[PATCH 03/10] block: loop: use blk_is_valid_logical_block_size

From: Maxim Levitsky <mlevitsk@redhat.com>
To: linux-kernel@vger.kernel.org
Cc: Keith Busch <kbusch@kernel.org>,
	Josef Bacik <josef@toxicpanda.com>,
	linux-block@vger.kernel.org (open list:BLOCK LAYER),
	Sagi Grimberg <sagi@grimberg.me>, Jens Axboe <axboe@kernel.dk>,
	linux-nvme@lists.infradead.org (open list:NVM EXPRESS DRIVER),
	linux-scsi@vger.kernel.org (open list:SCSI CDROM DRIVER),
	Tejun Heo <tj@kernel.org>, Bart Van Assche <bvanassche@acm.org>,
	"Martin K. Petersen" <martin.petersen@oracle.com>,
	Damien Le Moal <damien.lemoal@wdc.com>,
	Jason Wang <jasowang@redhat.com>,
	Maxim Levitsky <maximlevitsky@gmail.com>,
	Stefan Hajnoczi <stefanha@redhat.com>,
	Colin Ian King <colin.king@canonical.com>,
	"Michael S. Tsirkin" <mst@redhat.com>,
	Paolo Bonzini <pbonzini@redhat.com>,
	Ulf Hansson <ulf.hansson@linaro.org>,
	Ajay Joshi <ajay.joshi@wdc.com>, Ming Lei <ming.lei@redhat.com>,
	linux-mmc@vger.kernel.org (open list:SONY MEMORYSTICK SUBSYSTEM),
	Christoph Hellwig <hch@lst.de>,
	Satya Tangirala <satyat@google.com>,
	nbd@other.debian.org (open list:NETWORK BLOCK DEVICE (NBD)),
	Hou Tao <houtao1@huawei.com>, Jens Axboe <axboe@fb.com>,
	virtualization@lists.linux-foundation.org (open list:VIRTIO CORE
	AND NET DRIVERS), "James E.J. Bottomley" <jejb@linux.ibm.com>,
	Alex Dubov <oakad@yahoo.com>,
	Maxim Levitsky <mlevitsk@redhat.com>
Subject: [PATCH 03/10] block: loop: use blk_is_valid_logical_block_size
Date: Tue, 21 Jul 2020 13:52:32 +0300	[thread overview]
Message-ID: <20200721105239.8270-4-mlevitsk@redhat.com> (raw)
In-Reply-To: <20200721105239.8270-1-mlevitsk@redhat.com>

This allows to remove loop's own check for supported block size

Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
---
 drivers/block/loop.c | 23 +++++------------------
 1 file changed, 5 insertions(+), 18 deletions(-)

diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index 475e1a738560d..9984c8f824271 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -228,19 +228,6 @@ static void __loop_update_dio(struct loop_device *lo, bool dio)
 		blk_mq_unfreeze_queue(lo->lo_queue);
 }
 
-/**
- * loop_validate_block_size() - validates the passed in block size
- * @bsize: size to validate
- */
-static int
-loop_validate_block_size(unsigned short bsize)
-{
-	if (bsize < 512 || bsize > PAGE_SIZE || !is_power_of_2(bsize))
-		return -EINVAL;
-
-	return 0;
-}
-
 /**
  * loop_set_size() - sets device size and notifies userspace
  * @lo: struct loop_device to set the size for
@@ -1119,9 +1106,10 @@ static int loop_configure(struct loop_device *lo, fmode_t mode,
 	}
 
 	if (config->block_size) {
-		error = loop_validate_block_size(config->block_size);
-		if (error)
+		if (!blk_is_valid_logical_block_size(config->block_size)) {
+			error = -EINVAL;
 			goto out_unlock;
+		}
 	}
 
 	error = loop_set_status_from_info(lo, &config->info);
@@ -1607,9 +1595,8 @@ static int loop_set_block_size(struct loop_device *lo, unsigned long arg)
 	if (lo->lo_state != Lo_bound)
 		return -ENXIO;
 
-	err = loop_validate_block_size(arg);
-	if (err)
-		return err;
+	if (!blk_is_valid_logical_block_size(arg))
+		return -EINVAL;
 
 	if (lo->lo_queue->limits.logical_block_size == arg)
 		return 0;
-- 
2.26.2

