Merge branch 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm

Pull ARM fixes from Russell King:
 "Three relatively small fixes for ARM:

   - Roger noticed that dma_max_pfn() was calculating the upper limit
     wrongly, by adding the PFN offset of memory twice.

   - A fix from Robin to correct parsing of MPIDR values when the
     address size is larger than one BE32 unit.

   - A fix from Srinivas to ensure that we do not rely on the boot
     loader (or previous Linux kernel) setting the translation table
     base register a certain way in the decompressor, which can lead to
     crashes"

* 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm:
  ARM: 8618/1: decompressor: reset ttbcr fields to use TTBR0 on ARMv7
  ARM: 8617/1: dma: fix dma_max_pfn()
  ARM: 8616/1: dt: Respect property size when parsing CPUs

diff --git a/arch/arm/boot/compressed/head.S b/arch/arm/boot/compressed/head.S
index af11c2f..fc6d541 100644 (file)
--- a/arch/arm/boot/compressed/head.S
+++ b/arch/arm/boot/compressed/head.S
@@ -779,7 +779,7 @@ __armv7_mmu_cache_on:
                orrne   r0, r0, #1              @ MMU enabled
                movne   r1, #0xfffffffd         @ domain 0 = client
                bic     r6, r6, #1 << 31        @ 32-bit translation system
-               bic     r6, r6, #3 << 0         @ use only ttbr0
+               bic     r6, r6, #(7 << 0) | (1 << 4)    @ use only ttbr0
                mcrne   p15, 0, r3, c2, c0, 0   @ load page table pointer
                mcrne   p15, 0, r1, c3, c0, 0   @ load domain access control
                mcrne   p15, 0, r6, c2, c0, 2   @ load ttb control

diff --git a/arch/arm/include/asm/dma-mapping.h b/arch/arm/include/asm/dma-mapping.h
index d009f79..bf02dbd 100644 (file)
--- a/arch/arm/include/asm/dma-mapping.h
+++ b/arch/arm/include/asm/dma-mapping.h
@@ -111,7 +111,7 @@ static inline dma_addr_t virt_to_dma(struct device *dev, void *addr)
 /* The ARM override for dma_max_pfn() */
 static inline unsigned long dma_max_pfn(struct device *dev)
 {
-       return PHYS_PFN_OFFSET + dma_to_pfn(dev, *dev->dma_mask);
+       return dma_to_pfn(dev, *dev->dma_mask);
 }
 #define dma_max_pfn(dev) dma_max_pfn(dev)
 

diff --git a/arch/arm/kernel/devtree.c b/arch/arm/kernel/devtree.c
index 40ecd5f..f676feb 100644 (file)
--- 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;
                }