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crypto: omap-sham - fix unaligned sg list handling

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Currently the offset for unaligned sg lists is not handled properly
leading into wrong results with certain testmgr self tests. Fix the
handling to account for proper offset within the current sg list.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Tero Kristo 2019-11-05 16:01:07 +02:00 committed by Herbert Xu
parent 5d5f3eed29
commit 1cfd9f3f30
1 changed files with 14 additions and 5 deletions
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19
drivers/crypto/omap-sham.c
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@ -673,10 +673,10 @@ static int omap_sham_copy_sg_lists(struct omap_sham_reqctx *ctx,
while (sg && new_len) {
int len = sg->length - offset;
if (offset) {
if (len <= 0) {
offset -= sg->length;
if (offset < 0)
offset = 0;
sg = sg_next(sg);
continue;
}
if (new_len < len)
@ -684,7 +684,9 @@ static int omap_sham_copy_sg_lists(struct omap_sham_reqctx *ctx,
if (len > 0) {
new_len -= len;
sg_set_page(tmp, sg_page(sg), len, sg->offset);
sg_set_page(tmp, sg_page(sg), len, sg->offset + offset);
offset = 0;
ctx->offset = 0;
ctx->sg_len++;
if (new_len <= 0)
break;
@ -834,7 +836,14 @@ static int omap_sham_align_sgs(struct scatterlist *sg,
rctx->total = new_len;
rctx->offset += new_len;
rctx->sg_len = n;
rctx->sg = sg;
if (rctx->bufcnt) {
sg_init_table(rctx->sgl, 2);
sg_set_buf(rctx->sgl, rctx->dd->xmit_buf, rctx->bufcnt);
sg_chain(rctx->sgl, 2, sg);
rctx->sg = rctx->sgl;
} else {
rctx->sg = sg;
}
return 0;
}