From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Xie Yongji <xieyongji@bytedance.com>,
        Jens Axboe <axboe@kernel.dk>,
        Tadeusz Struk <tadeusz.struk@linaro.org>
Subject: [PATCH 5.15 13/20] loop: Use blk_validate_block_size() to validate block size
Date:   Fri, 19 Nov 2021 18:39:31 +0100
Message-Id: <20211119171445.089760603@linuxfoundation.org>
In-Reply-To: <20211119171444.640508836@linuxfoundation.org>
References: <20211119171444.640508836@linuxfoundation.org>
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From: Xie Yongji <xieyongji@bytedance.com>

commit af3c570fb0df422b4906ebd11c1bf363d89961d5 upstream.

Remove loop_validate_block_size() and use the block layer helper
to validate block size.

Signed-off-by: Xie Yongji <xieyongji@bytedance.com>
Link: https://lore.kernel.org/r/20211026144015.188-4-xieyongji@bytedance.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Cc: Tadeusz Struk <tadeusz.struk@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/block/loop.c |   17 ++---------------
 1 file changed, 2 insertions(+), 15 deletions(-)

--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -273,19 +273,6 @@ static void __loop_update_dio(struct loo
 }
 
 /**
- * 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
  * @size: new size of the loop device
@@ -1236,7 +1223,7 @@ static int loop_configure(struct loop_de
 	}
 
 	if (config->block_size) {
-		error = loop_validate_block_size(config->block_size);
+		error = blk_validate_block_size(config->block_size);
 		if (error)
 			goto out_unlock;
 	}
@@ -1759,7 +1746,7 @@ static int loop_set_block_size(struct lo
 	if (lo->lo_state != Lo_bound)
 		return -ENXIO;
 
-	err = loop_validate_block_size(arg);
+	err = blk_validate_block_size(arg);
 	if (err)
 		return err;