[PATCH 25/78] block: don't call into the driver for BLKFLSBUF

Christoph Hellwig
2020-11-16T15:02:35Z

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>
---
block/ioctl.c | 7 -------
1 file changed, 7 deletions(-)

diff --git a/block/ioctl.c b/block/ioctl.c
index 3fbc382eb926d4..c6d8863f040945 100644
--- a/block/ioctl.c
+++ b/block/ioctl.c
@@ -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;