crypto: scatterwalk - Add no-copy support to copychunks (85eccdde) · Commits · 戴 / test

The function ablkcipher_done_slow is pretty much identical to scatterwalk_copychunks except that it doesn't actually copy as the processing hasn't been completed yet. This patch allows scatterwalk_copychunks to be used in this case by specifying out == 2. Signed-off-by:

Herbert Xu <herbert@gondor.apana.org.au>

crypto/scatterwalk.c

+6 −4

Original line number	Diff line number	Diff line
		@@ -87,9 +87,11 @@ void scatterwalk_copychunks(void buf, struct scatter_walk walk,
		if (len_this_page > nbytes)
		len_this_page = nbytes;

		if (out != 2) {
		vaddr = scatterwalk_map(walk);
		memcpy_dir(buf, vaddr, len_this_page, out);
		scatterwalk_unmap(vaddr);
		}

		scatterwalk_advance(walk, len_this_page);

		@@ -99,7 +101,7 @@ void scatterwalk_copychunks(void buf, struct scatter_walk walk,
		buf += len_this_page;
		nbytes -= len_this_page;

		scatterwalk_pagedone(walk, out, 1);
		scatterwalk_pagedone(walk, out & 1, 1);
		}
		}
		EXPORT_SYMBOL_GPL(scatterwalk_copychunks);

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