[PATCH net 1/2] net/stmmac: Apply TBS config only to used queues

[Jakub Raczynski <j.raczynski@samsung.com>]

While opening stmmac driver, there is enabling of TBS (Time-Based Scheduling)
option in dma config. Currently this is executed for all possible TX queues via
MTL_MAX_TX_QUEUES macro, but actual number of queues used might differ.
While setting this is generally harmless, since memory for MTL_MAX_TX_QUEUES
is allocated, it is incorrect, because it prepares config for unused queues.

Change this to apply tbs config only to tx_queues_to_use.

Fixes: 4896bb7c0b31a ("net: stmmac: do not clear TBS enable bit on link up/down")
Co-developed-by: Chang-Sub Lee <cs0617.lee@samsung.com>
Signed-off-by: Chang-Sub Lee <cs0617.lee@samsung.com>
Signed-off-by: Jakub Raczynski <j.raczynski@samsung.com>
---
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 3591755ea30b..5917bf47c7de 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -4140,7 +4140,7 @@ static int __stmmac_open(struct net_device *dev,
 	u8 chan;
 	int ret;
 
-	for (int i = 0; i < MTL_MAX_TX_QUEUES; i++)
+	for (int i = 0; i < priv->plat->tx_queues_to_use; i++)
 		if (priv->dma_conf.tx_queue[i].tbs & STMMAC_TBS_EN)
 			dma_conf->tx_queue[i].tbs = priv->dma_conf.tx_queue[i].tbs;
 	memcpy(&priv->dma_conf, dma_conf, sizeof(*dma_conf));
-- 
2.34.1