path: root/arch/arm/kernel/devtree.c
diff options
authorLinus Torvalds <torvalds@linux-foundation.org>2014-07-30 09:01:04 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-07-30 09:01:04 -0700
commit26bcd8b72563b4c54892c4c2a409f6656fb8ae8b (patch)
treeb6d7f4694d8a619611087b44c9ff6b6ae1340bb3 /arch/arm/kernel/devtree.c
parentacba648dca67c6a224991a9e9f935b2bdec8dc17 (diff)
parent5a12a597a8627b91fd9d94365853f9f69a4f399c (diff)
Merge tag 'devicetree-for-linus' of git://git.secretlab.ca/git/linux
Pull Exynos platform DT fix from Grant Likely: "Device tree Exynos bug fix for v3.16-rc7 This bug fix has been brewing for a while. I hate sending it to you so late, but I only got confirmation that it solves the problem this past weekend. The diff looks big for a bug fix, but the majority of it is only executed in the Exynos quirk case. Unfortunately it required splitting early_init_dt_scan() in two and adding quirk handling in the middle of it on ARM. Exynos has buggy firmware that puts bad data into the memory node. Commit 1c2f87c22566 ("ARM: Get rid of meminfo") exposed the bug by dropping the artificial upper bound on the number of memory banks that can be added. Exynos fails to boot after that commit. This branch fixes it by splitting the early DT parse function and inserting a fixup hook. Exynos uses the hook to correct the DT before parsing memory regions" * tag 'devicetree-for-linus' of git://git.secretlab.ca/git/linux: arm: Add devicetree fixup machine function of: Add memory limiting function for flattened devicetrees of: Split early_init_dt_scan into two parts
Diffstat (limited to 'arch/arm/kernel/devtree.c')
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/arm/kernel/devtree.c b/arch/arm/kernel/devtree.c
index e94a157ddff1..11c54de9f8cf 100644
--- a/arch/arm/kernel/devtree.c
+++ b/arch/arm/kernel/devtree.c
@@ -212,7 +212,7 @@ const struct machine_desc * __init setup_machine_fdt(unsigned int dt_phys)
mdesc_best = &__mach_desc_GENERIC_DT;
- if (!dt_phys || !early_init_dt_scan(phys_to_virt(dt_phys)))
+ if (!dt_phys || !early_init_dt_verify(phys_to_virt(dt_phys)))
return NULL;
mdesc = of_flat_dt_match_machine(mdesc_best, arch_get_next_mach);
@@ -237,6 +237,12 @@ const struct machine_desc * __init setup_machine_fdt(unsigned int dt_phys)
dump_machine_table(); /* does not return */
+ /* We really don't want to do this, but sometimes firmware provides buggy data */
+ if (mdesc->dt_fixup)
+ mdesc->dt_fixup();
+ early_init_dt_scan_nodes();
/* Change machine number to match the mdesc we're using */
__machine_arch_type = mdesc->nr;