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

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 <[e-mail]>
Signed-off-by: Herbert Xu <[e-mail]>

drivers/crypto/omap-crypto.c

···
 	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)