Messages in this thread Patch in this message | | | Date | Tue, 19 Aug 2008 13:37:57 -0700 | From | Andrew Morton <> | Subject | Re: [PATCH] forcedeth: Fix kexec regression |
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On Tue, 19 Aug 2008 20:45:53 +0200 "Rafael J. Wysocki" <rjw@sisk.pl> wrote:
> From: Rafael J. Wysocki <rjw@sisk.pl> > > forcedeth: Fix kexec regression > > Fix regression tracked as > http://bugzilla.kernel.org/show_bug.cgi?id=11361 and > caused by commit f735a2a1a4f2a0f5cd823ce323e82675990469e2 > ("[netdrvr] forcedeth: setup wake-on-lan before shutting down") > that makes network adapters integrated into the NVidia > MCP55 chipsets fail to work in kexeced kernels. The problem appears > to be that if the adapter is put into D3_hot during ->shutdown(), > it cannot be brought back into D0 after kexec (ref. > http://marc.info/?l=linux-kernel&m=121900062814967&w=4). Therefore, > only put forcedeth into D3 during ->shutdown() if the system is to be > powered off. > > Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> > Tested-by: Yinghai Lu <yhlu.kernel@gmail.com> > --- > drivers/net/forcedeth.c | 8 +++++--- > 1 file changed, 5 insertions(+), 3 deletions(-) > > Index: linux-2.6/drivers/net/forcedeth.c > =================================================================== > --- linux-2.6.orig/drivers/net/forcedeth.c > +++ linux-2.6/drivers/net/forcedeth.c > @@ -5975,10 +5975,12 @@ static void nv_shutdown(struct pci_dev * > if (netif_running(dev)) > nv_close(dev); > > - pci_enable_wake(pdev, PCI_D3hot, np->wolenabled); > - pci_enable_wake(pdev, PCI_D3cold, np->wolenabled); > pci_disable_device(pdev); > - pci_set_power_state(pdev, PCI_D3hot); > + if (system_state == SYSTEM_POWER_OFF) { > + if (pci_enable_wake(pdev, PCI_D3cold, np->wolenabled)) > + pci_enable_wake(pdev, PCI_D3hot, np->wolenabled); > + pci_set_power_state(pdev, PCI_D3hot); > + } > } > #else > #define nv_suspend NULL
hm, I wonder if this has any relation to forcedeth-add-pci_enable_device-to-nv_resume.patch:
From: Simon Arlott <simon@fire.lp0.eu>
My NIC stops working after resuming from standby, it's not receiving any interrupts.
Commit 25d90810ff49d2a63475776f24c74c6bb49b045f ([netdrvr] forcedeth: reorder suspend/resume code) introduces pci_disable_device to nv_suspend, but there's no corresponding pci_enable_device in nv_resume - so I added one (copied from e1000). This results in interrupts being re-enabled after suspend.
However, the NIC (10de:0373) still doesn't work after resume.
Cc: Tobias Diedrich <ranma+kernel@tdiedrich.de> Cc: Jeff Garzik <jgarzik@redhat.com> Cc: Ayaz Abdulla <aabdulla@nvidia.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> ---
drivers/net/forcedeth.c | 7 +++++++ 1 file changed, 7 insertions(+)
diff -puN drivers/net/forcedeth.c~forcedeth-add-pci_enable_device-to-nv_resume drivers/net/forcedeth.c --- a/drivers/net/forcedeth.c~forcedeth-add-pci_enable_device-to-nv_resume +++ a/drivers/net/forcedeth.c @@ -5960,6 +5960,13 @@ static int nv_resume(struct pci_dev *pde pci_set_power_state(pdev, PCI_D0); pci_restore_state(pdev); + rc = pci_enable_device(pdev); + if (rc) { + printk(KERN_ERR "forcedeth: Cannot enable PCI device from suspend\n"); + return rc; + } + pci_set_master(pdev); + /* ack any pending wake events, disable PME */ pci_enable_wake(pdev, PCI_D0, 0); _
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