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net: Fix features skip in for_each_netdev_feature()

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[ 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: 3b89ea9c59 ("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>
This commit is contained in:
Tariq Toukan 2022-05-04 11:09:14 +03:00 committed by Greg Kroah-Hartman
parent c420d66047
commit e2cdde89d2
1 changed files with 2 additions and 2 deletions
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4
include/linux/netdev_features.h
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@ -158,7 +158,7 @@ enum {
#define NETIF_F_GSO_FRAGLIST __NETIF_F(GSO_FRAGLIST)
#define NETIF_F_HW_MACSEC __NETIF_F(HW_MACSEC)
/* 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)
{
@ -177,7 +177,7 @@ 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 */