aboutsummaryrefslogtreecommitdiffstats
path: root/target/linux/mediatek/patches-4.4/0093-net-next-mediatek-remove-superfluous-register-reads.patch
diff options
context:
space:
mode:
Diffstat (limited to 'target/linux/mediatek/patches-4.4/0093-net-next-mediatek-remove-superfluous-register-reads.patch')
-rw-r--r--target/linux/mediatek/patches-4.4/0093-net-next-mediatek-remove-superfluous-register-reads.patch42
1 files changed, 42 insertions, 0 deletions
diff --git a/target/linux/mediatek/patches-4.4/0093-net-next-mediatek-remove-superfluous-register-reads.patch b/target/linux/mediatek/patches-4.4/0093-net-next-mediatek-remove-superfluous-register-reads.patch
new file mode 100644
index 0000000000..a83d71362e
--- /dev/null
+++ b/target/linux/mediatek/patches-4.4/0093-net-next-mediatek-remove-superfluous-register-reads.patch
@@ -0,0 +1,42 @@
+From 31428406bf4b9da2a322ae947096414ff0489fb5 Mon Sep 17 00:00:00 2001
+From: John Crispin <john@phrozen.org>
+Date: Tue, 3 May 2016 03:57:01 +0200
+Subject: [PATCH 093/102] net-next: mediatek: remove superfluous register
+ reads
+
+The driver was originally written for MIPS based SoC. These required the
+IRQ mask register to be read after writing it to ensure that the content
+was actually applied. As this version only works on ARM based SoC, we can
+safely remove the 2 reads as they ware not required.
+
+Signed-off-by: Sean Wang <keyhaede@gmail.com>
+Signed-off-by: John Crispin <john@phrozen.org>
+---
+ drivers/net/ethernet/mediatek/mtk_eth_soc.c | 4 ----
+ 1 file changed, 4 deletions(-)
+
+diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+index a569c32..6a9fbde 100644
+--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
++++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+@@ -335,8 +335,6 @@ static inline void mtk_irq_disable(struct mtk_eth *eth, u32 mask)
+
+ val = mtk_r32(eth, MTK_QDMA_INT_MASK);
+ mtk_w32(eth, val & ~mask, MTK_QDMA_INT_MASK);
+- /* flush write */
+- mtk_r32(eth, MTK_QDMA_INT_MASK);
+ }
+
+ static inline void mtk_irq_enable(struct mtk_eth *eth, u32 mask)
+@@ -345,8 +343,6 @@ static inline void mtk_irq_enable(struct mtk_eth *eth, u32 mask)
+
+ val = mtk_r32(eth, MTK_QDMA_INT_MASK);
+ mtk_w32(eth, val | mask, MTK_QDMA_INT_MASK);
+- /* flush write */
+- mtk_r32(eth, MTK_QDMA_INT_MASK);
+ }
+
+ static int mtk_set_mac_address(struct net_device *dev, void *p)
+--
+1.7.10.4
+