patch-2.4.18 linux/arch/alpha/kernel/sys_miata.c

• Lines: 17
• Date: Mon Jan 14 16:31:16 2002
• Orig file: linux.orig/arch/alpha/kernel/sys_miata.c
• Orig date: Mon Feb 18 20:18:39 2002

diff -Naur -X /home/marcelo/lib/dontdiff linux.orig/arch/alpha/kernel/sys_miata.c linux/arch/alpha/kernel/sys_miata.c
@@ -230,7 +230,15 @@
 miata_init_pci(void)
 {
 	cia_init_pci();
-	SMC669_Init(0); /* it might be a GL (fails harmlessly if not) */
+	/* The PYXIS has data corruption problem with scatter/gather
+	   burst DMA reads crossing 8K boundary. It had been fixed
+	   with off-chip logic on all PYXIS systems except first
+	   MIATAs, so disable SG DMA on such machines. */
+	if (!SMC669_Init(0)) {	/* MIATA GL has SMC37c669 Super I/O */
+		alpha_mv.mv_pci_tbi = NULL; 
+		printk(KERN_INFO "pci: pyxis 8K boundary dma bug - "
+				 "sg dma disabled\n");
+	}
 	es1888_init();
 }