linux-kernel - [tip:core/iommu] x86: Calgary: Remove unnecessary DMA_ERROR

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Message-ID: <tip-1f7564ca831a00b21bb493ef174c845b2ba9e64d@git.kernel.org>
Date:	Tue, 17 Nov 2009 08:25:22 GMT
From:	tip-bot for FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com,
	jbarnes@...tuousgeek.org, fujita.tomonori@....ntt.co.jp,
	tglx@...utronix.de, mingo@...e.hu
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@....ntt.co.jp>
AuthorDate: Sun, 15 Nov 2009 21:19:54 +0900
Committer:  Ingo Molnar <mingo@...e.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@....ntt.co.jp>
Acked-by: Jesse Barnes <jbarnes@...tuousgeek.org>
Cc: muli@...ibm.com
Cc: joerg.roedel@....com
LKML-Reference: <1258287594-8777-4-git-send-email-fujita.tomonori@....ntt.co.jp>
Signed-off-by: Ingo Molnar <mingo@...e.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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