de2104x: fix power management

[Ondrej Zary <linux@rainbow-software.org>]

At least my 21041 cards come out of suspend with bus mastering disabled so
they did not work after resume(no data transferred).
After adding pci_set_master(), the driver oopsed immediately on resume -
because de_clean_rings() is called on suspend but de_init_rings() call
was missing in resume.

Also disable link (reset SIA) before sleep (de4x5 does this too).

Signed-off-by: Ondrej Zary <linux@rainbow-software.org>

--- linux-2.6.36-rc3-/drivers/net/tulip/de2104x.c	2010-09-25 11:27:26.000000000 +0200
+++ linux-2.6.36-rc3/drivers/net/tulip/de2104x.c	2010-09-25 11:29:22.000000000 +0200
@@ -1231,6 +1231,7 @@ static void de_adapter_sleep (struct de_
 	if (de->de21040)
 		return;
 
+	dw32(CSR13, 0); /* Reset phy */
 	pci_read_config_dword(de->pdev, PCIPM, &pmctl);
 	pmctl |= PM_Sleep;
 	pci_write_config_dword(de->pdev, PCIPM, pmctl);
@@ -2166,6 +2167,8 @@ static int de_resume (struct pci_dev *pd
 		dev_err(&dev->dev, "pci_enable_device failed in resume\n");
 		goto out;
 	}
+	pci_set_master(pdev);
+	de_init_rings(de);
 	de_init_hw(de);
 out_attach:
 	netif_device_attach(dev);


-- 
Ondrej Zary