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bcache: fix ioctl in flash device 

When doing ioctl in flash device, it will call ioctl_dev() in super.c,
then we should not to get cached device since flash only device has
no backend device. This patch just move the jugement dc->io_disable
to cached_dev_ioctl() to make ioctl in flash device correctly.

Fixes: 0f0709e6bf ("bcache: stop bcache device when backing device is offline")
Signed-off-by: Tang Junhui <tang.junhui.linux@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Tang Junhui 2018-10-08 20:41:10 +08:00 committed by Jens Axboe
parent 752f66a75a
commit dd0c91793b
2 changed files with 3 additions and 4 deletions
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3
drivers/md/bcache/request.c
View File

@ -1218,6 +1218,9 @@ static int cached_dev_ioctl(struct bcache_device *d, fmode_t mode,
{
struct cached_dev *dc = container_of(d, struct cached_dev, disk);
if (dc->io_disable)
return -EIO;
return __blkdev_driver_ioctl(dc->bdev, mode, cmd, arg);
}

4
drivers/md/bcache/super.c
View File

@ -648,10 +648,6 @@ static int ioctl_dev(struct block_device *b, fmode_t mode,
unsigned int cmd, unsigned long arg)
{
struct bcache_device *d = b->bd_disk->private_data;
struct cached_dev *dc = container_of(d, struct cached_dev, disk);
if (dc->io_disable)
return -EIO;
return d->ioctl(d, mode, cmd, arg);
}