LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: earny@net4u.de
Cc: list-lkml@net4u.de, linux-kernel@vger.kernel.org
Subject: Re: [BUG] pcmcia serial_cs no interrupts
Date: Tue, 13 Nov 2007 17:52:01 +0000	[thread overview]
Message-ID: <20071113175201.72995c65@the-village.bc.nu> (raw)
In-Reply-To: <200711131755.25246.list-lkml@net4u.de>

On Tue, 13 Nov 2007 17:55:25 +0100
Ernst Herzberg <list-lkml@net4u.de> wrote:

> 
> This pcmcia-card (UMTS Modem) only works if it shares his interrupt with
> another device, eg an usb mice. Moving the mice increases the connection
> speed, unplugging hangs the connection.

Thats consistent with the card not generating interrupts, or the
interrupts being misrouted. The serial driver polls the interrupt pending
bits on the chip so the actual serial chip is clearly expecting
interrupts to go somewhere. Given this seems to be card not laptop
specific it looks like there is magic intiialisation gloop required by
this chipset that we don't have.

> At the moment this card is my only way to reach the internet, but here in
> the hospital i have a lot time to test patches;)

You may want to boot with irqpoll that may help a bit.

Some info at: 

A helpful start would be to know if the setserial command (applied to
whatever tty your system calls the card) helps as given in:

https://bugs.launchpad.net/ubuntu/+source/pcmciautils/+bug/99479

  reply	other threads:[~2007-11-13 17:52 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-11-13 16:55 Ernst Herzberg
2007-11-13 17:52 ` Alan Cox [this message]
2007-11-14 14:05   ` Ernst Herzberg

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20071113175201.72995c65@the-village.bc.nu \
    --to=alan@lxorguk.ukuu.org.uk \
    --cc=earny@net4u.de \
    --cc=linux-kernel@vger.kernel.org \
    --cc=list-lkml@net4u.de \
    --subject='Re: [BUG] pcmcia serial_cs no interrupts' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).