Fix bio splitting in the crypto fallback code #41
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Prepare for calling blk_crypto_max_io_size() from the bio splitting code. No functionality has been changed. Signed-off-by: Bart Van Assche <bvanassche@acm.org> Reviewed-by: Christoph Hellwig <hch@lst.de>
Modify splitting of encrypted bios as follows: - Stop calling blk_crypto_bio_prep() for bio-based block drivers that do not call bio_split_to_limits(). - For request-based block drivers and for bio-based block drivers that call bio_split_to_limits(), call blk_crypto_bio_prep() after bio splitting happened instead of before bio splitting happened. - In bio_split_rw(), restrict the bio size to the smaller size of what is supported by the block driver and the crypto fallback code. The advantages of these changes are as follows: - This patch fixes write errors on zoned storage caused by out-of-order submission of bios. This out-of-order submission happens if both the crypto fallback code and bio_split_to_limits() split a bio. - Less code duplication. The crypto fallback code now calls bio_split_to_limits() instead of open-coding it. Signed-off-by: Bart Van Assche <bvanassche@acm.org>
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Pull request for series with
subject: Fix bio splitting in the crypto fallback code
version: 2
url: https://patchwork.kernel.org/project/linux-block/list/?series=981614