A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-29 19:21:31 -04:00
Code Issues Projects Releases Packages Wiki Activity

crypto: atmel-aes - Reset the controller before each use

Browse source 
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 <[email protected]>
Signed-off-by: Herbert Xu <[email protected]>
This commit is contained in:
Romain Izard 2017-10-31 16:25:24 +01:00 • committed by Herbert Xu
commit 7a373fd74a
1 changed files with 3 additions and 7 deletions
Download patch file Download diff file Expand all files Collapse all files

10
drivers/crypto/atmel-aes.c
View file

@ -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;
}