linux-kernel - [PATCH 3.4 047/107] crypto: ixp4xx - Remove bogus BUG

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Message-Id: <1458115601-5762-47-git-send-email-lizf@kernel.org>
Date:	Wed, 16 Mar 2016 16:05:41 +0800
From:	lizf@...nel.org
To:	stable@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org,
	Herbert Xu <herbert@...dor.apana.org.au>,
	Zefan Li <lizefan@...wei.com>
Subject: [PATCH 3.4 047/107] crypto: ixp4xx - Remove bogus BUG_ON on scattered dst buffer

From: Herbert Xu <herbert@...dor.apana.org.au>

3.4.111-rc1 review patch.  If anyone has any objections, please let me know.

------------------


commit f898c522f0e9ac9f3177d0762b76e2ab2d2cf9c0 upstream.

This patch removes a bogus BUG_ON in the ablkcipher path that
triggers when the destination buffer is different from the source
buffer and is scattered.

Signed-off-by: Herbert Xu <herbert@...dor.apana.org.au>
Signed-off-by: Zefan Li <lizefan@...wei.com>
---
 drivers/crypto/ixp4xx_crypto.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/crypto/ixp4xx_crypto.c b/drivers/crypto/ixp4xx_crypto.c
index 8f3f74c..f731abc 100644
--- a/drivers/crypto/ixp4xx_crypto.c
+++ b/drivers/crypto/ixp4xx_crypto.c
@@ -915,7 +915,6 @@ static int ablk_perform(struct ablkcipher_request *req, int encrypt)
 		crypt->mode |= NPE_OP_NOT_IN_PLACE;
 		/* This was never tested by Intel
 		 * for more than one dst buffer, I think. */
-		BUG_ON(req->dst->length < nbytes);
 		req_ctx->dst = NULL;
 		if (!chainup_buffers(dev, req->dst, nbytes, &dst_hook,
 					flags, DMA_FROM_DEVICE))
-- 
1.9.1