[PATCH] alim15x3.c: M5229 (rev c8) support for DMA cd-writer

[Michael De Backer <micdb@skynet.be>]

From: Michael De Backer <micdb@skynet.be>

Configuration bits are not set properly for DMA on some chipset
revisions. It has already been corrected for M5229 (rev c7) but not for
M5229 (rev c8). This leads to the bug described at
http://bugzilla.kernel.org/show_bug.cgi?id=5786 (lost interrupt + ide
bus hangs).

Signed-off-by: Michael De Backer <micdb@skynet.be>
---
This has been tested on ASUS A8R32-MVP motherboard (M5229 c8) with
2.6.18-rc6, 2.6.18-rc6-mm1, 2.6.18-rc5-mm1, 2.6.17.10 and two different
cd-writers. It completely solves the problem. 

The following patch is against the 2.6.18-rc6 or 2.6.18-rc6-mm1 kernel:

--- linux/drivers/ide/pci/alim15x3.c.orig       2006-09-09
16:07:07.000000000 +0200
+++ linux/drivers/ide/pci/alim15x3.c    2006-09-09 16:08:25.000000000
+0200
@@ -730,7 +730,7 @@ static unsigned int __devinit ata66_ali1

	if(m5229_revision <= 0x20)
		tmpbyte = (tmpbyte & (~0x02)) | 0x01;
-       else if (m5229_revision == 0xc7)
+       else if (m5229_revision == 0xc7 || 0xc8)
		tmpbyte |= 0x03;
	else
		tmpbyte |= 0x01;

-
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