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

[openwrt.git] / target / linux / ar71xx / files / drivers / net / ag71xx / ag71xx_main.c

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 57f6b34..9442047 100644 (file)
--- 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);
 }