From: Tariq Toukan tariqt@nvidia.com
[ Upstream commit 85db6352fc8a158a893151baa1716463d34a20d0 ]
The find_next_netdev_feature() macro gets the "remaining length", not bit index. Passing "bit - 1" for the following iteration is wrong as it skips the adjacent bit. Pass "bit" instead.
Fixes: 3b89ea9c5902 ("net: Fix for_each_netdev_feature on Big endian") Signed-off-by: Tariq Toukan tariqt@nvidia.com Reviewed-by: Gal Pressman gal@nvidia.com Link: https://lore.kernel.org/r/20220504080914.1918-1-tariqt@nvidia.com Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- include/linux/netdev_features.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/include/linux/netdev_features.h b/include/linux/netdev_features.h index de123f436f1a..3a308bf98fc3 100644 --- a/include/linux/netdev_features.h +++ b/include/linux/netdev_features.h @@ -145,7 +145,7 @@ enum { #define NETIF_F_HW_ESP_TX_CSUM __NETIF_F(HW_ESP_TX_CSUM) #define NETIF_F_RX_UDP_TUNNEL_PORT __NETIF_F(RX_UDP_TUNNEL_PORT)
-/* Finds the next feature with the highest number of the range of start till 0. +/* Finds the next feature with the highest number of the range of start-1 till 0. */ static inline int find_next_netdev_feature(u64 feature, unsigned long start) { @@ -164,7 +164,7 @@ static inline int find_next_netdev_feature(u64 feature, unsigned long start) for ((bit) = find_next_netdev_feature((mask_addr), \ NETDEV_FEATURE_COUNT); \ (bit) >= 0; \ - (bit) = find_next_netdev_feature((mask_addr), (bit) - 1)) + (bit) = find_next_netdev_feature((mask_addr), (bit)))
/* Features valid for ethtool to change */ /* = all defined minus driver/device-class-related */