sfc: lower stack usage in efx_ethtool_self_test

drivers/net/sfc/ethtool.c: In function ‘efx_ethtool_self_test’:
drivers/net/sfc/ethtool.c:613: warning: the frame size of 1200 bytes
is larger than 1024 bytes

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Acked-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/sfc/ethtool.c b/drivers/net/sfc/ethtool.c
index 0e8bb19..ca886d9 100644 (file)
--- a/drivers/net/sfc/ethtool.c
+++ b/drivers/net/sfc/ethtool.c
@@ -569,9 +569,14 @@ static void efx_ethtool_self_test(struct net_device *net_dev,
                                  struct ethtool_test *test, u64 *data)
 {
        struct efx_nic *efx = netdev_priv(net_dev);
-       struct efx_self_tests efx_tests;
+       struct efx_self_tests *efx_tests;
        int already_up;
-       int rc;
+       int rc = -ENOMEM;
+
+       efx_tests = kzalloc(sizeof(*efx_tests), GFP_KERNEL);
+       if (!efx_tests)
+               goto fail;
+
 
        ASSERT_RTNL();
        if (efx->state != STATE_RUNNING) {
@@ -589,13 +594,11 @@ static void efx_ethtool_self_test(struct net_device *net_dev,
                if (rc) {
                        netif_err(efx, drv, efx->net_dev,
                                  "failed opening device.\n");
-                       goto fail2;
+                       goto fail1;
                }
        }
 
-       memset(&efx_tests, 0, sizeof(efx_tests));
-
-       rc = efx_selftest(efx, &efx_tests, test->flags);
+       rc = efx_selftest(efx, efx_tests, test->flags);
 
        if (!already_up)
                dev_close(efx->net_dev);
@@ -604,10 +607,11 @@ static void efx_ethtool_self_test(struct net_device *net_dev,
                   rc == 0 ? "passed" : "failed",
                   (test->flags & ETH_TEST_FL_OFFLINE) ? "off" : "on");
 
- fail2:
- fail1:
+fail1:
        /* Fill ethtool results structures */
-       efx_ethtool_fill_self_tests(efx, &efx_tests, NULL, data);
+       efx_ethtool_fill_self_tests(efx, efx_tests, NULL, data);
+       kfree(efx_tests);
+fail:
        if (rc)
                test->flags |= ETH_TEST_FL_FAILED;
 }