From: Roger Luethi <rl@hellgate.ch>

It looks like broken BIOSes controlling Rhine chips will remain in use in
significant numbers; such systems fail to come up via PXE after they have
been put into D3 (power-saving) mode.

This patch adds a module option for disabling the call that puts the chip
to sleep.  In addition, said workaround is automatically enabled for BIOSes
that have been reported as defective.

Signed-off-by: Roger Luethi <rl@hellgate.ch>
Signed-off-by: Andrew Morton <akpm@osdl.org>
---

 drivers/net/via-rhine.c |   36 +++++++++++++++++++++++++++++++++++-
 1 file changed, 35 insertions(+), 1 deletion(-)

diff -puN drivers/net/via-rhine.c~via-rhine-add-option-avoid_d3-work-around-broken-bioses-2 drivers/net/via-rhine.c
--- a/drivers/net/via-rhine.c~via-rhine-add-option-avoid_d3-work-around-broken-bioses-2
+++ a/drivers/net/via-rhine.c
@@ -44,6 +44,10 @@ static int max_interrupt_work = 20;
    Setting to > 1518 effectively disables this feature. */
 static int rx_copybreak;
 
+/* Work-around for broken BIOSes: they are unable to get the chip back out of
+   power state D3 so PXE booting fails. bootparam(7): via-rhine.avoid_D3=1 */
+static int avoid_D3;
+
 /*
  * In case you are looking for 'options[]' or 'full_duplex[]', they
  * are gone. Use ethtool(8) instead.
@@ -101,6 +105,7 @@ static const int multicast_filter_limit 
 #include <asm/io.h>
 #include <asm/irq.h>
 #include <asm/uaccess.h>
+#include <linux/dmi.h>
 
 /* These identify the driver base version and may not be removed. */
 static char version[] __devinitdata =
@@ -120,9 +125,11 @@ MODULE_LICENSE("GPL");
 module_param(max_interrupt_work, int, 0);
 module_param(debug, int, 0);
 module_param(rx_copybreak, int, 0);
+module_param(avoid_D3, bool, 0);
 MODULE_PARM_DESC(max_interrupt_work, "VIA Rhine maximum events handled per interrupt");
 MODULE_PARM_DESC(debug, "VIA Rhine debug level (0-7)");
 MODULE_PARM_DESC(rx_copybreak, "VIA Rhine copy breakpoint for copy-only-tiny-frames");
+MODULE_PARM_DESC(avoid_D3, "Avoid power state D3 (work-around for broken BIOSes)");
 
 /*
 		Theory of Operation
@@ -1911,7 +1918,8 @@ static void rhine_shutdown (struct pci_d
 	}
 
 	/* Hit power state D3 (sleep) */
-	iowrite8(ioread8(ioaddr + StickyHW) | 0x03, ioaddr + StickyHW);
+	if (!avoid_D3)
+		iowrite8(ioread8(ioaddr + StickyHW) | 0x03, ioaddr + StickyHW);
 
 	/* TODO: Check use of pci_enable_wake() */
 
@@ -1988,6 +1996,23 @@ static struct pci_driver rhine_driver = 
 	.shutdown =	rhine_shutdown,
 };
 
+static struct dmi_system_id __initdata rhine_dmi_table[] = {
+	{
+		.ident = "EPIA-M",
+		.matches = {
+			DMI_MATCH(DMI_BIOS_VENDOR, "Award Software International, Inc."),
+			DMI_MATCH(DMI_BIOS_VERSION, "6.00 PG"),
+		},
+	},
+	{
+		.ident = "KV7",
+		.matches = {
+			DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies, LTD"),
+			DMI_MATCH(DMI_BIOS_VERSION, "6.00 PG"),
+		},
+	},
+	{ NULL }
+};
 
 static int __init rhine_init(void)
 {
@@ -1995,6 +2020,15 @@ static int __init rhine_init(void)
 #ifdef MODULE
 	printk(version);
 #endif
+	if (dmi_check_system(rhine_dmi_table)) {
+		avoid_D3 = 1;
+		printk(KERN_WARNING "%s: Broken BIOS detected, avoid_D3 "
+				    "enabled.\n",
+		       DRV_NAME);
+	}
+	else if (avoid_D3)
+		printk(KERN_INFO "%s: avoid_D3 set.\n", DRV_NAME);
+
 	return pci_module_init(&rhine_driver);
 }
 
_