target/linux/mediatek/patches-4.4/0093-net-next-mediatek-remove-superfluous-register-reads.patch

   1 From 31428406bf4b9da2a322ae947096414ff0489fb5 Mon Sep 17 00:00:00 2001
   2 From: John Crispin <john@phrozen.org>
   3 Date: Tue, 3 May 2016 03:57:01 +0200
   4 Subject: [PATCH 093/102] net-next: mediatek: remove superfluous register
   5  reads
   6
   7 The driver was originally written for MIPS based SoC. These required the
   8 IRQ mask register to be read after writing it to ensure that the content
   9 was actually applied. As this version only works on ARM based SoC, we can
  10 safely remove the 2 reads as they ware not required.
  11
  12 Signed-off-by: Sean Wang <keyhaede@gmail.com>
  13 Signed-off-by: John Crispin <john@phrozen.org>
  14 ---
  15  drivers/net/ethernet/mediatek/mtk_eth_soc.c |    4 ----
  16  1 file changed, 4 deletions(-)
  17
  18 diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
  19 index a569c32..6a9fbde 100644
  20 --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
  21 +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
  22 @@ -335,8 +335,6 @@ static inline void mtk_irq_disable(struct mtk_eth *eth, u32 mask)
  23
  24         val = mtk_r32(eth, MTK_QDMA_INT_MASK);
  25         mtk_w32(eth, val & ~mask, MTK_QDMA_INT_MASK);
  26 -       /* flush write */
  27 -       mtk_r32(eth, MTK_QDMA_INT_MASK);
  28  }
  29
  30  static inline void mtk_irq_enable(struct mtk_eth *eth, u32 mask)
  31 @@ -345,8 +343,6 @@ static inline void mtk_irq_enable(struct mtk_eth *eth, u32 mask)
  32
  33         val = mtk_r32(eth, MTK_QDMA_INT_MASK);
  34         mtk_w32(eth, val | mask, MTK_QDMA_INT_MASK);
  35 -       /* flush write */
  36 -       mtk_r32(eth, MTK_QDMA_INT_MASK);
  37  }
  38
  39  static int mtk_set_mac_address(struct net_device *dev, void *p)
  40 --
  41 1.7.10.4
  42