netdev - Re: [PATCH 5/7] pci: Export the pci_restore_msi

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Date:	Fri, 19 Oct 2007 17:36:17 -0700
From:	"Michael Chan" <mchan@...adcom.com>
To:	linas@...tin.ibm.com
cc:	"Matt Carlson" <mcarlson@...adcom.com>,
	"David Miller" <davem@...emloft.net>,
	"netdev" <netdev@...r.kernel.org>,
	linux-pci@...ey.karlin.mff.cuni.cz
Subject: Re: [PATCH 5/7] pci: Export the pci_restore_msi_state()
 function

On Fri, 2007-10-19 at 18:29 -0500, linas@...tin.ibm.com wrote:
> On Fri, Oct 19, 2007 at 02:36:56PM -0700, Matt Carlson wrote:
> > This patch exports the pci_restore_msi_state() function.  This function
> > is needed to restore the MSI state during PCI error recovery.
> > 
> > Signed-off-by: Linas Vepstas <linas@...tin.ibm.com>
> > Signed-off-by: Matt Carlson <mcarlson@...adcom.com>
> > Signed-off-by: Michael Chan <mchan@...adcom.com>
> 
> Davem,
> 
> This patch is generically needed for recovery from PCI errors, 
> and not just the tg3 that Matt is working on.
> 
> Matt, there are also several msi-related bugs in the pseries
> architecture implementation, those patches will go out to 
> Paul Mackerras seperately. I was hoping today ... but things 
> came up. One little iddy-biddy problem is that the pseries
> is not actually *saving* the msi state, and so, ahem, the 
> restore isn't quite working out either. I'm still trying
> to navigate around that.
> 
Linas, the MSI state is saved automatically when the driver calls
pci_enable_msi(), so it doesn't need to be saved by pseries code.

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