diff options
Diffstat (limited to 'target/linux/mvebu/patches-3.10/0033-arm-mvebu-fix-coherency_late_init-for-multiplatform.patch')
| -rw-r--r-- | target/linux/mvebu/patches-3.10/0033-arm-mvebu-fix-coherency_late_init-for-multiplatform.patch | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/target/linux/mvebu/patches-3.10/0033-arm-mvebu-fix-coherency_late_init-for-multiplatform.patch b/target/linux/mvebu/patches-3.10/0033-arm-mvebu-fix-coherency_late_init-for-multiplatform.patch new file mode 100644 index 0000000000..21fad3e856 --- /dev/null +++ b/target/linux/mvebu/patches-3.10/0033-arm-mvebu-fix-coherency_late_init-for-multiplatform.patch @@ -0,0 +1,41 @@ +From 3891658a01af7e875d4c176ebb5d713d74a6e998 Mon Sep 17 00:00:00 2001 +From: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> +Date: Thu, 20 Jun 2013 09:45:26 +0200 +Subject: [PATCH 033/203] arm: mvebu: fix coherency_late_init() for + multiplatform + +As noticed by Arnaud Patard (Rtp) <arnaud.patard@rtp-net.org>, commit +865e0527d2d7 ('arm: mvebu: avoid hardcoded virtual address in +coherency code') added a postcore_initcall() to register the bus +notifier that the mvebu code needs to apply correct DMA operations on +its platform devices breaks the multiplatform boot on other platforms, +because the bus notifier registration is unconditional. + +This commit fixes that by registering the bus notifier only if we have +the mvebu coherency unit described in the Device Tree. The conditional +used is exactly the same in which the bus_register_notifier() call was +originally enclosed before 865e0527d2d7 ('arm: mvebu: avoid hardcoded +virtual address in coherency code'). + +Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> +Reported-by: Arnaud Patard (Rtp) <arnaud.patard@rtp-net.org> +Acked-by: Andrew Lunn <andrew@lunn.ch> +Signed-off-by: Jason Cooper <jason@lakedaemon.net> +--- + arch/arm/mach-mvebu/coherency.c | 5 +++-- + 1 file changed, 3 insertions(+), 2 deletions(-) + +--- a/arch/arm/mach-mvebu/coherency.c ++++ b/arch/arm/mach-mvebu/coherency.c +@@ -147,8 +147,9 @@ int __init coherency_init(void) + + static int __init coherency_late_init(void) + { +- bus_register_notifier(&platform_bus_type, +- &mvebu_hwcc_platform_nb); ++ if (of_find_matching_node(NULL, of_coherency_table)) ++ bus_register_notifier(&platform_bus_type, ++ &mvebu_hwcc_platform_nb); + return 0; + } + |