From: linux@arm.linux.org.uk (Russell King - ARM Linux)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] clkdev: add support to lookup for early platform device
Date: Thu, 28 Apr 2011 09:33:12 +0100 [thread overview]
Message-ID: <20110428083312.GL17290@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <20110428032906.GN29103@game.jcrosoft.org>
On Thu, Apr 28, 2011 at 05:29:06AM +0200, Jean-Christophe PLAGNIOL-VILLARD wrote:
> I use it for gpio drivers that are init during map_io
Why are you initializing hardware during map_io? That's totally crazy.
Don't do that - the new mappings won't be flushed out of the cache/tlb
at that point, so it's going to be hit and miss whether you can access
the device without locking up the kernel.
Instead, use the early initialization hook which I've recently added for
this stuff, and keep the map_io for _only_ doing what the name says.
next prev parent reply other threads:[~2011-04-28 8:33 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-20 14:05 [PATCH] clkdev: add support to lookup for early platform device Jean-Christophe PLAGNIOL-VILLARD
2011-04-27 8:42 ` Russell King - ARM Linux
2011-04-27 10:31 ` Jean-Christophe PLAGNIOL-VILLARD
2011-04-27 10:47 ` Jean-Christophe PLAGNIOL-VILLARD
2011-04-27 15:00 ` Jean-Christophe PLAGNIOL-VILLARD
2011-04-27 22:12 ` Greg KH
2011-04-28 2:09 ` Paul Mundt
2011-04-28 2:45 ` Jean-Christophe PLAGNIOL-VILLARD
2011-04-28 3:08 ` Paul Mundt
2011-04-28 3:17 ` Jean-Christophe PLAGNIOL-VILLARD
2011-04-28 3:20 ` Jean-Christophe PLAGNIOL-VILLARD
2011-04-28 3:35 ` Magnus Damm
2011-04-28 3:29 ` Jean-Christophe PLAGNIOL-VILLARD
2011-04-28 3:44 ` Magnus Damm
2011-04-28 8:33 ` Russell King - ARM Linux [this message]
2011-04-28 9:28 ` Jean-Christophe PLAGNIOL-VILLARD
2011-04-28 3:38 ` Paul Mundt
2011-04-28 4:31 ` Jean-Christophe PLAGNIOL-VILLARD
2011-04-28 4:46 ` Saravana Kannan
2011-04-28 4:50 ` Jean-Christophe PLAGNIOL-VILLARD
2011-04-28 5:12 ` Jean-Christophe PLAGNIOL-VILLARD
2011-04-28 5:47 ` Magnus Damm
2011-04-28 8:35 ` Russell King - ARM Linux
2011-04-28 9:26 ` Jean-Christophe PLAGNIOL-VILLARD
2011-04-28 10:07 ` Russell King - ARM Linux
2011-04-28 11:19 ` Jean-Christophe PLAGNIOL-VILLARD
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