From: Murali Karicheri <m-karicheri2@ti.com> To: <grant.likely@linaro.org>, <robh+dt@kernel.org>, <devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org>, <linux-pci@vger.kernel.org>, <bhelgaas@google.com>, <arnd@arndb.de>, <Suravee.Suthikulpanit@amd.com>, <will.deacon@arm.com>, <joro@8bytes.org>, <linux@arm.linux.org.uk> Cc: Murali Karicheri <m-karicheri2@ti.com> Subject: [PATCH v1] of/pci : fix of_pci_dma_configure parent ptr NULL Date: Wed, 11 Mar 2015 12:40:03 -0400 [thread overview] Message-ID: <1426092003-16925-1-git-send-email-m-karicheri2@ti.com> (raw) 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() Signed-off-by: Murali Karicheri <m-karicheri2@ti.com> 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
WARNING: multiple messages have this Message-ID (diff)
From: Murali Karicheri <m-karicheri2@ti.com> To: grant.likely@linaro.org, robh+dt@kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, bhelgaas@google.com, arnd@arndb.de, Suravee.Suthikulpanit@amd.com, will.deacon@arm.com, joro@8bytes.org, linux@arm.linux.org.uk Cc: Murali Karicheri <m-karicheri2@ti.com> Subject: [PATCH v1] of/pci : fix of_pci_dma_configure parent ptr NULL Date: Wed, 11 Mar 2015 12:40:03 -0400 [thread overview] Message-ID: <1426092003-16925-1-git-send-email-m-karicheri2@ti.com> (raw) 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() Signed-off-by: Murali Karicheri <m-karicheri2@ti.com> 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
next reply other threads:[~2015-03-11 16:40 UTC|newest] Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top 2015-03-11 16:40 Murali Karicheri [this message] 2015-03-11 16:40 ` [PATCH v1] of/pci : fix of_pci_dma_configure parent ptr NULL Murali Karicheri 2015-03-12 15:03 ` Murali Karicheri 2015-03-12 15:03 ` Murali Karicheri 2015-03-19 15:01 ` Bjorn Helgaas 2015-03-20 20:16 ` Murali Karicheri 2015-03-20 20:16 ` Murali Karicheri
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