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block: don't call into the driver for BLKFLSBUF 

BLKFLSBUF is entirely contained in the block core, and there is no
good reason to give the driver a hook into processing it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2020-11-03 11:00:10 +01:00 committed by Jens Axboe
parent daaedb820a
commit 4a9d6d667f
1 changed files with 0 additions and 7 deletions
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7
block/ioctl.c
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@ -369,15 +369,8 @@ static inline int is_unrecognized_ioctl(int ret)
static int blkdev_flushbuf(struct block_device *bdev, fmode_t mode,
unsigned cmd, unsigned long arg)
{
int ret;
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
ret = __blkdev_driver_ioctl(bdev, mode, cmd, arg);
if (!is_unrecognized_ioctl(ret))
return ret;
fsync_bdev(bdev);
invalidate_bdev(bdev);
return 0;