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SubjectRe: 2.4.20-rc1 and udma with VIA kt8235
Date
I have been using the following modification for a couple of weeks now to both 
the 2.4.19 and 2.4.20-pre11 kernels on an MSI KT3 Ultra2 board (has the 8235
southbridge) and have not had any problems with the hard drives or DVD/CDRW
drives in the system running in UDMA mode.

The code modification comes from a patch that was posted to the list a while
back by Vojtech.

--
Joshua Jackson
http://www.coyotelinux.com


On Monday 04 November 2002 6:27 pm, Christian Guggenberger wrote:
> Marcello, Vojtech,
>
> would you please incorporate the patch which lets udma work on a VIA kt8235
> Southbridge in one of the next 2.4.20-rc releases?
> I know, it would work with 2.5 series but that's not an alternative for me
> now.
>
> Christian
> -
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diff -uNr linux-2.4.20-pre11/drivers/ide/via82cxxx.c linux/drivers/ide/via82cxxx.c
--- linux-2.4.20-pre11/drivers/ide/via82cxxx.c 2002-11-04 19:25:47.000000000 -0500
+++ linux/drivers/ide/via82cxxx.c 2002-10-28 18:49:41.000000000 -0500
@@ -105,8 +105,8 @@
} via_isa_bridges[] = {
#ifdef FUTURE_BRIDGES
{ "vt8237", PCI_DEVICE_ID_VIA_8237, 0x00, 0x2f, VIA_UDMA_133 },
- { "vt8235", PCI_DEVICE_ID_VIA_8235, 0x00, 0x2f, VIA_UDMA_133 },
#endif
+ { "vt8235", PCI_DEVICE_ID_VIA_8235, 0x00, 0x2f, VIA_UDMA_133 },
{ "vt8233a", PCI_DEVICE_ID_VIA_8233A, 0x00, 0x2f, VIA_UDMA_133 },
{ "vt8233c", PCI_DEVICE_ID_VIA_8233C_0, 0x00, 0x2f, VIA_UDMA_100 },
{ "vt8233", PCI_DEVICE_ID_VIA_8233_0, 0x00, 0x2f, VIA_UDMA_100 },
diff -uNr linux-2.4.20-pre11/include/linux/pci_ids.h linux/include/linux/pci_ids.h
--- linux-2.4.20-pre11/include/linux/pci_ids.h 2002-11-04 19:26:41.000000000 -0500
+++ linux/include/linux/pci_ids.h 2002-10-28 18:51:41.000000000 -0500
@@ -986,6 +986,7 @@
#define PCI_DEVICE_ID_VIA_8233C_0 0x3109
#define PCI_DEVICE_ID_VIA_8361 0x3112
#define PCI_DEVICE_ID_VIA_8233A 0x3147
+#define PCI_DEVICE_ID_VIA_8235 0x3177
#define PCI_DEVICE_ID_VIA_86C100A 0x6100
#define PCI_DEVICE_ID_VIA_8231 0x8231
#define PCI_DEVICE_ID_VIA_8231_4 0x8235
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