Commit 0f2c8319 authored by Herbert Xu's avatar Herbert Xu
Browse files

crypto: rsa-pkcs1pad - Remove bogus page splitting 



The helper pkcs1pad_sg_set_buf tries to split a buffer that crosses
a page boundary into two SG entries.  This is unnecessary.  This
patch removes that.

Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent c0d20d22

crypto/rsa-pkcs1pad.c

+5 −14
Original line number Diff line number Diff line
@@ -103,7 +103,7 @@ struct pkcs1pad_inst_ctx { 
struct pkcs1pad_request {

	struct akcipher_request child_req;



	struct scatterlist in_sg[3], out_sg[2];

	struct scatterlist in_sg[2], out_sg[1];

	uint8_t *in_buf, *out_buf;

};
@@ -163,19 +163,10 @@ static int pkcs1pad_get_max_size(struct crypto_akcipher *tfm) 
static void pkcs1pad_sg_set_buf(struct scatterlist *sg, void *buf, size_t len,

		struct scatterlist *next)

{

	int nsegs = next ? 1 : 0;

	int nsegs = next ? 2 : 1;



	if (offset_in_page(buf) + len <= PAGE_SIZE) {

		nsegs += 1;

	sg_init_table(sg, nsegs);

	sg_set_buf(sg, buf, len);

	} else {

		nsegs += 2;

		sg_init_table(sg, nsegs);

		sg_set_buf(sg + 0, buf, PAGE_SIZE - offset_in_page(buf));

		sg_set_buf(sg + 1, buf + PAGE_SIZE - offset_in_page(buf),

				offset_in_page(buf) + len - PAGE_SIZE);

	}



	if (next)

		sg_chain(sg, nsegs, next);