linux-kernel - Re: [PATCH 0/3] v4.4: Revert "PCI: Implement pcibios_alloc

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Date:	Mon, 18 Apr 2016 13:50:15 +0200
From:	Joerg Roedel <jroedel@...e.de>
To:	Bjorn Helgaas <helgaas@...nel.org>
Cc:	Bjorn Helgaas <bhelgaas@...gle.com>, stable@...r.kernel.org,
	ОлегМороз <oleg.moroz@....vniiem.ru>,
	"Rafael J. Wysocki" <rafael@...nel.org>, linux-pci@...r.kernel.org,
	linux-kernel@...r.kernel.org, Sunjin Yang <fan4326@...il.com>,
	Rob Groner <rgroner@....com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Jiang Liu <jiang.liu@...ux.intel.com>
Subject: Re: [PATCH 0/3] v4.4: Revert "PCI: Implement pcibios_alloc_irq() and

Hi Bjorn,

On Fri, Apr 15, 2016 at 10:08:21AM -0500, Bjorn Helgaas wrote:
> I assume you're thinking about doing pci_enable_resources() before
> the core calls the driver's probe method?  One question there is how
> we would deal with pci_enable_device_mem().  If the core calls
> pci_enable_resources(), it has to assume the driver requires all BARs,
> and there are quite a few drivers that don't need the I/O BARs.

Yes, I think that the problem might be fixed when the resources are
enabled during the pcibios-call.

What do you think of enabling the the resources at probe time for the
pcibios-call and disable them afterwards? Then the driver can re-enable
whatever it needs and keep the rest disabled.



	Joerg