From 445bb802adb5b1a55a0e65639f8c26d312fd0a13 Mon Sep 17 00:00:00 2001
From: Samuel Thibault <samuel.thibault@ens-lyon.org>
Date: Wed, 6 Feb 2008 11:31:38 +0000
Subject: * linux/src/drivers/block/triton.c (ide_init_triton): Enable
Bus Mastering if not enabled by BIOS.
---
linux/src/drivers/block/triton.c | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
(limited to 'linux/src/drivers/block')
diff --git a/linux/src/drivers/block/triton.c b/linux/src/drivers/block/triton.c
index 739b1b9..0017069 100644
--- a/linux/src/drivers/block/triton.c
+++ b/linux/src/drivers/block/triton.c
@@ -409,7 +409,17 @@ void ide_init_triton (byte bus, byte fn)
goto quit;
}
if ((pcicmd & 4) == 0) {
- printk("ide: BM-DMA feature is not enabled (BIOS)\n");
+ printk("ide: BM-DMA feature is not enabled (BIOS), enabling\n");
+ pcicmd |= 4;
+ pcibios_write_config_word(bus, fn, 0x04, pcicmd);
+ if ((rc = pcibios_read_config_word(bus, fn, 0x04, &pcicmd))) {
+ printk("ide: Couldn't read back PCI command\n");
+ goto quit;
+ }
+ }
+
+ if ((pcicmd & 4) == 0) {
+ printk("ide: BM-DMA feature couldn't be enabled\n");
} else {
/*
* Get the bmiba base address
--
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