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net: ena: fix error returning in ena_com_get_hash_function()

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[ Upstream commit e9a1de378d ]

In case the "func" parameter is NULL we now return "-EINVAL".
This shouldn't happen in general, but when it does happen, this is the
proper way to handle it.

We also check func for NULL in the beginning of the function, as there
is no reason to do all the work and realize in the end of the function
it was useless.

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Arthur Kiyanovski 2020-05-03 09:52:11 +00:00 committed by Greg Kroah-Hartman
parent 79165d0335
commit 8ae0b5d2a1
1 changed files with 4 additions and 2 deletions
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6
drivers/net/ethernet/amazon/ena/ena_com.c
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@ -2137,6 +2137,9 @@ int ena_com_get_hash_function(struct ena_com_dev *ena_dev,
rss->hash_key;
int rc;
if (unlikely(!func))
return -EINVAL;
rc = ena_com_get_feature_ex(ena_dev, &get_resp,
ENA_ADMIN_RSS_HASH_FUNCTION,
rss->hash_key_dma_addr,
@ -2149,8 +2152,7 @@ int ena_com_get_hash_function(struct ena_com_dev *ena_dev,
if (rss->hash_func)
rss->hash_func--;
if (func)
*func = rss->hash_func;
*func = rss->hash_func;
if (key)
memcpy(key, hash_key->key, (size_t)(hash_key->keys_num) << 2);