From: Alex Sidorenko Date: Fri, 7 Oct 2016 13:02:33 +0000 (-0400) Subject: Fixing a bug in team driver due to incorrect 'unsigned int' to 'int' conversion X-Git-Tag: v4.9-rc1~49^2~6 X-Git-Url: http://git.cascardo.info/?p=cascardo%2Flinux.git;a=commitdiff_plain;h=21d9629a7abd87512d062fbe57b04a1baedf93d2;hp=7d3cfc36ec3aae1d37a13fbe257f31141eb772b4 Fixing a bug in team driver due to incorrect 'unsigned int' to 'int' conversion Roundrobin runner of team driver uses 'unsigned int' variable to count the number of sent_packets. Later it is passed to a subroutine team_num_to_port_index(struct team *team, int num) as 'num' and when we reach MAXINT (2**31-1), 'num' becomes negative. This leads to using incorrect hash-bucket for port lookup and as a result, packets are dropped. The fix consists of changing 'int num' to 'unsigned int num'. Testing of a fixed kernel shows that there is no packet drop anymore. Signed-off-by: Alex Sidorenko Signed-off-by: David S. Miller --- diff --git a/include/linux/if_team.h b/include/linux/if_team.h index 174f43f43aff..c05216a8fbac 100644 --- a/include/linux/if_team.h +++ b/include/linux/if_team.h @@ -245,7 +245,7 @@ static inline struct team_port *team_get_port_by_index(struct team *team, return NULL; } -static inline int team_num_to_port_index(struct team *team, int num) +static inline int team_num_to_port_index(struct team *team, unsigned int num) { int en_port_count = ACCESS_ONCE(team->en_port_count);