netdev - [PATCH net-next] r8169: inline rtl8169_make_unusable_by

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Message-ID: <d5d0e0fa-8947-88b6-5d6a-9cd7f1bf274a@gmail.com>
Date:   Sun, 19 Apr 2020 23:16:55 +0200
From:   Heiner Kallweit <hkallweit1@...il.com>
To:     Realtek linux nic maintainers <nic_swsd@...ltek.com>,
        David Miller <davem@...emloft.net>
Cc:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: [PATCH net-next] r8169: inline rtl8169_make_unusable_by_asic

Inline rtl8169_make_unusable_by_asic() and simplify it:
- Address field doesn't need to be poisoned because descriptor is
  owned by CPU now
- desc->opts1 is set by rtl8169_mark_to_asic() and rtl8169_rx_fill(),
  therefore we don't have to preserve any field parts.

Signed-off-by: Heiner Kallweit <hkallweit1@...il.com>
---
 drivers/net/ethernet/realtek/r8169_main.c | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c
index e9be6d0e2..9b9b99799 100644
--- a/drivers/net/ethernet/realtek/r8169_main.c
+++ b/drivers/net/ethernet/realtek/r8169_main.c
@@ -3882,12 +3882,6 @@ static int rtl8169_change_mtu(struct net_device *dev, int new_mtu)
 	return 0;
 }
 
-static inline void rtl8169_make_unusable_by_asic(struct RxDesc *desc)
-{
-	desc->addr = cpu_to_le64(0x0badbadbadbadbadull);
-	desc->opts1 &= ~cpu_to_le32(DescOwn | RsvdMask);
-}
-
 static inline void rtl8169_mark_to_asic(struct RxDesc *desc)
 {
 	u32 eor = le32_to_cpu(desc->opts1) & RingEnd;
@@ -3933,7 +3927,8 @@ static void rtl8169_rx_clear(struct rtl8169_private *tp)
 			       R8169_RX_BUF_SIZE, DMA_FROM_DEVICE);
 		__free_pages(tp->Rx_databuff[i], get_order(R8169_RX_BUF_SIZE));
 		tp->Rx_databuff[i] = NULL;
-		rtl8169_make_unusable_by_asic(tp->RxDescArray + i);
+		tp->RxDescArray[i].addr = 0;
+		tp->RxDescArray[i].opts1 = 0;
 	}
 }
 
-- 
2.26.1