netdev - [PATCH v2 44/50] wilc1000: don't allocate tx

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Date:   Thu, 23 Dec 2021 01:14:07 +0000 (UTC)
From:   David Mosberger-Tang <davidm@...uge.net>
To:     Ajay Singh <ajay.kathat@...rochip.com>
Cc:     Claudiu Beznea <claudiu.beznea@...rochip.com>,
        Kalle Valo <kvalo@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        David Mosberger-Tang <davidm@...uge.net>
Subject: [PATCH v2 44/50] wilc1000: don't allocate tx_buffer when zero-copy is
 available

If a driver supports zero-copy transmit transfers, there is no need to
have a transmit buffer.

Signed-off-by: David Mosberger-Tang <davidm@...uge.net>
---
 drivers/net/wireless/microchip/wilc1000/wlan.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/net/wireless/microchip/wilc1000/wlan.c b/drivers/net/wireless/microchip/wilc1000/wlan.c
index d96a7e2a0bd59..d46d6e8122c8d 100644
--- a/drivers/net/wireless/microchip/wilc1000/wlan.c
+++ b/drivers/net/wireless/microchip/wilc1000/wlan.c
@@ -1604,12 +1604,12 @@ int wilc_wlan_init(struct net_device *dev)
 
 	init_q_limits(wilc);
 
-	if (!wilc->tx_buffer)
+	if (!wilc->hif_func->hif_sk_buffs_tx && !wilc->tx_buffer) {
 		wilc->tx_buffer = kmalloc(WILC_TX_BUFF_SIZE, GFP_KERNEL);
-
-	if (!wilc->tx_buffer) {
-		ret = -ENOBUFS;
-		goto fail;
+		if (!wilc->tx_buffer) {
+			ret = -ENOBUFS;
+			goto fail;
+		}
 	}
 
 	if (!wilc->rx_buffer)
-- 
2.25.1