net/smc: Scan from current RMB list when no position specified

[ Upstream commit b24aa141c2ff26c919237aee61ea1818fc6780d9 ]

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: Sasha Levin <sashal@kernel.org>

diff --git a/net/smc/smc_llc.c b/net/smc/smc_llc.c
index 524649d..85af5bf 100644 (file)
--- 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);
        }