diff options
Diffstat (limited to 'target/linux/mediatek/patches-4.4/0087-net-next-mediatek-add-IRQ-locking.patch')
| -rw-r--r-- | target/linux/mediatek/patches-4.4/0087-net-next-mediatek-add-IRQ-locking.patch | 74 |
1 files changed, 0 insertions, 74 deletions
diff --git a/target/linux/mediatek/patches-4.4/0087-net-next-mediatek-add-IRQ-locking.patch b/target/linux/mediatek/patches-4.4/0087-net-next-mediatek-add-IRQ-locking.patch deleted file mode 100644 index 7278d83285..0000000000 --- a/target/linux/mediatek/patches-4.4/0087-net-next-mediatek-add-IRQ-locking.patch +++ /dev/null @@ -1,74 +0,0 @@ -From 4ff9304355036d4a00bdf0e47e869fc770ba1cc5 Mon Sep 17 00:00:00 2001 -From: John Crispin <blogic@openwrt.org> -Date: Wed, 20 Apr 2016 16:18:07 +0200 -Subject: [PATCH 87/91] net-next: mediatek: add IRQ locking - -The code that enables and disables IRQs is missing proper locking. After -adding the IRQ separation patch and routing the putting the RX and TX IRQs -on different cores we experienced IRQ stalls. Fix this by adding proper -locking. We use a dedicated lock to reduce the latency if the IRQ code. -Otherwise it might wait for bottom code to finish before reenabling or -disabling IRQs. - -Signed-off-by: John Crispin <blogic@openwrt.org> ---- - drivers/net/ethernet/mediatek/mtk_eth_soc.c | 7 +++++++ - drivers/net/ethernet/mediatek/mtk_eth_soc.h | 1 + - 2 files changed, 8 insertions(+) - -diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c -index 24a4179..f86d551 100644 ---- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c -+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c -@@ -316,22 +316,28 @@ static void mtk_mdio_cleanup(struct mtk_eth *eth) - - static inline void mtk_irq_disable(struct mtk_eth *eth, u32 mask) - { -+ unsigned long flags; - u32 val; - -+ spin_lock_irqsave(ð->irq_lock, flags); - 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); -+ spin_unlock_irqrestore(ð->irq_lock, flags); - } - - static inline void mtk_irq_enable(struct mtk_eth *eth, u32 mask) - { -+ unsigned long flags; - u32 val; - -+ spin_lock_irqsave(ð->irq_lock, flags); - 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); -+ spin_unlock_irqrestore(ð->irq_lock, flags); - } - - static int mtk_set_mac_address(struct net_device *dev, void *p) -@@ -1752,6 +1758,7 @@ static int mtk_probe(struct platform_device *pdev) - return -EADDRNOTAVAIL; - - spin_lock_init(ð->page_lock); -+ spin_lock_init(ð->irq_lock); - - eth->ethsys = syscon_regmap_lookup_by_phandle(pdev->dev.of_node, - "mediatek,ethsys"); -diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.h b/drivers/net/ethernet/mediatek/mtk_eth_soc.h -index 57f7e8a..8220275 100644 ---- a/drivers/net/ethernet/mediatek/mtk_eth_soc.h -+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.h -@@ -372,6 +372,7 @@ struct mtk_eth { - void __iomem *base; - struct reset_control *rstc; - spinlock_t page_lock; -+ spinlock_t irq_lock; - struct net_device dummy_dev; - struct net_device *netdev[MTK_MAX_DEVS]; - struct mtk_mac *mac[MTK_MAX_DEVS]; --- -1.7.10.4 - |