From: Horia Geanta <horia.geanta@freescale.com>
Date: Fri, 11 Jul 2014 12:46:58 +0000 (+0300)
Subject: crypto: caam - set DK (Decrypt Key) bit only for AES accelerator
X-Git-Tag: v3.17-rc1~151^2~20
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=a60384dfff3df41e86431974e5f9807773332d9e;p=linux.git

crypto: caam - set DK (Decrypt Key) bit only for AES accelerator

AES currently shares descriptor creation functions with DES and 3DES.
DK bit is set in all cases, however it is valid only for
the AES accelerator.

Signed-off-by: Horia Geanta <horia.geanta@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
---

diff --git a/drivers/crypto/caam/caamalg.c b/drivers/crypto/caam/caamalg.c
index 694df4685920..a80ea853701d 100644
--- a/drivers/crypto/caam/caamalg.c
+++ b/drivers/crypto/caam/caamalg.c
@@ -97,6 +97,13 @@ static inline void append_dec_op1(u32 *desc, u32 type)
 {
 	u32 *jump_cmd, *uncond_jump_cmd;
 
+	/* DK bit is valid only for AES */
+	if ((type & OP_ALG_ALGSEL_MASK) != OP_ALG_ALGSEL_AES) {
+		append_operation(desc, type | OP_ALG_AS_INITFINAL |
+				 OP_ALG_DECRYPT);
+		return;
+	}
+
 	jump_cmd = append_jump(desc, JUMP_TEST_ALL | JUMP_COND_SHRD);
 	append_operation(desc, type | OP_ALG_AS_INITFINAL |
 			 OP_ALG_DECRYPT);