Bug 1044 - STT20000A Tape drive dma blacklist
Summary: STT20000A Tape drive dma blacklist
Status: CLOSED CODE_FIX
Alias: None
Product: IO/Storage
Classification: Unclassified
Component: IDE (show other bugs)
Hardware: i386 Linux
: P2 normal
Assignee: Bartlomiej Zolnierkiewicz
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2003-08-05 00:55 UTC by Andrew Lunn
Modified: 2007-06-02 15:36 UTC (History)
3 users (show)

See Also:
Kernel Version: 2.6.0-test2
Subsystem:
Regression: ---
Bisected commit-id:

Attachments
patch to blacklist the device (518 bytes, patch)
2003-08-05 00:57 UTC, Andrew Lunn 		Details | Diff
Add an attachment (proposed patch, testcase, etc.)

Description Andrew Lunn 2003-08-05 00:55:52 UTC 
Distribution:         Debian Woody
Hardware Environment:
Software Environment:
Problem Description:

I have a seagate STT20000A IDE tape drive which im using with an SiS IDE
controller. The defaults for SiS is for every IDE device to use DMA. This causes
my tape drive a problem because its DMA is broken. I talked to Seagate and they
confirm that the device will only work reliably in PIO mode. 

Here is a patch to add this device to the IDE black list.
Comment 1 Andrew Lunn 2003-08-05 00:57:17 UTC 
Created attachment 612 [details]
patch to blacklist the device
Comment 2 Adrian Bunk 2005-07-02 07:28:41 UTC 
Bart, can you comment on this bug?
Comment 3 Adrian Bunk 2006-03-13 13:08:31 UTC 
Bart?
Comment 4 Nishanth Aravamudan 2006-05-16 12:12:20 UTC 
Andrew,

Is this still a problem for you in more recent kernels?

Thanks,
Nish
Comment 5 Andrew Lunn 2006-07-31 05:18:26 UTC 
Sorry, no idea. I took the drive out to make room for a DVD writer.

Seagate did confirm that the device would only work relibably with PIO, so
blacklisting it does seem to be the correct thing to do.
Comment 6 Adrian Bunk 2006-11-23 15:48:40 UTC 
Alan, can you look at the patch from this bug?
Comment 7 Alan 2006-11-23 16:26:42 UTC 
Looks fine to me, wants applying to libata as well. Send patches.
Comment 8 Adrian Bunk 2007-01-23 14:41:44 UTC 
Bart, can you apply the patch from this bug?
Comment 9 Dave Jones 2007-05-21 07:54:08 UTC 
Patch re-posted upstream. Four years for a bug which has a patch available is
just shockingly bad.
Comment 10 Bartlomiej Zolnierkiewicz 2007-06-02 15:36:33 UTC 
Merged upstream.  I'm closing the bug.

Sorry for the sad record (I partially blame bugzilla for that)...
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