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| author | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-17 20:08:13 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-17 20:08:13 +0400 |
| commit | b6257a9036f06878a0f02354d5a07f155e1cfee0 (patch) | |
| tree | c0e12e3568199b748ebc7c1f9cf4005ae5da5f36 /drivers/block | |
| parent | c548f08a4f7b89b93c805e0c4024b8302afa7121 (diff) | |
| parent | f5c0dde4c66421a3a2d7d6fa604a712c9b0744e5 (diff) | |
| download | linux-b6257a9036f06878a0f02354d5a07f155e1cfee0.tar.xz | |
Merge branch 'for-linus' of git://git.kernel.dk/data/git/linux-2.6-block
* 'for-linus' of git://git.kernel.dk/data/git/linux-2.6-block:
[SCSI] Remove full sg table memset()
[SCSI] ide-scsi: remove usage of sg_last()
Fix loop terminating conditions in fill_sg().
[BLOCK] Clear sg entry before filling in blk_rq_map_sg()
IA64: iommu uses sg_next with an invalid sg element
cciss: disable DMA refetch on Smart Array P600
swiotlb: fix map_sg failure handling
SPARC64: fix iommu sg chaining
[SCSI] ide-scsi: use scsi_sg_count() instead of ->use_sg
Diffstat (limited to 'drivers/block')
| -rw-r--r-- | drivers/block/cciss.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c index ca56a0e5cd5e..7c2cfde08f18 100644 --- a/drivers/block/cciss.c +++ b/drivers/block/cciss.c @@ -3076,15 +3076,20 @@ static int cciss_pci_init(ctlr_info_t *c, struct pci_dev *pdev) } #endif - /* Disabling DMA prefetch for the P600 - * An ASIC bug may result in a prefetch beyond - * physical memory. + /* Disabling DMA prefetch and refetch for the P600. + * An ASIC bug may result in accesses to invalid memory addresses. + * We've disabled prefetch for some time now. Testing with XEN + * kernels revealed a bug in the refetch if dom0 resides on a P600. */ if(board_id == 0x3225103C) { __u32 dma_prefetch; + __u32 dma_refetch; dma_prefetch = readl(c->vaddr + I2O_DMA1_CFG); dma_prefetch |= 0x8000; writel(dma_prefetch, c->vaddr + I2O_DMA1_CFG); + pci_read_config_dword(pdev, PCI_COMMAND_PARITY, &dma_refetch); + dma_refetch |= 0x1; + pci_write_config_dword(pdev, PCI_COMMAND_PARITY, dma_refetch); } #ifdef CCISS_DEBUG |