net: ep93xx_eth: Do not crash unloading module

[pandora-kernel.git] / drivers / net / ethernet / cirrus / ep93xx_eth.c

diff --git a/drivers/net/ethernet/cirrus/ep93xx_eth.c b/drivers/net/ethernet/cirrus/ep93xx_eth.c
index 4317af8..6c9bd55 100644 (file)
--- a/drivers/net/ethernet/cirrus/ep93xx_eth.c
+++ b/drivers/net/ethernet/cirrus/ep93xx_eth.c
@@ -469,6 +469,9 @@ static void ep93xx_free_buffers(struct ep93xx_priv *ep)
        struct device *dev = ep->dev->dev.parent;
        int i;
 
+       if (!ep->descs)
+               return;
+
        for (i = 0; i < RX_QUEUE_ENTRIES; i++) {
                dma_addr_t d;
 
@@ -493,6 +496,7 @@ static void ep93xx_free_buffers(struct ep93xx_priv *ep)
 
        dma_free_coherent(dev, sizeof(struct ep93xx_descs), ep->descs,
                                                        ep->descs_dma_addr);
+       ep->descs = NULL;
 }
 
 static int ep93xx_alloc_buffers(struct ep93xx_priv *ep)