Bug 4334 - kernel support for netmos 9835/9735 crippled since 2.6.9
Summary: kernel support for netmos 9835/9735 crippled since 2.6.9
Alias: None
Product: Drivers
Classification: Unclassified
Component: Parallel (show other bugs)
Hardware: i386 Linux
: P2 normal
Assignee: drivers_parallel
Depends on:
Reported: 2005-03-13 01:11 UTC by Steven Brudenell
Modified: 2005-08-25 16:59 UTC (History)
1 user (show)

See Also:
Kernel Version: 2.6.9 2.6.10 2.6.11
Tree: Mainline
Regression: ---

Netmos combo card support (14.75 KB, patch)
2005-03-22 14:18 UTC, Bjorn Helgaas
Details | Diff

Description Steven Brudenell 2005-03-13 01:11:21 UTC
Distribution: Any
Hardware Environment: NetMos 9835 or 9735
Software Environment: Any
Problem Description: In kernel 2.6.9, a patch was added to parport_pc to support
the parallel port on netmos 9835 and 9735 chipsets, which are found on combo
parallel/serial pci cards. Support for these chips already existed in
parport_serial prior to this. Since parport_serial depends on parport_pc,
parport_pc always gets loaded first, with limited (parallel port only) support
for these cards, and the complete (parallel+serial) functionality in
parport_serial is superseded. The serial functionality of these cards does not
work in either 2.6.9 or 2.6.10.

Reproducible: Always
Steps to Reproduce:
1. Obtain NetMos 9835 or 9735 board.
2. Compile linux 2.6.9 or 2.6.10 with support for parport_serial enabled
(built-in or module, either way works).
3. Boot with this kernel.

Actual Results:  
Only the parallel port on this board is identified.

Expected Results:  
Both the parallel port and the serial ports (there are two on the 9835, which I
have) should be identified.

I have read of other people having an identical problem, with the same boards on
the same kernel version.
Removing support in parport_pc for these netmos boards produces the required
Using with the same configuration also works.
Comment 1 Bjorn Helgaas 2005-03-22 14:18:55 UTC
Created attachment 4781 [details]
Netmos combo card support

Better Netmos support
Comment 2 Adrian Bunk 2005-08-25 16:59:26 UTC
The patch from this bug is already applied in kernel 2.6.12, and I'm therefore
assuming that this issue is already fixed.

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