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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>
This commit is contained in:
Jiang Liu 2015-07-09 16:00:36 +08:00 committed by Thomas Gleixner
parent faca10b9e6
commit c179c9b978
2 changed files with 15 additions and 0 deletions
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8
drivers/pci/msi.c
View File

@ -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

7
include/linux/msi.h
View File

@ -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);