diff options
author | Daniel Vetter <daniel.vetter@ffwll.ch> | 2016-10-25 10:06:04 +0200 |
---|---|---|
committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2016-10-25 10:06:04 +0200 |
commit | 0fc4f78f44e6c6148cee32456f0d0023ec1c1fd8 (patch) | |
tree | 71c906207227dd8753a0191db9304035ec3471a4 /arch/arm/kernel/devtree.c | |
parent | 78010cd9736ec571796f4404524ed575b81238b9 (diff) | |
parent | 5481e27f6fd06b7cb902072e81d6b083db8155eb (diff) |
Merge remote-tracking branch 'airlied/drm-next' into topic/drm-misc
Backmerge latest drm-next to have a baseline for the
s/fence/dma_fence/ patch from Chris.
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Diffstat (limited to 'arch/arm/kernel/devtree.c')
-rw-r--r-- | arch/arm/kernel/devtree.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/arch/arm/kernel/devtree.c b/arch/arm/kernel/devtree.c index 40ecd5f514a2..f676febbb270 100644 --- a/arch/arm/kernel/devtree.c +++ b/arch/arm/kernel/devtree.c @@ -88,6 +88,8 @@ void __init arm_dt_init_cpu_maps(void) return; for_each_child_of_node(cpus, cpu) { + const __be32 *cell; + int prop_bytes; u32 hwid; if (of_node_cmp(cpu->type, "cpu")) @@ -99,7 +101,8 @@ void __init arm_dt_init_cpu_maps(void) * properties is considered invalid to build the * cpu_logical_map. */ - if (of_property_read_u32(cpu, "reg", &hwid)) { + cell = of_get_property(cpu, "reg", &prop_bytes); + if (!cell || prop_bytes < sizeof(*cell)) { pr_debug(" * %s missing reg property\n", cpu->full_name); of_node_put(cpu); @@ -107,10 +110,15 @@ void __init arm_dt_init_cpu_maps(void) } /* - * 8 MSBs must be set to 0 in the DT since the reg property + * Bits n:24 must be set to 0 in the DT since the reg property * defines the MPIDR[23:0]. */ - if (hwid & ~MPIDR_HWID_BITMASK) { + do { + hwid = be32_to_cpu(*cell++); + prop_bytes -= sizeof(*cell); + } while (!hwid && prop_bytes > 0); + + if (prop_bytes || (hwid & ~MPIDR_HWID_BITMASK)) { of_node_put(cpu); return; } |