From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Mark Lord <lkml@rtr.ca>
Cc: Chris Rankin <rankincj@yahoo.com>,
linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org
Subject: Re: Linux 2.6.17: IRQ handler mismatch in serial code?
Date: Mon, 19 Jun 2006 22:06:52 +0100 [thread overview]
Message-ID: <1150751212.2871.44.camel@localhost.localdomain> (raw)
In-Reply-To: <4496FEC2.8050903@rtr.ca>
Ar Llu, 2006-06-19 am 15:45 -0400, ysgrifennodd Mark Lord:
> If the drivers are written "correctly", they shouldn't grab the IRQ
> until someone actually opens the device. Which means they should be
> able the share the IRQ, so long as both devices are not in use (open)
> at the same time.
This is not the case for ISA bus. Most ISA hardware is physically unable
to share and the drivers for such hardware intentionally grab the IRQ at
load time to avoid it being mis-reused.
Alan
next prev parent reply other threads:[~2006-06-19 20:52 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-06-19 18:06 Linux 2.6.17: IRQ handler mismatch in serial code? Chris Rankin
2006-06-19 18:47 ` Russell King
2006-06-19 19:40 ` Chris Rankin
2006-06-19 19:44 ` Russell King
2006-06-20 1:00 ` Adam Belay
2006-06-20 7:50 ` Chris Rankin
2006-06-19 19:45 ` Mark Lord
2006-06-19 21:06 ` Alan Cox [this message]
2006-06-19 21:52 ` Mark Lord
2006-06-19 22:21 ` Alan Cox
[not found] <6pwmi-8mW-1@gated-at.bofh.it>
[not found] ` <6px8R-Y7-43@gated-at.bofh.it>
[not found] ` <6pxV5-2ci-13@gated-at.bofh.it>
[not found] ` <6pz12-3Rg-67@gated-at.bofh.it>
[not found] ` <6pzX4-5jE-19@gated-at.bofh.it>
[not found] ` <6pA6B-5K8-33@gated-at.bofh.it>
2006-06-20 14:39 ` Bodo Eggert
2006-06-20 18:03 ` Russell King
2006-06-20 23:20 ` Bodo Eggert
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