Subject: [PATCH 05/22] net: ethernet: ti: cpsw_ethtool: fix ethtool ring param set

From: Ivan Khoronzhuk <[email-masked]>
Date: Fri, 31 May 2019 16:47:25 +0300

[ Upstream commit 09faf5a7d7c0bcb07faba072f611937af9dd5788 ]

Fix ability to set RX descriptor number, the reason - initially
"tx_max_pending" was set incorrectly, but the issue appears after
adding sanity check, so fix is for "sanity" patch.

Fixes: 37e2d99b59c476 ("ethtool: Ensure new ring parameters are within bounds during SRINGPARAM")
Signed-off-by: Ivan Khoronzhuk <[email-masked]>
Reviewed-by: Grygorii Strashko <[email-masked]>
Signed-off-by: David S. Miller <[email-masked]>
---
 drivers/net/ethernet/ti/cpsw.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/ti/cpsw.c b/drivers/net/ethernet/ti/cpsw.c
index dd12b73a8853..1285f282d3ac 100644
--- a/drivers/net/ethernet/ti/cpsw.c
+++ b/drivers/net/ethernet/ti/cpsw.c
@@ -3130,6 +3130,7 @@ static void cpsw_get_ringparam(struct net_device *ndev,
 	struct cpsw_common *cpsw = priv->cpsw;
 
 	/* not supported */
+	ering->tx_max_pending = descs_pool_size - CPSW_MAX_QUEUES;
 	ering->tx_max_pending = 0;
 	ering->tx_pending = cpdma_get_num_tx_descs(cpsw->dma);
 	ering->rx_max_pending = descs_pool_size - CPSW_MAX_QUEUES;
-- 
2.20.1