From 26a05489ee0eb2a69b729438e63b1038b472fa57 Mon Sep 17 00:00:00 2001 From: Joel Fernandes Date: Fri, 7 Mar 2014 10:28:46 -0600 Subject: [PATCH] crypto: omap-sham - Map SG pages if they are HIGHMEM before accessing HIGHMEM pages may not be mapped so we must kmap them before accessing. This resolves a random OOPs error that was showing up during OpenSSL SHA tests. Signed-off-by: Joel Fernandes Signed-off-by: Herbert Xu --- drivers/crypto/omap-sham.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/crypto/omap-sham.c b/drivers/crypto/omap-sham.c index 4e2067d..710d863 100644 --- a/drivers/crypto/omap-sham.c +++ b/drivers/crypto/omap-sham.c @@ -636,11 +636,17 @@ static size_t omap_sham_append_buffer(struct omap_sham_reqctx *ctx, static size_t omap_sham_append_sg(struct omap_sham_reqctx *ctx) { size_t count; + const u8 *vaddr; while (ctx->sg) { + vaddr = kmap_atomic(sg_page(ctx->sg)); + count = omap_sham_append_buffer(ctx, - sg_virt(ctx->sg) + ctx->offset, + vaddr + ctx->offset, ctx->sg->length - ctx->offset); + + kunmap_atomic((void *)vaddr); + if (!count) break; ctx->offset += count; -- 2.7.4