From 26a05489ee0eb2a69b729438e63b1038b472fa57 Mon Sep 17 00:00:00 2001
From: Joel Fernandes <joelf@ti.com>
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 <joelf@ti.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
---
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 4e2067df300d..710d86386965 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;
--
2.34.1