[PATCH net-next 1/2] devlink: Enhance policy to validate eswitch mode value

[Parav Pandit]

Use range checking facility of nla_policy to validate eswitch mode input
attribute value is valid or not.

Signed-off-by: Parav Pandit <pa...@nvidia.com>
Reviewed-by: Jiri Pirko <j...@nvidia.com>
---
 net/core/devlink.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/core/devlink.c b/net/core/devlink.c
index 25dd9309e86f..4ecc68a9c7df 100644
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -7202,7 +7202,8 @@ static const struct nla_policy 
devlink_nl_policy[DEVLINK_ATTR_MAX + 1] = {
        [DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE] = { .type = NLA_U8 },
        [DEVLINK_ATTR_SB_THRESHOLD] = { .type = NLA_U32 },
        [DEVLINK_ATTR_SB_TC_INDEX] = { .type = NLA_U16 },
-       [DEVLINK_ATTR_ESWITCH_MODE] = { .type = NLA_U16 },
+       [DEVLINK_ATTR_ESWITCH_MODE] = NLA_POLICY_RANGE(NLA_U16, 
DEVLINK_ESWITCH_MODE_LEGACY,
+                                                      
DEVLINK_ESWITCH_MODE_SWITCHDEV),
        [DEVLINK_ATTR_ESWITCH_INLINE_MODE] = { .type = NLA_U8 },
        [DEVLINK_ATTR_ESWITCH_ENCAP_MODE] = { .type = NLA_U8 },
        [DEVLINK_ATTR_DPIPE_TABLE_NAME] = { .type = NLA_NUL_STRING },
-- 
2.26.2