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>
diff --git a/include/linux/ethtool.h b/include/linux/ethtool.h
index 886e127..de687a97 100644
--- a/include/linux/ethtool.h
+++ b/include/linux/ethtool.h
@@ -168,8 +168,8 @@
* @set_rxfh_indir: Set the contents of the RX flow hash indirection table.
* Will not be called if @get_rxfh_indir_size returns zero.
* @set_rxfh: Set the contents of the RX flow hash indirection table and/or
- * hash key. Either or both arguments may be %NULL if that attribute
- * is not to be changed.
+ * hash key. In case only the indirection table or hash key is to be
+ * changed, the other argument will be %NULL.
* Will only be called if one or both of @get_rxfh_indir_size and
* @get_rxfh_key_size are implemented and return non-zero.
* Returns a negative error code or zero.