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| author | Romain Izard <romain.izard.pro@gmail.com> | 2017-10-31 16:25:24 +0100 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2017-11-03 15:11:26 +0100 |
| commit | 7a373fd74a8d1c4882e0236cc38345cec1393505 (patch) | |
| tree | a9b3e7117c27d2dd7aaf7a744f0dc9821327c660 /drivers/crypto/atmel-aes.c | |
| parent | crypto: atmel-aes - properly set IV after {en,de}crypt (diff) | |
| download | linux-7a373fd74a8d1c4882e0236cc38345cec1393505.tar.xz linux-7a373fd74a8d1c4882e0236cc38345cec1393505.zip | |
crypto: atmel-aes - Reset the controller before each use
When using the rfc4543(gcm(aes))) mode, the registers of the hardware
engine are not empty after use. If the engine is not reset before its
next use, the following results will be invalid.
Always reset the hardware engine.
Signed-off-by: Romain Izard <romain.izard.pro@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto/atmel-aes.c')
| -rw-r--r-- | drivers/crypto/atmel-aes.c | 10 |
1 files changed, 3 insertions, 7 deletions
diff --git a/drivers/crypto/atmel-aes.c b/drivers/crypto/atmel-aes.c index 3f7b0966163c..0b49b6e9869a 100644 --- a/drivers/crypto/atmel-aes.c +++ b/drivers/crypto/atmel-aes.c @@ -77,12 +77,11 @@ AES_FLAGS_ENCRYPT | \ AES_FLAGS_GTAGEN) -#define AES_FLAGS_INIT BIT(2) #define AES_FLAGS_BUSY BIT(3) #define AES_FLAGS_DUMP_REG BIT(4) #define AES_FLAGS_OWN_SHA BIT(5) -#define AES_FLAGS_PERSISTENT (AES_FLAGS_INIT | AES_FLAGS_BUSY) +#define AES_FLAGS_PERSISTENT AES_FLAGS_BUSY #define ATMEL_AES_QUEUE_LENGTH 50 @@ -451,11 +450,8 @@ static int atmel_aes_hw_init(struct atmel_aes_dev *dd) if (err) return err; - if (!(dd->flags & AES_FLAGS_INIT)) { - atmel_aes_write(dd, AES_CR, AES_CR_SWRST); - atmel_aes_write(dd, AES_MR, 0xE << AES_MR_CKEY_OFFSET); - dd->flags |= AES_FLAGS_INIT; - } + atmel_aes_write(dd, AES_CR, AES_CR_SWRST); + atmel_aes_write(dd, AES_MR, 0xE << AES_MR_CKEY_OFFSET); return 0; } |