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| author | Roger Luethi <rl@hellgate.ch> | 2006-08-14 23:00:21 -0700 |
|---|---|---|
| committer | Jeff Garzik <jeff@garzik.org> | 2006-08-19 17:44:30 -0400 |
| commit | b933b4d93888b584eda826bffa68a3a1283f8411 (patch) | |
| tree | 3d1ac29f142f1248ec5e5aa9994545818ab0f301 /drivers/net | |
| parent | 76cb4fe7c0926c2c59f4a36ab169aa2d547c93d1 (diff) | |
| download | kernel_samsung_aries-b933b4d93888b584eda826bffa68a3a1283f8411.zip kernel_samsung_aries-b933b4d93888b584eda826bffa68a3a1283f8411.tar.gz kernel_samsung_aries-b933b4d93888b584eda826bffa68a3a1283f8411.tar.bz2 | |
[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: Roger 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: Andrew Morton <akpm@osdl.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/via-rhine.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/net/via-rhine.c b/drivers/net/via-rhine.c index fda367b..ae97108 100644 --- a/drivers/net/via-rhine.c +++ b/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. @@ -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; @@ -1911,7 +1920,8 @@ static void rhine_shutdown (struct pci_dev *pdev) } /* 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() */ |