From: Will Deacon <will.deacon@arm.com>
Date: Wed, 20 Jul 2011 10:57:03 +0000 (+0100)
Subject: ARM: realview: ensure visibility of writes during reset
X-Git-Tag: v3.1-rc5~9^2~13^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5cb843ca0f781b62dc9793b26926d0b8efef5576;p=pandora-kernel.git

ARM: realview: ensure visibility of writes during reset

The various reset routines in mach-realview rely on an FPGA to
power-cycle the board after writing some magic runes to memory-mapped
registers.

This patch adds a dsb() following the writes, so that they become
visible before we mdelay(1000) in the arch_reset code. Without this
patch, the timeout would expire sporadically, causing the reset to fail.

Signed-off-by: Will Deacon <will.deacon@arm.com>
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