Messages in this thread | | | From | Rob Herring <> | Date | Wed, 11 Mar 2015 07:35:45 -0500 | Subject | Re: [PATCH] pci: of : fix BUG: unable to handle kernel |
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On Tue, Mar 10, 2015 at 10:25 AM, Murali Karicheri <m-karicheri2@ti.com> wrote: > On some platforms such as that based on x86, ia64 etc, root bus is > created with parent node passed in as NULL to pci_create_root_bus(). > On these platforms, the patch series "PCI: get DMA configuration from > parent device" when applied causes kernel crash. So add a check for this > in of_pci_dma_configure()
Wouldn't these arches have OF disabled and call an empty function? Regardless, we still need this.
> Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
I'm assuming Bjorn will apply this.
Acked-by: Rob Herring <robh@kernel.org>
> --- > drivers/of/of_pci.c | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/drivers/of/of_pci.c b/drivers/of/of_pci.c > index 86d3c38..a8e485c 100644 > --- a/drivers/of/of_pci.c > +++ b/drivers/of/of_pci.c > @@ -129,6 +129,10 @@ void of_pci_dma_configure(struct pci_dev *pci_dev) > struct device *dev = &pci_dev->dev; > struct device *bridge = pci_get_host_bridge_device(pci_dev); > > + /* Some platforms can have bridge->parent set to NULL */ > + if (!bridge->parent) > + return; > + > of_dma_configure(dev, bridge->parent->of_node); > pci_put_host_bridge_device(bridge); > } > -- > 1.7.9.5 >
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