From: Matthias Urlichs <smurf@noris.de>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>, D.A.Fedorov@inp.nsk.su
Cc: alan@lxorguk.ukuu.org.uk (Alan Cox),
balbir_soni@yahoo.com (Balbir Singh),
linux-kernel@vger.kernel.org
Subject: Re: Is it useful to support user level drivers
Date: Thu, 21 Jun 2001 16:03:49 +0200 [thread overview]
Message-ID: <p05100305b757ae11c10d@[10.2.6.42]> (raw)
In-Reply-To: <E15D4VG-0001Lw-00@the-village.bc.nu>
In-Reply-To: <E15D4VG-0001Lw-00@the-village.bc.nu>
At 14:28 +0100 2001-06-21, Alan Cox wrote:
>No. The IRQ might be shared, and you get a slight problem if you just disabled
>an IRQ needed to make progress for user space to handle the IRQ
Two choices:
- Disallow shared interrupts for usermode drivers.
- Make the 'generic interrupt handler device driver' configurable
and/or module-extensible. You only need three entry points
("Interrupt set?"/"Enable interrupts"/"Disable interrupts"), which is
reasonably simple to get right.
--
Matthias Urlichs
next prev parent reply other threads:[~2001-06-21 14:06 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-06-21 10:41 Balbir Singh
2001-06-21 10:55 ` Tim Waugh
2001-06-21 11:04 ` Alan Cox
2001-06-21 12:43 ` Balbir Singh
2001-06-21 13:27 ` Alan Cox
2001-06-28 22:52 ` Pavel Machek
2001-06-21 12:45 ` Dmitry A. Fedorov
2001-06-21 13:24 ` Oliver Neukum
2001-06-21 14:46 ` Dmitry A. Fedorov
2001-06-21 15:19 ` Oliver Neukum
2001-06-22 4:19 ` Dmitry A. Fedorov
2001-06-22 7:28 ` Balbir Singh
2001-06-21 16:34 ` Abramo Bagnara
2001-06-21 17:27 ` Alan Cox
2001-06-21 19:59 ` Abramo Bagnara
2001-06-21 20:40 ` Richard B. Johnson
2001-06-21 20:54 ` Abramo Bagnara
2001-06-21 21:09 ` Oliver Neukum
2001-06-28 22:57 ` Pavel Machek
2001-06-21 13:28 ` Alan Cox
2001-06-21 14:03 ` Matthias Urlichs [this message]
2001-06-28 22:54 ` Pavel Machek
2001-06-21 14:20 ` Dmitry A. Fedorov
2001-06-21 11:38 ` Dmitry A. Fedorov
2001-06-21 13:50 ` john slee
2001-06-21 13:58 ` Matthias Urlichs
2001-06-21 14:21 ` john slee
2001-06-28 22:51 ` Pavel Machek
[not found] <mailman.993156181.18994.linux-kernel2news@redhat.com>
2001-06-21 22:06 ` Pete Zaitcev
2001-06-21 23:40 ` Richard B. Johnson
2001-06-22 0:30 ` Anders Larsen
2001-06-22 0:43 ` Richard B. Johnson
2001-06-25 0:06 ` Anders Larsen
2001-06-21 22:20 ` David S. Miller
2001-06-21 23:09 ` Mike Mackovitch
2001-06-21 23:22 ` David S. Miller
2001-06-21 23:50 ` Mike Mackovitch
2001-06-22 0:36 ` David S. Miller
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