Fix the following gcc warning:

drivers/rapidio/rio_cm.c:673:7: warning: variable ‘rc’ set but not used
[-Wunused-but-set-variable].

Reported-by: Abaci Robot <ab...@linux.alibaba.com>
Signed-off-by: Jiapeng Chong <jiapeng.ch...@linux.alibaba.com>
---
 drivers/rapidio/rio_cm.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/rapidio/rio_cm.c b/drivers/rapidio/rio_cm.c
index 50ec53d..c6fd181 100644
--- a/drivers/rapidio/rio_cm.c
+++ b/drivers/rapidio/rio_cm.c
@@ -670,13 +670,12 @@ static void rio_txcq_handler(struct cm_dev *cm, int slot)
         */
        if (!list_empty(&cm->tx_reqs) && (cm->tx_cnt < RIOCM_TX_RING_SIZE)) {
                struct tx_req *req, *_req;
-               int rc;
 
                list_for_each_entry_safe(req, _req, &cm->tx_reqs, node) {
                        list_del(&req->node);
                        cm->tx_buf[cm->tx_slot] = req->buffer;
-                       rc = rio_add_outb_message(cm->mport, req->rdev, cmbox,
-                                                 req->buffer, req->len);
+                       rio_add_outb_message(cm->mport, req->rdev, cmbox,
+                                            req->buffer, req->len);
                        kfree(req->buffer);
                        kfree(req);
 
-- 
1.8.3.1

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