Bug 184212 - make CONFIG_SERIAL_8250_NR_UARTS bigger please
make CONFIG_SERIAL_8250_NR_UARTS bigger please
Status: CLOSED NOTABUG
Product: Fedora
Classification: Fedora
Component: kernel (Show other bugs)
5
x86_64 Linux
medium Severity medium
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Assigned To: Dave Jones
Brian Brock
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Depends On:
Blocks:
  Show dependency treegraph
 
Reported: 2006-03-07 07:33 EST by Tom Horsley
Modified: 2015-01-04 17:25 EST (History)
2 users (show)

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Doc Type: Bug Fix
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Last Closed: 2006-03-07 15:34:26 EST
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Description Tom Horsley 2006-03-07 07:33:55 EST
Description of problem:

An 8 port serial board won't work without recompiling kernel to bump the
number of "non-legacy" serial ports supported. This particular board is
a vscom board from byterunner, but with the kernel insisting there are no
more than 4 serial ports ever, I'm sure other boards would have the same
problem. These boards are not that uncommon and I don't see how it could
hurt anything to allow then to work without having to rebuild the kernel.

Version-Release number of selected component (if applicable):


How reproducible:

Always

Steps to Reproduce:
1. Install board
2. See only 4 /dev/ttyS* devices show up.
3.
  
Actual results:


Expected results:

All 8 of 'em.

Additional info:

I put x86_64 in the platform field, but I imagine this is common to
all platforms.
Comment 1 Dave Jones 2006-03-07 15:34:26 EST
it's runtime configurable by booting with 8250.nr_uarts=8 (or however many you
need).  In the future, we'll find a way to make this automatic based upon
hardware detection.
Comment 2 Tom Horsley 2006-03-07 18:31:46 EST
Thanks muchly. I'll see if I can get byterunner to put this info on their
support site where folks like me can find it :-). Works great, I can talk
to all my serial ports now after adding the boot parameter (much simpler than
rebuilding the kernel :-).

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