From: Felix Fietkau <nbd@openwrt.org>
Date: Sun, 29 Nov 2009 13:38:03 +0000 (+0000)
Subject: ar71xx: mask out reserved bits from the dma tx status in the ethernet driver
X-Git-Tag: v19.07.0-rc1~32422
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=cb85dcb1a8fd1c63e680b3fa0a768b017081af20;p=openwrt%2Fstaging%2Fhauke.git

ar71xx: mask out reserved bits from the dma tx status in the ethernet driver

SVN-Revision: 18599
---

diff --git a/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_main.c b/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_main.c
index 57f6b34d6b..94420477c1 100644
--- a/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_main.c
+++ b/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_main.c
@@ -318,6 +318,7 @@ static void ag71xx_hw_set_macaddr(struct ag71xx *ag, unsigned char *mac)
 
 static void ag71xx_dma_reset(struct ag71xx *ag)
 {
+	u32 val;
 	int i;
 
 	ag71xx_dump_dma_regs(ag);
@@ -340,13 +341,19 @@ static void ag71xx_dma_reset(struct ag71xx *ag)
 	ag71xx_wr(ag, AG71XX_REG_RX_STATUS, RX_STATUS_BE | RX_STATUS_OF);
 	ag71xx_wr(ag, AG71XX_REG_TX_STATUS, TX_STATUS_BE | TX_STATUS_UR);
 
-	if (ag71xx_rr(ag, AG71XX_REG_RX_STATUS))
-		printk(KERN_ALERT "%s: unable to clear DMA Rx status\n",
-			ag->dev->name);
+	val = ag71xx_rr(ag, AG71XX_REG_RX_STATUS);
+	if (val)
+		printk(KERN_ALERT "%s: unable to clear DMA Rx status: %08x\n",
+			ag->dev->name, val);
 
-	if (ag71xx_rr(ag, AG71XX_REG_TX_STATUS))
-		printk(KERN_ALERT "%s: unable to clear DMA Tx status\n",
-			ag->dev->name);
+	val = ag71xx_rr(ag, AG71XX_REG_TX_STATUS);
+
+	/* mask out reserved bits */
+	val &= ~0xff000000;
+
+	if (val)
+		printk(KERN_ALERT "%s: unable to clear DMA Tx status: %08x\n",
+			ag->dev->name, val);
 
 	ag71xx_dump_dma_regs(ag);
 }