Bug 7413

Summary:	DMA timeout errors on Dell Latitude XPi CD P150ST
Product:	IO/Storage	Reporter:	Pana (takis)
Component:	IDE	Assignee:	Bartlomiej Zolnierkiewicz (bzolnier)
Status:	REJECTED INSUFFICIENT_DATA
Severity:	normal	CC:	bunk
Priority:	P2
Hardware:	i386
OS:	Linux
Kernel Version:	2.6.19-rc3	Subsystem:
Regression:	---	Bisected commit-id:
Attachments:	Output of lspci -vv Output of dmesg

Description Pana 2006-10-25 05:12:38 UTC

Most recent kernel where this bug did not occur:
Distribution: Debian GNU/Linux 3.1r3
Hardware Environment: Pentium 150Mhz (cpu family 5, cpu model 2, stepping 12)
Software Environment: gcc version 4.0.3 (Ubuntu 4.0.3-1ubuntu5)
Problem Description:
The problem occurs not only on 2.6.19-rc3 but at least already from 2.6.8.
When booting Linux 2.6.19-rc3 (or 2.6.8-16sarge5 so it is not specific
to the current kernels) on a friends laptop, I'm getting a lot of
errormessages from the IDE controller related to DMA problems. When
disabling all DMA related options, the kernel boots fine (and fast).
With DMA enabled, it takes about 1 minute to stumble over the DMA
problems. The laptop is Dell Latitude XPi CD P150ST.

Steps to reproduce:
Boot a 2.6 kernel (I tested 2.6.19-rc3 or 2.6.19-rc2 and 2.6.8) on a Dell
Latitude XPi CD P150ST. It is related to the CMD643 chipset, so it might occur
on other CMD643 using systems too.

Comment 1 Pana 2006-10-25 05:19:46 UTC

Created attachment 9345 [details]
Output of lspci -vv

Comment 2 Pana 2006-10-25 05:21:42 UTC

Created attachment 9346 [details]
Output of dmesg

Comment 3 Alan 2006-12-01 12:24:58 UTC

Bartlomiej is back so transferring to the IDE maintainer to handle

Comment 4 Bartlomiej Zolnierkiewicz 2006-12-16 15:19:19 UTC

Could you please find the last "good" kernel version?
This seems to be some really old bug (maybe even from 2.4 days).

Comment 5 Adrian Bunk 2007-01-16 16:46:21 UTC

Please reopen this bug if:
- it is still present in kernel 2.6.20-rc5 and
- you can provide the requested information.