Package: linux-image-2.6.18-4-footbridge
Version: 2.6.18.dfsg.1-12
Severity: important
On the "cats" machines that we use for arm buildd work, it seems the
kernel is too aggressive in enabling UDMA support for the onboard IDE
chip:
ALi Corporation M5229 IDE (rev c1)
So much so, that simple data transfers are corrupted - the very first
read from a disk to find the partition table in sector 0 is corrupted
and the machine fails to boot. I've debugged through this to verify
the problem, and for these machines for now I have built a custom
kernel with UDMA disabled altogether. Trivial heavy-handed patch
included here, but I'm deliberatly not setting the "patch" tag as I
doubt you'll want to apply this as-is.
--- debian/kernel/linux-2.6-2.6.18.dfsg.1/drivers/ide/pci/alim15x3.c 2006-09-20 04:42:06.000000000 +0100
+++ alim15x3.c 2007-04-16 00:25:17.000000000 +0100
@@ -378,6 +379,8 @@
struct hd_driveid *id = drive->id;
#endif /* CONFIG_WDC_ALI15X3 */
+ return 0;
+
if (m5229_revision <= 0x20) {
return 0;
} else if ((m5229_revision < 0xC2) &&
--
Steve McIntyre, Cambridge, UK. steve@einval.com
< sladen> I actually stayed in a hotel and arrived to find a post-it
note stuck to the mini-bar saying "Paul: This fridge and
fittings are the correct way around and do not need altering"
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