linux-kernel - Re: [PATCH] PCI: altera: use fwnode API for pci_msi_create_irq

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Date:	Wed, 04 Nov 2015 14:35:56 +0100
From:	Arnd Bergmann <arnd@...db.de>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	linux-pci@...r.kernel.org, Bjorn Helgaas <bhelgaas@...gle.com>,
	marc.zyngier@....com, linux-kernel@...r.kernel.org,
	Ley Foon Tan <lftan@...era.com>
Subject: Re: [PATCH] PCI: altera: use fwnode API for pci_msi_create_irq_domain

On Wednesday 04 November 2015 13:45:23 Thomas Gleixner wrote:
> On Wed, 4 Nov 2015, Arnd Bergmann wrote:
> > There is a new conflict between Thomas Gleixner's IRQ tree that contains
> > a patch from Marc Zyngier to change the prototype for
> > pci_msi_create_irq_domain, and Bjorn Helgaas' PCI tree that contains
> > a new driver for the Altera PCI MSI host, with the old interface,
> > as gcc now warns in linux-next:
> > 
> > drivers/pci/host/pcie-altera-msi.c: In function 'altera_allocate_domains':
> > drivers/pci/host/pcie-altera-msi.c:191:46: warning: passing argument 1 of 'pci_msi_create_irq_domain' from incompatible pointer type [-Wincompatible-pointer-types]
> >   msi->msi_domain = pci_msi_create_irq_domain(msi->pdev->dev.of_node,
> > include/linux/msi.h:286:20: note: expected 'struct fwnode_handle *' but argument is of type 'struct device_node *'
> > 
> > This changes the new driver use the modified API.
> > 
> > Signed-off-by: Arnd Bergmann <arnd@...db.de>
> > Fixes: af1169b48b17 ("PCI: altera: Add Altera PCIe MSI driver")
> > Fixes: be5436c83ac8 ("irqdomain/msi: Use fwnode instead of of_node")
> > ---
> > This conflict seems to be new in linux-next today. Any idea how to resolve it?
> > 
> > I think either Bjorn merges the msi-map-4.4 of git://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms and uses this
> > as the resolution, or whichever pull request comes second should let Linus
> > know about the conflict so he can do it when merging both.
> 
> The irq/core stuff which contains Marcs msi map stuff has hit Linus
> tree already.
> 

Ah, I see. Maybe that's why it showed up now, when Stephen had a fixup
for it in linux-next and that got dropped after the merge. I guess
Bjorn can pick either approach then, to get the correct merge done.

Thanks,

	Arnd
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