From: Wen Gu <guwen@xxxxxxxxxxxxxxxxx> [ Upstream commit cf4f5530bb55ef7d5a91036b26676643b80b1616 ] The link_id is supposed to be unique, but smcr_next_link_id() doesn't skip the used link_id as expected. So the patch fixes this. Fixes: 026c381fb477 ("net/smc: introduce link_idx for link group array") Signed-off-by: Wen Gu <guwen@xxxxxxxxxxxxxxxxx> Reviewed-by: Tony Lu <tonylu@xxxxxxxxxxxxxxxxx> Acked-by: Karsten Graul <kgraul@xxxxxxxxxxxxx> Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- net/smc/smc_core.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/net/smc/smc_core.c b/net/smc/smc_core.c index c491dd8e67cda..109d790eaebe2 100644 --- a/net/smc/smc_core.c +++ b/net/smc/smc_core.c @@ -287,13 +287,14 @@ static u8 smcr_next_link_id(struct smc_link_group *lgr) int i; while (1) { +again: link_id = ++lgr->next_link_id; if (!link_id) /* skip zero as link_id */ link_id = ++lgr->next_link_id; for (i = 0; i < SMC_LINKS_PER_LGR_MAX; i++) { if (smc_link_usable(&lgr->lnk[i]) && lgr->lnk[i].link_id == link_id) - continue; + goto again; } break; } -- 2.33.0