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Subject[PATCH 7/7] iommu/dma-iommu: Remove iommu_dma_map_msi_msg()
Date
A recent patch introduced two new functions to replace
iommu_dma_map_msi_msg() to avoid executing preemptible code in
non-preemptible context.

All the existings callers are now using the two new functions, so
iommu_dma_map_msi_msg() can be removed.

Signed-off-by: Julien Grall <julien.grall@arm.com>
---
drivers/iommu/dma-iommu.c | 20 --------------------
include/linux/dma-iommu.h | 5 -----
2 files changed, 25 deletions(-)

diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c
index f5c1f1685095..fdc8ded62e87 100644
--- a/drivers/iommu/dma-iommu.c
+++ b/drivers/iommu/dma-iommu.c
@@ -928,23 +928,3 @@ void iommu_dma_compose_msi_msg(int irq, struct msi_msg *msg)
msg->address_lo &= cookie_msi_granule(domain->iova_cookie) - 1;
msg->address_lo += lower_32_bits(msi_page->iova);
}
-
-void iommu_dma_map_msi_msg(int irq, struct msi_msg *msg)
-{
- struct msi_desc *desc = irq_get_msi_desc(irq);
- phys_addr_t msi_addr = (u64)msg->address_hi << 32 | msg->address_lo;
-
- if (WARN_ON(iommu_dma_prepare_msi(desc, msi_addr))) {
- /*
- * We're called from a void callback, so the best we can do is
- * 'fail' by filling the message with obviously bogus values.
- * Since we got this far due to an IOMMU being present, it's
- * not like the existing address would have worked anyway...
- */
- msg->address_hi = ~0U;
- msg->address_lo = ~0U;
- msg->data = ~0U;
- } else {
- iommu_dma_compose_msi_msg(irq, msg);
- }
-}
diff --git a/include/linux/dma-iommu.h b/include/linux/dma-iommu.h
index 2f4b2c2cc859..4fe2b2fb19bf 100644
--- a/include/linux/dma-iommu.h
+++ b/include/linux/dma-iommu.h
@@ -81,7 +81,6 @@ int iommu_dma_prepare_msi(struct msi_desc *desc, phys_addr_t msi_addr);
/* Update the MSI message if required. */
void iommu_dma_compose_msi_msg(int irq, struct msi_msg *msg);

-void iommu_dma_map_msi_msg(int irq, struct msi_msg *msg);
void iommu_dma_get_resv_regions(struct device *dev, struct list_head *list);

#else
@@ -120,10 +119,6 @@ static inline void iommu_dma_compose_msi_msg(int irq, struct msi_msg *msg)
{
}

-static inline void iommu_dma_map_msi_msg(int irq, struct msi_msg *msg)
-{
-}
-
static inline void iommu_dma_get_resv_regions(struct device *dev, struct list_head *list)
{
}
--
2.11.0
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