From: Aaro Koskinen <aaro.koskinen@iki.fi>
Date: Wed, 31 Aug 2016 20:57:46 +0000 (+0300)
Subject: staging: octeon: prevent poll during rx init
X-Git-Tag: v4.9-rc1~119^2~762
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=d48f10fc616a82c8e761753fd6edf6b6f6b66bec;p=karo-tx-linux.git

staging: octeon: prevent poll during rx init

Prevent poll before the RX init has been completed.

Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/staging/octeon/ethernet-rx.c b/drivers/staging/octeon/ethernet-rx.c
index 4f32fa37d5de..ce1e2a321abb 100644
--- a/drivers/staging/octeon/ethernet-rx.c
+++ b/drivers/staging/octeon/ethernet-rx.c
@@ -43,6 +43,8 @@
 
 #include <asm/octeon/cvmx-gmxx-defs.h>
 
+static atomic_t oct_rx_ready = ATOMIC_INIT(0);
+
 static struct oct_rx_group {
 	int irq;
 	int group;
@@ -444,6 +446,9 @@ void cvm_oct_poll_controller(struct net_device *dev)
 {
 	int i;
 
+	if (!atomic_read(&oct_rx_ready))
+		return;
+
 	for (i = 0; i < ARRAY_SIZE(oct_rx_group); i++) {
 
 		if (!(pow_receive_groups & BIT(i)))
@@ -524,6 +529,7 @@ void cvm_oct_rx_initialize(void)
 		 */
 		napi_schedule(&oct_rx_group[i].napi);
 	}
+	atomic_inc(&oct_rx_ready);
 }
 
 void cvm_oct_rx_shutdown(void)