42 lines
1.7 KiB
Diff
42 lines
1.7 KiB
Diff
From 3891658a01af7e875d4c176ebb5d713d74a6e998 Mon Sep 17 00:00:00 2001
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From: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
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Date: Thu, 20 Jun 2013 09:45:26 +0200
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Subject: [PATCH 033/203] arm: mvebu: fix coherency_late_init() for
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multiplatform
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As noticed by Arnaud Patard (Rtp) <arnaud.patard@rtp-net.org>, commit
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865e0527d2d7 ('arm: mvebu: avoid hardcoded virtual address in
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coherency code') added a postcore_initcall() to register the bus
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notifier that the mvebu code needs to apply correct DMA operations on
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its platform devices breaks the multiplatform boot on other platforms,
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because the bus notifier registration is unconditional.
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This commit fixes that by registering the bus notifier only if we have
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the mvebu coherency unit described in the Device Tree. The conditional
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used is exactly the same in which the bus_register_notifier() call was
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originally enclosed before 865e0527d2d7 ('arm: mvebu: avoid hardcoded
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virtual address in coherency code').
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Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
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Reported-by: Arnaud Patard (Rtp) <arnaud.patard@rtp-net.org>
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Acked-by: Andrew Lunn <andrew@lunn.ch>
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Signed-off-by: Jason Cooper <jason@lakedaemon.net>
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---
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arch/arm/mach-mvebu/coherency.c | 5 +++--
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1 file changed, 3 insertions(+), 2 deletions(-)
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--- a/arch/arm/mach-mvebu/coherency.c
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+++ b/arch/arm/mach-mvebu/coherency.c
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@@ -147,8 +147,9 @@ int __init coherency_init(void)
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static int __init coherency_late_init(void)
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{
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- bus_register_notifier(&platform_bus_type,
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- &mvebu_hwcc_platform_nb);
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+ if (of_find_matching_node(NULL, of_coherency_table))
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+ bus_register_notifier(&platform_bus_type,
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+ &mvebu_hwcc_platform_nb);
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return 0;
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}
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