From: Wen Gu <guwen@linux.alibaba.com> mainline inclusion from mainline-v6.4-rc5 commit b24aa141c2ff26c919237aee61ea1818fc6780d9 category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/IC914B Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i... -------------------------------- When finding the first RMB of link group, it should start from the current RMB list whose index is 0. So fix it. Fixes: b4ba4652b3f8 ("net/smc: extend LLC layer for SMC-Rv2") Signed-off-by: Wen Gu <guwen@linux.alibaba.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Wang Liang <wangliang74@huawei.com> --- net/smc/smc_llc.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/net/smc/smc_llc.c b/net/smc/smc_llc.c index a7373593eb40..9a815af0c7d9 100644 --- a/net/smc/smc_llc.c +++ b/net/smc/smc_llc.c @@ -578,7 +578,10 @@ static struct smc_buf_desc *smc_llc_get_next_rmb(struct smc_link_group *lgr, { struct smc_buf_desc *buf_next; - if (!buf_pos || list_is_last(&buf_pos->list, &lgr->rmbs[*buf_lst])) { + if (!buf_pos) + return _smc_llc_get_next_rmb(lgr, buf_lst); + + if (list_is_last(&buf_pos->list, &lgr->rmbs[*buf_lst])) { (*buf_lst)++; return _smc_llc_get_next_rmb(lgr, buf_lst); } -- 2.34.1