1 files changed, 15 insertions, 5 deletions

diff --git a/drivers/crypto/padlock-aes.c b/drivers/crypto/padlock-aes.c
index c33334ac987e..2f3ad3f7dfea 100644
--- a/drivers/crypto/padlock-aes.c
+++ b/drivers/crypto/padlock-aes.c
@@ -417,6 +417,11 @@ static int aes_set_key(struct crypto_tfm *tfm, const u8 *in_key,
 /* ====== Encryption/decryption routines ====== */
 
 /* These are the real call to PadLock. */
+static inline void padlock_reset_key(void)
+{
+        asm volatile ("pushfl; popfl");
+}
+
 static inline void padlock_xcrypt(const u8 *input, u8 *output, void *key,
                                   void *control_word)
 {
@@ -437,8 +442,6 @@ static void aes_crypt_copy(const u8 *in, u8 *out, u32 *key, struct cword *cword)
 static inline void aes_crypt(const u8 *in, u8 *out, u32 *key,
                              struct cword *cword)
 {
-        asm volatile ("pushfl; popfl");
-
         /* padlock_xcrypt requires at least two blocks of data. */
         if (unlikely(!(((unsigned long)in ^ (PAGE_SIZE - AES_BLOCK_SIZE)) &
                        (PAGE_SIZE - 1)))) {
@@ -457,7 +460,6 @@ static inline void padlock_xcrypt_ecb(const u8 *input, u8 *output, void *key,
                 return;
         }
 
-        asm volatile ("pushfl; popfl");         /* enforce key reload. */
         asm volatile ("test $1, %%cl;"
                       "je 1f;"
                       "lea -1(%%ecx), %%eax;"
@@ -474,8 +476,6 @@ static inline void padlock_xcrypt_ecb(const u8 *input, u8 *output, void *key,
 static inline u8 *padlock_xcrypt_cbc(const u8 *input, u8 *output, void *key,
                                      u8 *iv, void *control_word, u32 count)
 {
-        /* Enforce key reload. */
-        asm volatile ("pushfl; popfl");
         /* rep xcryptcbc */
         asm volatile (".byte 0xf3,0x0f,0xa7,0xd0"
                       : "+S" (input), "+D" (output), "+a" (iv)
@@ -486,12 +486,14 @@ static inline u8 *padlock_xcrypt_cbc(const u8 *input, u8 *output, void *key,
 static void aes_encrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
 {
         struct aes_ctx *ctx = aes_ctx(tfm);
+        padlock_reset_key();
         aes_crypt(in, out, ctx->E, &ctx->cword.encrypt);
 }
 
 static void aes_decrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
 {
         struct aes_ctx *ctx = aes_ctx(tfm);
+        padlock_reset_key();
         aes_crypt(in, out, ctx->D, &ctx->cword.decrypt);
 }
 
@@ -524,6 +526,8 @@ static int ecb_aes_encrypt(struct blkcipher_desc *desc,
         struct blkcipher_walk walk;
         int err;
 
+        padlock_reset_key();
+
         blkcipher_walk_init(&walk, dst, src, nbytes);
         err = blkcipher_walk_virt(desc, &walk);
 
@@ -546,6 +550,8 @@ static int ecb_aes_decrypt(struct blkcipher_desc *desc,
         struct blkcipher_walk walk;
         int err;
 
+        padlock_reset_key();
+
         blkcipher_walk_init(&walk, dst, src, nbytes);
         err = blkcipher_walk_virt(desc, &walk);
 
@@ -590,6 +596,8 @@ static int cbc_aes_encrypt(struct blkcipher_desc *desc,
         struct blkcipher_walk walk;
         int err;
 
+        padlock_reset_key();
+
         blkcipher_walk_init(&walk, dst, src, nbytes);
         err = blkcipher_walk_virt(desc, &walk);
 
@@ -614,6 +622,8 @@ static int cbc_aes_decrypt(struct blkcipher_desc *desc,
         struct blkcipher_walk walk;
         int err;
 
+        padlock_reset_key();
+
         blkcipher_walk_init(&walk, dst, src, nbytes);
         err = blkcipher_walk_virt(desc, &walk);