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SubjectRe: [PATCH] return hidden bug
Rik van Riel wrote:
> On Mon, 22 Oct 2007 03:05:05 +0200
> Roel Kluin <12o3l@tiscali.nl> wrote:
>
>> return hidden bug
>>
>> Signed-off-by: Roel Kluin <12o3l@tiscali.nl>
>>
>> diff --git a/arch/alpha/kernel/pci_iommu.c
>> b/arch/alpha/kernel/pci_iommu.c index e1c4707..6a69425 100644
>> --- a/arch/alpha/kernel/pci_iommu.c
>> +++ b/arch/alpha/kernel/pci_iommu.c
>> @@ -365,8 +365,8 @@ pci_unmap_single(struct pci_dev *pdev, dma_addr_t
>> dma_addr, size_t size, printk(KERN_ERR "Bogus pci_unmap_single:
>> dma_addr %lx " " base %lx size %x\n", dma_addr, arena->dma_base,
>> arena->size);
>> - return;
>> BUG();
>> + return;
>> }
>>
>> npages = calc_npages((dma_addr & ~PAGE_MASK) + size);
>
> BUG() will terminate the process that runs into it, so you can
> just remove the return alltogether. If BUG() is hit, the return
> will never be reached.
>
---
hidden bug returns

Signed-off-by: Roel Kluin <12o3l@tiscali.nl>
---
diff --git a/arch/alpha/kernel/pci_iommu.c b/arch/alpha/kernel/pci_iommu.c
index e1c4707..ca55c33 100644
--- a/arch/alpha/kernel/pci_iommu.c
+++ b/arch/alpha/kernel/pci_iommu.c
@@ -365,7 +365,6 @@ pci_unmap_single(struct pci_dev *pdev, dma_addr_t dma_addr, size_t size,
printk(KERN_ERR "Bogus pci_unmap_single: dma_addr %lx "
" base %lx size %x\n", dma_addr, arena->dma_base,
arena->size);
- return;
BUG();
}

-
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