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crypto: omap - Avoid redundant copy when using truncated sg list

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omap_crypto_cleanup() currently copies data from sg to orig if either
copy flag is set.  However OMAP_CRYPTO_SG_COPIED means that sg refers
to the same pages as orig, truncated to len bytes.  There is no need
to copy in this case.

Only copy data if the OMAP_CRYPTO_DATA_COPIED flag is set.

Fixes: 74ed87e7e7f7 ("crypto: omap - add base support library for common ...")
Signed-off-by: Ben Hutchings <ben.hutchings@mind.be>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Ben Hutchings 2021-08-11 02:05:55 +02:00 committed by Herbert Xu
parent 9491923e4a
commit ffe3ee8bb6
1 changed files with 1 additions and 1 deletions
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2
drivers/crypto/omap-crypto.c
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@ -210,7 +210,7 @@ void omap_crypto_cleanup(struct scatterlist *sg, struct scatterlist *orig,
buf = sg_virt(sg);
pages = get_order(len);
if (orig && (flags & OMAP_CRYPTO_COPY_MASK))
if (orig && (flags & OMAP_CRYPTO_DATA_COPIED))
omap_crypto_copy_data(sg, orig, offset, len);
if (flags & OMAP_CRYPTO_DATA_COPIED)