From: Herbert Xu <herbert@gondor.apana.org.au>
Date: Sat, 31 Mar 2007 02:58:20 +0000 (+1000)
Subject: [CRYPTO] api: Flush the current page right than the next
X-Git-Tag: v2.6.21-rc6~40^2
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9f1167272890c210399e6b8a32d7cf7295713f5d;p=linux-2.6

[CRYPTO] api: Flush the current page right than the next

On platforms where flush_dcache_page is needed we're currently flushing
the next page right than the one we've just processed.  This patch fixes
the off-by-one error.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
---

diff --git a/crypto/scatterwalk.c b/crypto/scatterwalk.c
index 0f76175f62..81afd1790a 100644
--- a/crypto/scatterwalk.c
+++ b/crypto/scatterwalk.c
@@ -59,8 +59,12 @@ EXPORT_SYMBOL_GPL(scatterwalk_map);
 static void scatterwalk_pagedone(struct scatter_walk *walk, int out,
 				 unsigned int more)
 {
-	if (out)
-		flush_dcache_page(scatterwalk_page(walk));
+	if (out) {
+		struct page *page;
+
+		page = walk->sg->page + ((walk->offset - 1) >> PAGE_SHIFT);
+		flush_dcache_page(page);
+	}
 
 	if (more) {
 		walk->offset += PAGE_SIZE - 1;