diff options
Diffstat (limited to 'drivers/crypto/inside-secure/safexcel_ring.c')
| -rw-r--r-- | drivers/crypto/inside-secure/safexcel_ring.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/crypto/inside-secure/safexcel_ring.c b/drivers/crypto/inside-secure/safexcel_ring.c index 2402a623759a..0f269b89cfd4 100644 --- a/drivers/crypto/inside-secure/safexcel_ring.c +++ b/drivers/crypto/inside-secure/safexcel_ring.c @@ -137,7 +137,13 @@ struct safexcel_command_desc *safexcel_add_cdesc(struct safexcel_crypto_priv *pr struct safexcel_token *token = (struct safexcel_token *)cdesc->control_data.token; - cdesc->control_data.packet_length = full_data_len; + /* + * Note that the length here MUST be >0 or else the EIP(1)97 + * may hang. Newer EIP197 firmware actually incorporates this + * fix already, but that doesn't help the EIP97 and we may + * also be running older firmware. + */ + cdesc->control_data.packet_length = full_data_len ?: 1; cdesc->control_data.options = EIP197_OPTION_MAGIC_VALUE | EIP197_OPTION_64BIT_CTX | EIP197_OPTION_CTX_CTRL_IN_CMD; |