rds: prevent BUG_ON triggering on congestion map updates

[platform/adaptation/renesas_rcar/renesas_kernel.git] / net / rds / ib_send.c

diff --git a/net/rds/ib_send.c b/net/rds/ib_send.c
index 71f373c..c47a511 100644 (file)
--- a/net/rds/ib_send.c
+++ b/net/rds/ib_send.c
@@ -551,7 +551,10 @@ int rds_ib_xmit(struct rds_connection *conn, struct rds_message *rm,
        if (conn->c_loopback
            && rm->m_inc.i_hdr.h_flags & RDS_FLAG_CONG_BITMAP) {
                rds_cong_map_updated(conn->c_fcong, ~(u64) 0);
-               return sizeof(struct rds_header) + RDS_CONG_MAP_BYTES;
+               scat = &rm->data.op_sg[sg];
+               ret = sizeof(struct rds_header) + RDS_CONG_MAP_BYTES;
+               ret = min_t(int, ret, scat->length - conn->c_xmit_data_off);
+               return ret;
        }
 
        /* FIXME we may overallocate here */