From: Ralf Baechle <ralf@linux-mips.org>
To: Greg KH <greg@kroah.com>,
Ivan Kokshaysky <ink@jurassic.park.msu.ru>,
"David S. Miller" <davem@davemloft.net>,
rmk+lkml@arm.linux.org.uk, matthew@wil.cx,
grundler@parisc-linux.org, linux-pci@atrey.karlin.mff.cuni.cz,
linux-pm@lists.osdl.org, linux-kernel@vger.kernel.org,
ambx1@neo.rr.com
Subject: Re: [patch 2.6.13-rc3] pci: restore BAR values after D3hot->D0 for devices that need it
Date: Sun, 31 Jul 2005 20:36:53 +0100 [thread overview]
Message-ID: <20050731193653.GA4501@linux-mips.org> (raw)
In-Reply-To: <20050727141942.GB22686@tuxdriver.com>
On Wed, Jul 27, 2005 at 10:19:44AM -0400, John W. Linville wrote:
> Some PCI devices (e.g. 3c905B, 3c556B) lose all configuration
> (including BARs) when transitioning from D3hot->D0. This leaves such
> a device in an inaccessible state. The patch below causes the BARs
> to be restored when enabling such a device, so that its driver will
> be able to access it.
>
> The patch also adds pci_restore_bars as a new global symbol, and adds a
> correpsonding EXPORT_SYMBOL_GPL for that.
>
> Signed-off-by: John W. Linville <linville@tuxdriver.com>
> ---
> Some firmware (e.g. Thinkpad T21) leaves devices in D3hot after a
> (re)boot. Most drivers call pci_enable_device very early, so devices
> left in D3hot that lose configuration during the D3hot->D0 transition
> will be inaccessible to their drivers.
Tested with the 3com 3c556B Hurricane mini-PCI card in the IBM A21P. Without
this patch the 3c59x driver has not been able to read the MAC address of
the card's EEPROM with ACPI enabled, now it works with and without ACPI
support. This patch should settle at least some of the issues in
http://bugzilla.kernel.org/show_bug.cgi?id=1188.
Ralf
next prev parent reply other threads:[~2005-08-01 8:23 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-06-23 19:14 [RFC] firmware leaves device in D3hot at boot John W. Linville
2005-06-24 2:28 ` John W. Linville
2005-06-30 17:10 ` Greg KH
2005-07-01 1:41 ` John W. Linville
2005-07-01 2:26 ` [patch 2.6.12 (repost w/ corrected subject)] pci: restore BAR values in pci_enable_device_bars John W. Linville
2005-07-02 7:29 ` Grant Grundler
2005-07-02 8:09 ` Russell King
2005-07-05 20:05 ` Matthew Wilcox
2005-07-05 21:46 ` Russell King
2005-07-05 23:34 ` Ivan Kokshaysky
2005-07-06 7:46 ` Russell King
2005-07-08 0:57 ` John W. Linville
2005-07-08 0:59 ` [patch 2.6.13-rc2] pci: restore BAR values in pci_set_power_state for D3hot->D0 John W. Linville
2005-07-08 3:43 ` [linux-pm] " david-b
2005-07-08 12:37 ` John W. Linville
2005-07-08 3:11 ` [patch 2.6.12 (repost w/ corrected subject)] pci: restore BAR values in pci_enable_device_bars David S. Miller
2005-07-08 5:51 ` Ivan Kokshaysky
2005-07-08 6:35 ` David S. Miller
2005-07-08 7:03 ` Ivan Kokshaysky
2005-07-08 7:33 ` David S. Miller
2005-07-08 8:20 ` Ivan Kokshaysky
2005-07-08 18:34 ` [patch 2.6.13-rc2] pci: restore BAR values from pci_set_power_state for D3hot->D0 John W. Linville
2005-07-08 19:08 ` David S. Miller
2005-07-10 17:53 ` Ivan Kokshaysky
2005-07-11 12:48 ` Lennert Buytenhek
2005-07-11 13:15 ` John W. Linville
2005-07-11 13:19 ` [patch 2.6.13-rc2] PCI: Add symbol exports for pci_restore_bars John W. Linville
2005-07-11 17:18 ` Greg KH
2005-07-11 17:36 ` John W. Linville
2005-07-11 17:38 ` [patch 2.6.13-rc2] PCI: Add GPL symbol export " John W. Linville
2005-07-12 2:28 ` [patch 2.6.13-rc2] pci: restore BAR values from pci_set_power_state for D3hot->D0 Adam Belay
2005-07-13 17:34 ` John W. Linville
2005-07-26 23:49 ` Greg KH
2005-07-27 1:36 ` John W. Linville
2005-07-27 14:12 ` John W. Linville
2005-07-27 14:19 ` [patch 2.6.13-rc3] pci: restore BAR values after D3hot->D0 for devices that need it John W. Linville
2005-07-31 19:36 ` Ralf Baechle [this message]
2005-08-02 17:31 ` Greg KH
2005-08-02 16:41 ` Jesse Brandeburg
2005-09-14 13:52 ` [patch 2.6.14-rc1] pci: only call pci_restore_bars at boot John W. Linville
2005-09-14 15:08 ` Jeff Garzik
2005-09-14 16:26 ` David S. Miller
2005-09-14 16:47 ` John W. Linville
2005-09-14 18:22 ` Ivan Kokshaysky
2005-07-05 17:46 ` [patch 2.6.12 (repost w/ corrected subject)] pci: restore BAR values in pci_enable_device_bars John W. Linville
2005-07-18 12:17 ` Grant Grundler
2005-07-01 2:26 ` [patch 2.6.12] pci: restore BAR values in pci_enable_device John W. Linville
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