From: arnd@arndb.de (Arnd Bergmann)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 0/3] [ARM] tegra: PCI Express support
Date: Sun, 19 Sep 2010 19:09:46 +0200 [thread overview]
Message-ID: <201009191909.46371.arnd@arndb.de> (raw)
In-Reply-To: <20100919164040.GG9098@n2100.arm.linux.org.uk>
On Sunday 19 September 2010 18:40:40 Russell King - ARM Linux wrote:
> which works fine - and yes, if you insert an ISA driver it probably will
> crash. But then you can crash an x86 PC by using setserial to define
> a serial port at a wrong address.
Sure, if you build the kernel just for one machine, there is no reason
to include code that tries to access fixed I/O ports.
What I'm more worried about is that as we're moving to multi-platform
kernels you want to build for other hardware, e.g. one that has
a PC-style keyboard controller and one that has a funny mapping like that.
Normally, the driver for the keyboard controller should just access
the well-known port number and not find anything there, because PCI
devices are mapped above port 0x1000. What you get instead is a kernel
NULL pointer access.
Arnd
next prev parent reply other threads:[~2010-09-19 17:09 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-16 16:53 [PATCH 0/3] [ARM] tegra: PCI Express support Mike Rapoport
2010-09-16 16:53 ` [PATCH 1/3] [ARM] tegra: add PCI Express clocks Mike Rapoport
2010-09-16 21:27 ` Colin Cross
2010-09-16 22:27 ` Mike Rapoport
2010-09-17 0:14 ` Gary King
2010-09-19 7:54 ` Mike Rapoport
2010-09-16 23:53 ` Mogambo Park
2010-09-19 7:52 ` Mike Rapoport
2010-09-16 16:53 ` [PATCH 2/3] [ARM] tegra: add PCI Express support Mike Rapoport
2010-09-16 21:42 ` Colin Cross
2010-09-16 22:16 ` Mike Rapoport
2010-09-16 16:53 ` [PATCH 3/3] [ARM] tegra: harmony: enable PCI Express Mike Rapoport
2010-09-16 21:44 ` Colin Cross
2010-09-16 21:57 ` Mike Rapoport
2010-09-16 17:12 ` [PATCH 0/3] [ARM] tegra: PCI Express support Arnd Bergmann
2010-09-19 14:07 ` Mike Rapoport
2010-09-19 14:39 ` Arnd Bergmann
2010-09-19 15:02 ` Russell King - ARM Linux
2010-09-19 16:34 ` Arnd Bergmann
2010-09-19 16:40 ` Russell King - ARM Linux
2010-09-19 17:09 ` Arnd Bergmann [this message]
2010-09-19 15:36 ` Mike Rapoport
2010-09-19 16:01 ` Russell King - ARM Linux
2010-09-20 7:15 ` Mike Rapoport
2010-09-20 9:13 ` Arnd Bergmann
2010-09-20 9:58 ` Russell King - ARM Linux
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