Commit c179c9b9 authored Jul 09, 2015 by Jiang Liu Committed by Thomas Gleixner Jul 22, 2015

PCI: Add helper function msi_desc_to_pci_sysdata()



Add helper function msi_desc_to_pci_sysdata() to retrieve sysdata from
an MSI descriptor. To avoid pulling include/linux/pci.h into
include/linux/msi.h, msi_desc_to_pci_sysdata() is implemented as a normal
function instead of an inline function.

Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Reviewed-by: Yijing Wang <wangyijing@huawei.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: Grant Likely <grant.likely@linaro.org>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Stuart Yoder <stuart.yoder@freescale.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Alexander Gordeev <agordeev@redhat.com>
Link: http://lkml.kernel.org/r/1436428847-8886-2-git-send-email-jiang.liu@linux.intel.com


Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

parent faca10b9

drivers/pci/msi.c

+8 −0

Original line number	Diff line number	Diff line
		@@ -1137,6 +1137,14 @@ int pci_enable_msix_range(struct pci_dev dev, struct msix_entry entries,
		}
		EXPORT_SYMBOL(pci_enable_msix_range);

		void msi_desc_to_pci_sysdata(struct msi_desc desc)
		{
		struct pci_dev *dev = msi_desc_to_pci_dev(desc);

		return dev->bus->sysdata;
		}
		EXPORT_SYMBOL_GPL(msi_desc_to_pci_sysdata);

		#ifdef CONFIG_PCI_MSI_IRQ_DOMAIN
		/**
		* pci_msi_domain_write_msg - Helper to write MSI message to PCI config space

include/linux/msi.h

+7 −0

Original line number	Diff line number	Diff line
		@@ -60,6 +60,13 @@ static inline struct pci_dev msi_desc_to_pci_dev(struct msi_desc desc)
		{
		return desc->dev;
		}

		void msi_desc_to_pci_sysdata(struct msi_desc desc);
		#else /* CONFIG_PCI_MSI */
		static inline void msi_desc_to_pci_sysdata(struct msi_desc desc)
		{
		return NULL;
		}
		#endif /* CONFIG_PCI_MSI */

		void __pci_read_msi_msg(struct msi_desc entry, struct msi_msg msg);

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