[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <alpine.DEB.2.11.1511231838130.3913@nanos>
Date: Mon, 23 Nov 2015 18:38:28 +0100 (CET)
From: Thomas Gleixner <tglx@...utronix.de>
To: Marc Zyngier <marc.zyngier@....com>
cc: Jiang Liu <jiang.liu@...ux.intel.com>,
Bjorn Helgaas <bhelgaas@...gle.com>,
Phil Edworthy <phil.edworthy@...esas.com>,
linux-kernel@...r.kernel.org, Wolfram Sang <wsa@...-dreams.de>
Subject: Re: [PATCH] PCI: MSI: Only use the generic MSI layer when domain is
hierarchical
On Mon, 23 Nov 2015, Marc Zyngier wrote:
> Since d8a1cb757550 ("PCI/MSI: Let pci_msi_get_domain use struct
> device::msi_domain"), we use the MSI domain associated to the PCI device.
>
> But finding a MSI domain doesn't mean that the domain is implemented
> using the generic MSI domain API, and a number of MSI controllers
> are still using the arch_setup_msi_irq/arch_teardown_msi_irqs.
>
> In order to avoid a firework on these systems, check that the domain
> we just obtained is hierarchical. If not, don't use the generic MSI
> stuff and stick with the old one. Not pretty, but reliable.
>
> Another insentive to rework those drivers and phase out this API.
>
> Reported-by: Phil Edworthy <phil.edworthy@...esas.com>
> Tested-by: Phil Edworthy <phil.edworthy@...esas.com>
> Signed-off-by: Marc Zyngier <marc.zyngier@....com>
Acked-by: Thomas Gleixner <tglx@...utronix.de>
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists