From: John Crispin <john@phrozen.org>
Date: Thu, 7 Sep 2017 08:11:45 +0000 (+0200)
Subject: mediatek: fix mdio schedule while atomic error
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=23317f18bd485e821ca494a61dc09044b1d0e371;p=openwrt%2Fstaging%2Fjow.git

mediatek: fix mdio schedule while atomic error

Signed-off-by: John Crispin <john@phrozen.org>
---

diff --git a/target/linux/mediatek/patches-4.9/0062-mdio-atomic.patch b/target/linux/mediatek/patches-4.9/0062-mdio-atomic.patch
new file mode 100644
index 0000000000..040084d781
--- /dev/null
+++ b/target/linux/mediatek/patches-4.9/0062-mdio-atomic.patch
@@ -0,0 +1,16 @@
+Index: linux-4.9.47/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+===================================================================
+--- linux-4.9.47.orig/drivers/net/ethernet/mediatek/mtk_eth_soc.c
++++ linux-4.9.47/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+@@ -97,7 +97,10 @@ static int mtk_mdio_busy_wait(struct mtk
+ 			return 0;
+ 		if (time_after(jiffies, t_start + PHY_IAC_TIMEOUT))
+ 			break;
+-		usleep_range(10, 20);
++		if (in_atomic())
++			udelay(10);
++		else
++			usleep_range(10, 20);
+ 	}
+ 
+ 	dev_err(eth->dev, "mdio: MDIO timeout\n");