From: Patrick McHardy <kaber@trash.net>
Date: Wed, 7 May 2008 14:32:28 +0000 (+0800)
Subject: [HIFN]: Handle ablkcipher_walk errors
X-Git-Tag: v2.6.27-rc1~1107^2~41
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=94eaa1bd7ca67e8f57919da96cbb41c215ef20cb;p=linux-2.6

[HIFN]: Handle ablkcipher_walk errors

ablkcipher_walk may return a negative error value, handle this properly
instead of treating it as a huge number of scatter-gather elements.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Acked-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
---

diff --git a/drivers/crypto/hifn_795x.c b/drivers/crypto/hifn_795x.c
index cce6e6f1ba..4e89cd8f66 100644
--- a/drivers/crypto/hifn_795x.c
+++ b/drivers/crypto/hifn_795x.c
@@ -1602,7 +1602,10 @@ static int hifn_setup_session(struct ablkcipher_request *req)
 	idx = 0;
 
 	sg_num = ablkcipher_walk(req, &ctx->walk);
-
+	if (sg_num < 0) {
+		err = sg_num;
+		goto err_out_exit;
+	}
 	atomic_set(&ctx->sg_num, sg_num);
 
 	spin_lock_irqsave(&dev->lock, flags);