netdev - [net-next.git 3/3] stmmac: remove BUS_MODE

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Date:	Wed, 15 Oct 2014 10:25:31 +0200
From:	Giuseppe Cavallaro <peppe.cavallaro@...com>
To:	<netdev@...r.kernel.org>
Cc:	Giuseppe Cavallaro <peppe.cavallaro@...com>
Subject: [net-next.git 3/3] stmmac: remove BUS_MODE_DA

This is a very old and often unused option to configure
a bit in a register inside the DMA. This support should
not stay under Koption and also it is obsolete and should
be extended for new chips. This will be do later maybe via
device-tree parameters. Also no performance impact when
remove this setting on STi platforms.

Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@...com>
---
 drivers/net/ethernet/stmicro/stmmac/Kconfig        |   10 ----------
 .../net/ethernet/stmicro/stmmac/dwmac1000_dma.c    |    4 ----
 2 files changed, 0 insertions(+), 14 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/Kconfig b/drivers/net/ethernet/stmicro/stmmac/Kconfig
index af5228a..33b85ba 100644
--- a/drivers/net/ethernet/stmicro/stmmac/Kconfig
+++ b/drivers/net/ethernet/stmicro/stmmac/Kconfig
@@ -37,14 +37,4 @@ config STMMAC_PCI
 	  D1215994A VIRTEX FPGA board.
 
 	  If unsure, say N.
-
-config STMMAC_DA
-	bool "STMMAC DMA arbitration scheme"
-	default n
-	---help---
-	  Selecting this option, rx has priority over Tx (only for Giga
-	  Ethernet device).
-	  By default, the DMA arbitration scheme is based on Round-robin
-	  (rx:tx priority is 1:1).
-
 endif
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac1000_dma.c b/drivers/net/ethernet/stmicro/stmmac/dwmac1000_dma.c
index 0c2058a..59d92e8 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac1000_dma.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac1000_dma.c
@@ -70,10 +70,6 @@ static int dwmac1000_dma_init(void __iomem *ioaddr, int pbl, int fb, int mb,
 	if (mb)
 		value |= DMA_BUS_MODE_MB;
 
-#ifdef CONFIG_STMMAC_DA
-	value |= DMA_BUS_MODE_DA;	/* Rx has priority over tx */
-#endif
-
 	if (atds)
 		value |= DMA_BUS_MODE_ATDS;
 
-- 
1.7.4.4

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