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Commit 45e2b6a2 authored by Xie Yongji's avatar Xie Yongji Committed by Lee Jones
Browse files

BACKPORT: block: Add a helper to validate the block size 



commit 570b1cac477643cbf01a45fa5d018430a1fddbce upstream.

There are some duplicated codes to validate the block
size in block drivers. This limitation actually comes
from block layer, so this patch tries to add a new block
layer helper for that.

Bug: 226679849
Signed-off-by: default avatarXie Yongji <xieyongji@bytedance.com>
Link: https://lore.kernel.org/r/20211026144015.188-2-xieyongji@bytedance.com


Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
Signed-off-by: default avatarLee Jones <lee.jones@linaro.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Change-Id: I869a720a18f85fac878459f719cae6a7183a8745
parent 353ca06c

include/linux/blkdev.h

+8 −0
Original line number Diff line number Diff line
@@ -60,6 +60,14 @@ struct keyslot_manager; 
 */

#define BLKCG_MAX_POLS		5



static inline int blk_validate_block_size(unsigned int bsize)

{

	if (bsize < 512 || bsize > PAGE_SIZE || !is_power_of_2(bsize))

		return -EINVAL;



	return 0;

}



typedef void (rq_end_io_fn)(struct request *, blk_status_t);



/*