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ixgbe: prep IPsec constants for later use 

Pull out a couple of values from a function so they can be used
later elsewhere.

Signed-off-by: Shannon Nelson <shannon.nelson@oracle.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Shannon Nelson 2018-08-13 11:43:39 -07:00 committed by Jeff Kirsher
parent b2875fbf6c
commit 99a7b0c14c
1 changed files with 5 additions and 3 deletions
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8
drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.c
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@ -5,6 +5,9 @@
#include <net/xfrm.h>
#include <crypto/aead.h>
#define IXGBE_IPSEC_KEY_BITS 160
static const char aes_gcm_name[] = "rfc4106(gcm(aes))";
/**
* ixgbe_ipsec_set_tx_sa - set the Tx SA registers
* @hw: hw specific details
@ -407,7 +410,6 @@ static int ixgbe_ipsec_parse_proto_keys(struct xfrm_state *xs,
struct net_device *dev = xs->xso.dev;
unsigned char *key_data;
char *alg_name = NULL;
const char aes_gcm_name[] = "rfc4106(gcm(aes))";
int key_len;
if (!xs->aead) {
@ -435,9 +437,9 @@ static int ixgbe_ipsec_parse_proto_keys(struct xfrm_state *xs,
* we don't need to do any byteswapping.
* 160 accounts for 16 byte key and 4 byte salt
*/
if (key_len == 160) {
if (key_len == IXGBE_IPSEC_KEY_BITS) {
*mysalt = ((u32 *)key_data)[4];
} else if (key_len != 128) {
} else if (key_len != (IXGBE_IPSEC_KEY_BITS - (sizeof(*mysalt) * 8))) {
netdev_err(dev, "IPsec hw offload only supports keys up to 128 bits with a 32 bit salt\n");
return -EINVAL;
} else {