0;
return !fs->disk_in;
}
static const struct block_device_operations floppy_fops = {
.owner = THIS_MODULE,
.open = floppy_unlocked_open,