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authorBen Hutchings <ben@decadent.org.uk>2014-05-19 01:29:42 +0100
committerBen Hutchings <ben@decadent.org.uk>2014-05-19 01:29:42 +0100
commit61d88c6811f216de4ec26aafe24e650dc1aeb00e (patch)
tree4d5816d6ff92cecad8e3019d9d9653913970b6e9 /net/core/ethtool.c
parent678e30df2e5664619e06fcfea5490a476826d8fe (diff)
downloadlinux-61d88c6811f216de4ec26aafe24e650dc1aeb00e.tar.bz2
ethtool: Disallow ETHTOOL_SRSSH with both indir table and hash key unchanged
This would be a no-op, so there is no reason to request it. This also allows conversion of the current implementations of ethtool_ops::{get,set}_rxfh_indir to ethtool_ops::{get,set}_rxfh with no change other than their parameters. Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'net/core/ethtool.c')
-rw-r--r--net/core/ethtool.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/net/core/ethtool.c b/net/core/ethtool.c
index 7156fe5ca876..b8857348bdf3 100644
--- a/net/core/ethtool.c
+++ b/net/core/ethtool.c
@@ -802,11 +802,14 @@ static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev,
return -EFAULT;
/* If either indir or hash key is valid, proceed further.
+ * It is not valid to request that both be unchanged.
*/
if ((user_indir_size &&
user_indir_size != ETH_RXFH_INDIR_NO_CHANGE &&
user_indir_size != dev_indir_size) ||
- (user_key_size && (user_key_size != dev_key_size)))
+ (user_key_size && (user_key_size != dev_key_size)) ||
+ (user_indir_size == ETH_RXFH_INDIR_NO_CHANGE &&
+ user_key_size == 0))
return -EINVAL;
if (user_indir_size != ETH_RXFH_INDIR_NO_CHANGE)