---

yaml --- r: 70901 b: refs/heads/master c: 8bf50f7 h: refs/heads/master i: 70899: 6eaac88 v: v3
git-mirror · Oct 17, 2007 · a7a4296 · a7a4296
1 parent 002d8dc
commit a7a4296
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Showing 2 changed files with 9 additions and 4 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 9e91fdb32d449a6b57f8236a793ae2f3df79b4d8
+refs/heads/master: 8bf50f71cbfc7d043f0f135da72b3feefeaa0eb8
diff --git a/trunk/drivers/block/cciss.c b/trunk/drivers/block/cciss.c
@@ -3035,15 +3035,20 @@ 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