Commit b933b4d9 authored by Roger Luethi's avatar Roger Luethi Committed by Jeff Garzik
Browse files

[PATCH] via-rhine: add option avoid_D3 (work around broken BIOSes) 



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.

Signed-off-by: default avatarRoger Luethi <rl@hellgate.ch>
Cc: Jeff Garzik <jgarzik@pobox.com>
Cc: Joerg Bashir <brak@archive.org>
Cc: Tim Phipps <tim@phipps-hutton.freeserve.co.uk>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
parent 76cb4fe7

drivers/net/via-rhine.c

+11 −1
Original line number Diff line number Diff line
@@ -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.
@@ -120,9 +124,11 @@ 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
@@ -823,6 +829,9 @@ static int __devinit rhine_init_one(struct pci_dev *pdev, 
		}

	}

	rp->mii_if.phy_id = phy_id;

	if (debug > 1 && avoid_D3)

		printk(KERN_INFO "%s: No D3 power state at shutdown.\n",

		       dev->name);



	return 0;
@@ -1911,6 +1920,7 @@ static void rhine_shutdown (struct pci_dev *pdev) 
	}



	/* Hit power state D3 (sleep) */

	if (!avoid_D3)

		iowrite8(ioread8(ioaddr + StickyHW) | 0x03, ioaddr + StickyHW);



	/* TODO: Check use of pci_enable_wake() */

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