From: Fenghua Yu <fenghua.yu@intel.com>
To: linux-ia64@vger.kernel.org
Subject: [PATCH 2.6.30 stable] Bug Fix arch/ia64/kernel/pci-dma.c: fix recursive dma_supported() call in iomm
Date: Sat, 15 Aug 2009 00:33:00 +0000 [thread overview]
Message-ID: <20090815003259.GA18989@linux-os.sc.intel.com> (raw)
The commit 160c1d8e40866edfeae7d68816b7005d70acf391 introduced
dma_ops->dma_supported = iommu_dma_supported;
This dma_ops->dma_supported is first called in platform_dma_init() during kernel
boot. Then dma_ops->dma_supported will be called recursively in
iommu_dma_supported.
Kernel can not boot because kernel can not get out of iommu_dma_supported until
it runs out of stack memory.
This patch is in commit 51b89f7a6615eca184aa0b85db5781d931e9c8d1
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
---
arch/ia64/kernel/pci-dma.c | 5 -----
1 files changed, 5 deletions(-)
diff --git a/arch/ia64/kernel/pci-dma.c b/arch/ia64/kernel/pci-dma.c
index 0569596..f6b1ff0 100644
--- a/arch/ia64/kernel/pci-dma.c
+++ b/arch/ia64/kernel/pci-dma.c
@@ -69,11 +69,6 @@ iommu_dma_init(void)
int iommu_dma_supported(struct device *dev, u64 mask)
{
- struct dma_map_ops *ops = platform_dma_get_ops(dev);
-
- if (ops->dma_supported)
- return ops->dma_supported(dev, mask);
-
/* Copied from i386. Doesn't make much sense, because it will
only work for pci_alloc_coherent.
The caller just has to use GFP_DMA in this case. */
reply other threads:[~2009-08-15 0:33 UTC|newest]
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