[PATCH v2 2/2] PCI: Remove pci_get_dma_source()

From: Alex Williamson
Date: Wed Sep 17 2014 - 12:41:22 EST


Remove dead code. We now have dma_alias_devfn to describe this

Signed-off-by: Alex Williamson <alex.williamson@xxxxxxxxxx>
---

drivers/pci/quirks.c | 51 --------------------------------------------------
include/linux/pci.h | 5 -----
2 files changed, 56 deletions(-)

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 78cc83f..e232425 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -3512,57 +3512,6 @@ DECLARE_PCI_FIXUP_HEADER(0x1283, 0x8892, quirk_use_pcie_bridge_dma_alias);
/* Intel 82801, https://bugzilla.kernel.org/show_bug.cgi?id=44881#c49 */
DECLARE_PCI_FIXUP_HEADER(0x8086, 0x244e, quirk_use_pcie_bridge_dma_alias);

-static struct pci_dev *pci_func_0_dma_source(struct pci_dev *dev)
-{
- if (!PCI_FUNC(dev->devfn))
- return pci_dev_get(dev);
-
- return pci_get_slot(dev->bus, PCI_DEVFN(PCI_SLOT(dev->devfn), 0));
-}
-
-static const struct pci_dev_dma_source {
- u16 vendor;
- u16 device;
- struct pci_dev *(*dma_source)(struct pci_dev *dev);
-} pci_dev_dma_source[] = {
- /*
- * https://bugzilla.redhat.com/show_bug.cgi?id=605888
- *
- * Some Ricoh devices use the function 0 source ID for DMA on
- * other functions of a multifunction device. The DMA devices
- * is therefore function 0, which will have implications of the
- * iommu grouping of these devices.
- */
- { PCI_VENDOR_ID_RICOH, 0xe822, pci_func_0_dma_source },
- { PCI_VENDOR_ID_RICOH, 0xe230, pci_func_0_dma_source },
- { PCI_VENDOR_ID_RICOH, 0xe832, pci_func_0_dma_source },
- { PCI_VENDOR_ID_RICOH, 0xe476, pci_func_0_dma_source },
- { 0 }
-};
-
-/*
- * IOMMUs with isolation capabilities need to be programmed with the
- * correct source ID of a device. In most cases, the source ID matches
- * the device doing the DMA, but sometimes hardware is broken and will
- * tag the DMA as being sourced from a different device. This function
- * allows that translation. Note that the reference count of the
- * returned device is incremented on all paths.
- */
-struct pci_dev *pci_get_dma_source(struct pci_dev *dev)
-{
- const struct pci_dev_dma_source *i;
-
- for (i = pci_dev_dma_source; i->dma_source; i++) {
- if ((i->vendor == dev->vendor ||
- i->vendor == (u16)PCI_ANY_ID) &&
- (i->device == dev->device ||
- i->device == (u16)PCI_ANY_ID))
- return i->dma_source(dev);
- }
-
- return pci_dev_get(dev);
-}
-
/*
* AMD has indicated that the devices below do not support peer-to-peer
* in any system where they are found in the southbridge with an AMD
diff --git a/include/linux/pci.h b/include/linux/pci.h
index b4fb9f4..b4937d7 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -1557,16 +1557,11 @@ enum pci_fixup_pass {

#ifdef CONFIG_PCI_QUIRKS
void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev);
-struct pci_dev *pci_get_dma_source(struct pci_dev *dev);
int pci_dev_specific_acs_enabled(struct pci_dev *dev, u16 acs_flags);
void pci_dev_specific_enable_acs(struct pci_dev *dev);
#else
static inline void pci_fixup_device(enum pci_fixup_pass pass,
struct pci_dev *dev) { }
-static inline struct pci_dev *pci_get_dma_source(struct pci_dev *dev)
-{
- return pci_dev_get(dev);
-}
static inline int pci_dev_specific_acs_enabled(struct pci_dev *dev,
u16 acs_flags)
{

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