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Subject[tip:core/iommu] x86: Calgary: Remove unnecessary DMA_ERROR_CODE usage
Commit-ID:  1f7564ca831a00b21bb493ef174c845b2ba9e64d
Gitweb: http://git.kernel.org/tip/1f7564ca831a00b21bb493ef174c845b2ba9e64d
Author: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
AuthorDate: Sun, 15 Nov 2009 21:19:54 +0900
Committer: Ingo Molnar <mingo@elte.hu>
CommitDate: Tue, 17 Nov 2009 07:53:21 +0100

x86: Calgary: Remove unnecessary DMA_ERROR_CODE usage

This cleans up iommu_alloc() a bit and removes unnecessary
DMA_ERROR_CODE usage.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Cc: muli@il.ibm.com
Cc: joerg.roedel@amd.com
LKML-Reference: <1258287594-8777-4-git-send-email-fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
arch/x86/kernel/pci-calgary_64.c | 15 ++++++---------
1 files changed, 6 insertions(+), 9 deletions(-)
diff --git a/arch/x86/kernel/pci-calgary_64.c b/arch/x86/kernel/pci-calgary_64.c
index af9f436..849a099 100644
--- a/arch/x86/kernel/pci-calgary_64.c
+++ b/arch/x86/kernel/pci-calgary_64.c
@@ -261,12 +261,15 @@ static dma_addr_t iommu_alloc(struct device *dev, struct iommu_table *tbl,
void *vaddr, unsigned int npages, int direction)
{
unsigned long entry;
- dma_addr_t ret = DMA_ERROR_CODE;
+ dma_addr_t ret;

entry = iommu_range_alloc(dev, tbl, npages);

- if (unlikely(entry == DMA_ERROR_CODE))
- goto error;
+ if (unlikely(entry == DMA_ERROR_CODE)) {
+ printk(KERN_WARNING "Calgary: failed to allocate %u pages in "
+ "iommu %p\n", npages, tbl);
+ return DMA_ERROR_CODE;
+ }

/* set the return dma address */
ret = (entry << PAGE_SHIFT) | ((unsigned long)vaddr & ~PAGE_MASK);
@@ -274,13 +277,7 @@ static dma_addr_t iommu_alloc(struct device *dev, struct iommu_table *tbl,
/* put the TCEs in the HW table */
tce_build(tbl, entry, npages, (unsigned long)vaddr & PAGE_MASK,
direction);
-
return ret;
-
-error:
- printk(KERN_WARNING "Calgary: failed to allocate %u pages in "
- "iommu %p\n", npages, tbl);
- return DMA_ERROR_CODE;
}

static void iommu_free(struct iommu_table *tbl, dma_addr_t dma_addr,

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