net: davinci_emac: don't teardown inactive rx channel

Tearing down an unitialized rx channel causes a pending address hole
event to be queued. When booting linux it will report this pending
as something like "Address Hole seen by USB_OTG  at address 57fff584",
since u-boot did not handled this interrupt. Prevent that by not
tearing down the rx channel, when not receiving.

Signed-off-by: Jeroen Hofstee <jeroen@myspectrum.nl>

diff --git a/drivers/net/davinci_emac.c b/drivers/net/davinci_emac.c
index 427ad3e6facd9a2f31df7013597764f2877fb720..04447953c92f1efea7b4cc577e7c3c93debc352d 100644 (file)
--- a/drivers/net/davinci_emac.c
+++ b/drivers/net/davinci_emac.c
@@ -598,7 +598,8 @@ static void davinci_eth_close(struct eth_device *dev)
        debug_emac("+ emac_close\n");
 
        davinci_eth_ch_teardown(EMAC_CH_TX);    /* TX Channel teardown */
-       davinci_eth_ch_teardown(EMAC_CH_RX);    /* RX Channel teardown */
+       if (readl(&adap_emac->RXCONTROL) & 1)
+               davinci_eth_ch_teardown(EMAC_CH_RX); /* RX Channel teardown */
 
        /* Reset EMAC module and disable interrupts in wrapper */
        writel(1, &adap_emac->SOFTRESET);