diff options
Diffstat (limited to 'drivers/block/cciss.c')
| -rw-r--r-- | drivers/block/cciss.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c index 4899ab27f78..a17223c43ae 100644 --- a/drivers/block/cciss.c +++ b/drivers/block/cciss.c @@ -3003,6 +3003,17 @@ 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. + */ + if(board_id == 0x3225103C) { + __u32 dma_prefetch; + dma_prefetch = readl(c->vaddr + I2O_DMA1_CFG); + dma_prefetch |= 0x8000; + writel(dma_prefetch, c->vaddr + I2O_DMA1_CFG); + } + #ifdef CCISS_DEBUG printk("Trying to put board into Simple mode\n"); #endif /* CCISS_DEBUG */ |