From: Wen Gu guwen@linux.alibaba.com
[ 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@linux.alibaba.com Reviewed-by: Tony Lu tonylu@linux.alibaba.com Acked-by: Karsten Graul kgraul@linux.ibm.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org --- 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; }