From: Christoph Hellwig <hch@lst.de>
Date: Tue, 3 Nov 2020 10:00:10 +0000 (+0100)
Subject: block: don't call into the driver for BLKFLSBUF
X-Git-Tag: v5.15~2162^2~63
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=4a9d6d667f0bafed55a9e9f5ae8bceb3680749d7;p=platform%2Fkernel%2Flinux-starfive.git

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>
---

diff --git a/block/ioctl.c b/block/ioctl.c
index 3fbc382..c6d8863 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;