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authorFelix Beck <felix.beck@de.ibm.com>2011-01-05 12:47:47 +0100
committerMartin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com>2011-01-05 12:47:27 +0100
commitc2567f8ffa2704f6f2f81013e9a590deca5a865f (patch)
tree83c71b7139d21b51166f085f08bcefcaaa808b93 /drivers/s390/crypto/zcrypt_api.h
parent2ade1fab026b4a103f0105ec4b47654fc2f729c7 (diff)
[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 <felix.beck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/crypto/zcrypt_api.h')
-rw-r--r--drivers/s390/crypto/zcrypt_api.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/s390/crypto/zcrypt_api.h b/drivers/s390/crypto/zcrypt_api.h
index 8e7ffbf2466..88ebd114735 100644
--- a/drivers/s390/crypto/zcrypt_api.h
+++ b/drivers/s390/crypto/zcrypt_api.h
@@ -109,6 +109,7 @@ struct zcrypt_device {
int request_count; /* # current requests. */
struct ap_message reply; /* Per-device reply structure. */
+ int max_exp_bit_length;
};
struct zcrypt_device *zcrypt_device_alloc(size_t);