We usually allocate special values of u32 fields starting from the top down, so also change the value to 0xffffffff. As these operations haven't been included in a stable release yet, it's not too late to change.
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| @@ -850,7 +850,8 @@ struct ethtool_rxfh_indir { · 849 unmodified lines | ||
| 850 | 850 | * struct ethtool_rxfh - command to get/set RX flow hash indir or/and hash key. |
| 851 | 851 | * @cmd: Specific command number - %ETHTOOL_GRSSH or %ETHTOOL_SRSSH |
| 852 | 852 | * @rss_context: RSS context identifier. |
| 853 | − * @indir_size: On entry, the array size of the user buffer, which may be zero. | |
| 853 | + * @indir_size: On entry, the array size of the user buffer, which may be zero, | |
| 854 | + * or (for %ETHTOOL_SRSSH), %ETH_RXFH_INDIR_NO_CHANGE. | |
| 854 | 855 | * On return from %ETHTOOL_GRSSH, the array size of the hardware |
| 855 | 856 | * indirection table. |
| 856 | 857 | * @key_size: On entry, the array size of the user buffer in bytes, |
| @@ -861,10 +862,10 @@ struct ethtool_rxfh_indir { · 4 unmodified lines | ||
| 861 | 862 | * of size @indir_size followed by hash key of size @key_size. |
| 862 | 863 | * |
| 863 | 864 | * For %ETHTOOL_GRSSH, a @indir_size and key_size of zero means that only the |
| 864 | − * size should be returned. For %ETHTOOL_SRSSH, a @indir_size of 0xDEADBEEF | |
| 865 | − * means that indir table setting is not requested and a @indir_size of zero | |
| 866 | − * means the indir table should be reset to default values. This last feature | |
| 867 | − * is not supported by the original implementations. | |
| 865 | + * size should be returned. For %ETHTOOL_SRSSH, an @indir_size of | |
| 866 | + * %ETH_RXFH_INDIR_NO_CHANGE means that indir table setting is not requested | |
| 867 | + * and a @indir_size of zero means the indir table should be reset to default | |
| 868 | + * values. | |
| 868 | 869 | */ |
| 869 | 870 | struct ethtool_rxfh { |
| 870 | 871 | __u32 cmd; |
| @@ -874,6 +875,7 @@ struct ethtool_rxfh { · 3 unmodified lines | ||
| 874 | 875 | __u32 rsvd[2]; |
| 875 | 876 | __u32 rss_config[0]; |
| 876 | 877 | }; |
| 878 | +#define ETH_RXFH_INDIR_NO_CHANGE 0xffffffff | |
| 877 | 879 | |
| 878 | 880 | /** |
| 879 | 881 | * struct ethtool_rx_ntuple_flow_spec - specification for RX flow filter |