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authorArthur Kiyanovski <akiyano@amazon.com>2020-05-03 09:52:10 +0000
committerDavid S. Miller <davem@davemloft.net>2020-05-03 15:59:29 -0700
commit80f8443fcdaa27871a233d08e9142612e6ade77c (patch)
tree5dabd3ebb42698edb8910ca8547df1b00f6917ad /drivers
parent5889a62b93bd577ace12adace5743e6929bd1dce (diff)
net: ena: avoid unnecessary admin command when RSS function set fails
Currently when ena_set_hash_function() fails the hash function is restored to the previous value by calling an admin command to get the hash function from the device. In this commit we avoid the admin command, by saving the previous hash function before calling ena_set_hash_function() and using this previous value to restore the hash function in case of failure of ena_set_hash_function(). Signed-off-by: Sameeh Jubran <sameehj@amazon.com> Signed-off-by: Arthur Kiyanovski <akiyano@amazon.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/net/ethernet/amazon/ena/ena_com.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/net/ethernet/amazon/ena/ena_com.c b/drivers/net/ethernet/amazon/ena/ena_com.c
index a250046b8e18..424ba08955e9 100644
--- a/drivers/net/ethernet/amazon/ena/ena_com.c
+++ b/drivers/net/ethernet/amazon/ena/ena_com.c
@@ -2286,6 +2286,7 @@ int ena_com_fill_hash_function(struct ena_com_dev *ena_dev,
struct ena_admin_get_feat_resp get_resp;
struct ena_admin_feature_rss_flow_hash_control *hash_key =
rss->hash_key;
+ enum ena_admin_hash_functions old_func;
int rc;
/* Make sure size is a mult of DWs */
@@ -2325,12 +2326,13 @@ int ena_com_fill_hash_function(struct ena_com_dev *ena_dev,
return -EINVAL;
}
+ old_func = rss->hash_func;
rss->hash_func = func;
rc = ena_com_set_hash_function(ena_dev);
/* Restore the old function */
if (unlikely(rc))
- ena_com_get_hash_function(ena_dev, NULL, NULL);
+ rss->hash_func = old_func;
return rc;
}