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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 04/10] block: nbd: use blk_is_valid_logical_block_size
Date:   Tue, 21 Jul 2020 13:52:33 +0300
Message-Id: <20200721105239.8270-5-mlevitsk@redhat.com>
In-Reply-To: <20200721105239.8270-1-mlevitsk@redhat.com>
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This allows to remove nbd's own check for valid block size

Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
---
 drivers/block/nbd.c | 12 ++----------
 1 file changed, 2 insertions(+), 10 deletions(-)

diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index ce7e9f223b20b..2cd9c4e824f8b 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -1347,14 +1347,6 @@ static void nbd_clear_sock_ioctl(struct nbd_device *nbd,
 		nbd_config_put(nbd);
 }
 
-static bool nbd_is_valid_blksize(unsigned long blksize)
-{
-	if (!blksize || !is_power_of_2(blksize) || blksize < 512 ||
-	    blksize > PAGE_SIZE)
-		return false;
-	return true;
-}
-
 static void nbd_set_cmd_timeout(struct nbd_device *nbd, u64 timeout)
 {
 	nbd->tag_set.timeout = timeout * HZ;
@@ -1379,7 +1371,7 @@ static int __nbd_ioctl(struct block_device *bdev, struct nbd_device *nbd,
 	case NBD_SET_BLKSIZE:
 		if (!arg)
 			arg = NBD_DEF_BLKSIZE;
-		if (!nbd_is_valid_blksize(arg))
+		if (!blk_is_valid_logical_block_size(arg))
 			return -EINVAL;
 		nbd_size_set(nbd, arg,
 			     div_s64(config->bytesize, arg));
@@ -1811,7 +1803,7 @@ static int nbd_genl_size_set(struct genl_info *info, struct nbd_device *nbd)
 		bsize = nla_get_u64(info->attrs[NBD_ATTR_BLOCK_SIZE_BYTES]);
 		if (!bsize)
 			bsize = NBD_DEF_BLKSIZE;
-		if (!nbd_is_valid_blksize(bsize)) {
+		if (!blk_is_valid_logical_block_size(bsize)) {
 			printk(KERN_ERR "Invalid block size %llu\n", bsize);
 			return -EINVAL;
 		}
-- 
2.26.2