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 --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
  19 +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
  20 @@ -335,8 +335,6 @@ static inline void mtk_irq_disable(struc
  21
  22         val = mtk_r32(eth, MTK_QDMA_INT_MASK);
  23         mtk_w32(eth, val & ~mask, MTK_QDMA_INT_MASK);
  24 -       /* flush write */
  25 -       mtk_r32(eth, MTK_QDMA_INT_MASK);
  26  }
  27
  28  static inline void mtk_irq_enable(struct mtk_eth *eth, u32 mask)
  29 @@ -345,8 +343,6 @@ static inline void mtk_irq_enable(struct
  30
  31         val = mtk_r32(eth, MTK_QDMA_INT_MASK);
  32         mtk_w32(eth, val | mask, MTK_QDMA_INT_MASK);
  33 -       /* flush write */
  34 -       mtk_r32(eth, MTK_QDMA_INT_MASK);
  35  }
  36
  37  static int mtk_set_mac_address(struct net_device *dev, void *p)