linux-kernel - [PATCH 12/25] iommu/dma: Remove __iommu_dma

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Message-Id: <20190430105214.24628-13-hch@lst.de>
Date:   Tue, 30 Apr 2019 06:52:01 -0400
From:   Christoph Hellwig <hch@....de>
To:     Robin Murphy <robin.murphy@....com>
Cc:     Joerg Roedel <joro@...tes.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        Tom Lendacky <thomas.lendacky@....com>,
        iommu@...ts.linux-foundation.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH 12/25] iommu/dma: Remove __iommu_dma_free

We only have a single caller of this function left, so open code it there.

Signed-off-by: Christoph Hellwig <hch@....de>
Reviewed-by: Robin Murphy <robin.murphy@....com>
---
 drivers/iommu/dma-iommu.c | 21 ++-------------------
 1 file changed, 2 insertions(+), 19 deletions(-)

diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c
index 969a11c667fa..25def31ade4d 100644
--- a/drivers/iommu/dma-iommu.c
+++ b/drivers/iommu/dma-iommu.c
@@ -534,24 +534,6 @@ static struct page **__iommu_dma_get_pages(void *cpu_addr)
 	return area->pages;
 }
 
-/**
- * iommu_dma_free - Free a buffer allocated by iommu_dma_alloc_remap()
- * @dev: Device which owns this buffer
- * @pages: Array of buffer pages as returned by __iommu_dma_alloc_remap()
- * @size: Size of buffer in bytes
- * @handle: DMA address of buffer
- *
- * Frees both the pages associated with the buffer, and the array
- * describing them
- */
-static void __iommu_dma_free(struct device *dev, struct page **pages,
-		size_t size, dma_addr_t *handle)
-{
-	__iommu_dma_unmap(dev, *handle, size);
-	__iommu_dma_free_pages(pages, PAGE_ALIGN(size) >> PAGE_SHIFT);
-	*handle = DMA_MAPPING_ERROR;
-}
-
 /**
  * iommu_dma_alloc_remap - Allocate and map a buffer contiguous in IOVA space
  * @dev: Device to allocate memory for. Must be a real device
@@ -1034,7 +1016,8 @@ static void iommu_dma_free(struct device *dev, size_t size, void *cpu_addr,
 
 		if (!pages)
 			return;
-		__iommu_dma_free(dev, pages, iosize, &handle);
+		__iommu_dma_unmap(dev, handle, iosize);
+		__iommu_dma_free_pages(pages, size >> PAGE_SHIFT);
 		dma_common_free_remap(cpu_addr, size, VM_USERMAP);
 	} else {
 		__iommu_dma_unmap(dev, handle, iosize);
-- 
2.20.1