From c2567f8ffa2704f6f2f81013e9a590deca5a865f Mon Sep 17 00:00:00 2001 From: Felix Beck Date: Wed, 5 Jan 2011 12:47:47 +0100 Subject: [S390] zcrypt: cope with cca restriction of cex3 The cca on the crypto adapter has a restriction in the size of the exponent if a key with a modulus bigger than 2048 bit is used. Thus in that case we have to avoid that the crypto device driver thinks the adapter is defect and sets it offline. Therfore a new member for the zcrypt_device struct called max_exp_bit_length is introduced. This will be set the first time the cca returns the error code function not implemented. If this is done with an adapter twice it will return -EINVAL. Signed-off-by: Felix Beck Signed-off-by: Martin Schwidefsky --- drivers/s390/crypto/zcrypt_pcica.c | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/s390/crypto/zcrypt_pcica.c') diff --git a/drivers/s390/crypto/zcrypt_pcica.c b/drivers/s390/crypto/zcrypt_pcica.c index 09e934b295a0..1afb69c75fea 100644 --- a/drivers/s390/crypto/zcrypt_pcica.c +++ b/drivers/s390/crypto/zcrypt_pcica.c @@ -373,6 +373,7 @@ static int zcrypt_pcica_probe(struct ap_device *ap_dev) zdev->min_mod_size = PCICA_MIN_MOD_SIZE; zdev->max_mod_size = PCICA_MAX_MOD_SIZE; zdev->speed_rating = PCICA_SPEED_RATING; + zdev->max_exp_bit_length = PCICA_MAX_MOD_SIZE; ap_dev->reply = &zdev->reply; ap_dev->private = zdev; rc = zcrypt_device_register(zdev); -- cgit v1.2.3