powerpc: use iommu_num_pages function in IOMMU code

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: Muli Ben-Yehuda <muli@il.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 7 insertions, 16 deletions

diff --git a/arch/powerpc/kernel/iommu.c b/arch/powerpc/kernel/iommu.c
index e2cf6320907e..ea1ba89f9c90 100644
--- a/arch/powerpc/kernel/iommu.c
+++ b/arch/powerpc/kernel/iommu.c
@@ -51,17 +51,6 @@ static int protect4gb = 1;
 
 static void __iommu_free(struct iommu_table *, dma_addr_t, unsigned int);
 
-static inline unsigned long iommu_nr_pages(unsigned long vaddr,
-                                            unsigned long slen)
-{
-        unsigned long npages;
-
-        npages = IOMMU_PAGE_ALIGN(vaddr + slen) - (vaddr & IOMMU_PAGE_MASK);
-        npages >>= IOMMU_PAGE_SHIFT;
-
-        return npages;
-}
-
 static int __init setup_protect4gb(char *str)
 {
         if (strcmp(str, "on") == 0)
@@ -325,7 +314,7 @@ int iommu_map_sg(struct device *dev, struct iommu_table *tbl,
                 }
                 /* Allocate iommu entries for that segment */
                 vaddr = (unsigned long) sg_virt(s);
-                npages = iommu_nr_pages(vaddr, slen);
+                npages = iommu_num_pages(vaddr, slen, IOMMU_PAGE_SIZE);
                 align = 0;
                 if (IOMMU_PAGE_SHIFT < PAGE_SHIFT && slen >= PAGE_SIZE &&
                     (vaddr & ~PAGE_MASK) == 0)
@@ -418,7 +407,8 @@ int iommu_map_sg(struct device *dev, struct iommu_table *tbl,
                         unsigned long vaddr, npages;
 
                         vaddr = s->dma_address & IOMMU_PAGE_MASK;
-                        npages = iommu_nr_pages(s->dma_address, s->dma_length);
+                        npages = iommu_num_pages(s->dma_address, s->dma_length,
+                                                 IOMMU_PAGE_SIZE);
                         __iommu_free(tbl, vaddr, npages);
                         s->dma_address = DMA_ERROR_CODE;
                         s->dma_length = 0;
@@ -452,7 +442,8 @@ void iommu_unmap_sg(struct iommu_table *tbl, struct scatterlist *sglist,
 
                 if (sg->dma_length == 0)
                         break;
-                npages = iommu_nr_pages(dma_handle, sg->dma_length);
+                npages = iommu_num_pages(dma_handle, sg->dma_length,
+                                         IOMMU_PAGE_SIZE);
                 __iommu_free(tbl, dma_handle, npages);
                 sg = sg_next(sg);
         }
@@ -584,7 +575,7 @@ dma_addr_t iommu_map_single(struct device *dev, struct iommu_table *tbl,
         BUG_ON(direction == DMA_NONE);
 
         uaddr = (unsigned long)vaddr;
-        npages = iommu_nr_pages(uaddr, size);
+        npages = iommu_num_pages(uaddr, size, IOMMU_PAGE_SIZE);
 
         if (tbl) {
                 align = 0;
@@ -617,7 +608,7 @@ void iommu_unmap_single(struct iommu_table *tbl, dma_addr_t dma_handle,
         BUG_ON(direction == DMA_NONE);
 
         if (tbl) {
-                npages = iommu_nr_pages(dma_handle, size);
+                npages = iommu_num_pages(dma_handle, size, IOMMU_PAGE_SIZE);
                 iommu_free(tbl, dma_handle, npages);
         }
 }