[POC][PATCH 26/83] dma_4v_alloc_coherent(): don't mix virtual and physical addresses

[Al Viro]

From: Al Viro <v...@zeniv.linux.org.uk>

Signed-off-by: Al Viro <v...@zeniv.linux.org.uk>
---
 arch/sparc/kernel/pci_sun4v.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/arch/sparc/kernel/pci_sun4v.c b/arch/sparc/kernel/pci_sun4v.c
index 3eb8907..3ea1937 100644
--- a/arch/sparc/kernel/pci_sun4v.c
+++ b/arch/sparc/kernel/pci_sun4v.c
@@ -151,8 +151,8 @@ static void *dma_4v_alloc_coherent(struct device *dev, 
size_t size,
        if (unlikely(!page))
                return NULL;
 
-       first_page = (unsigned long) page_address(page);
-       memset((char *)first_page, 0, PAGE_SIZE << order);
+       ret =  page_address(page);
+       memset(ret, 0, PAGE_SIZE << order);
 
        iommu = dev->archdata.iommu;
 
@@ -163,8 +163,7 @@ static void *dma_4v_alloc_coherent(struct device *dev, 
size_t size,
                goto range_alloc_fail;
 
        *dma_addrp = (iommu->tbl.table_map_base + (entry << IO_PAGE_SHIFT));
-       ret = (void *) first_page;
-       first_page = __pa(first_page);
+       first_page = __pa(ret);
 
        local_irq_save(flags);
 
@@ -190,7 +189,7 @@ iommu_map_fail:
        iommu_tbl_range_free(&iommu->tbl, *dma_addrp, npages, IOMMU_ERROR_CODE);
 
 range_alloc_fail:
-       free_pages((void *)first_page, order);
+       free_pages(ret, order);
        return NULL;
 }
 
-- 
2.1.4

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