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powerpc/pseries: Fix endian issues in memory hotplug
Values acquired from Open Firmware are in 32-bit big endian format and need to be handled on little endian architectures. This patch ensures values are in cpu endian when hotplugging memory. Signed-off-by: Thomas Falcon <tlfalcon@linux.vnet.ibm.com>
This commit is contained in:
parent
2ce7598c9a
commit
c9ac408bc7
1 changed files with 19 additions and 17 deletions
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@ -113,7 +113,7 @@ static int pseries_remove_memblock(unsigned long base, unsigned int memblock_siz
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static int pseries_remove_mem_node(struct device_node *np)
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{
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const char *type;
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const unsigned int *regs;
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const __be32 *regs;
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unsigned long base;
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unsigned int lmb_size;
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int ret = -EINVAL;
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@ -132,8 +132,8 @@ static int pseries_remove_mem_node(struct device_node *np)
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if (!regs)
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return ret;
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base = *(unsigned long *)regs;
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lmb_size = regs[3];
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base = be64_to_cpu(*(unsigned long *)regs);
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lmb_size = be32_to_cpu(regs[3]);
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pseries_remove_memblock(base, lmb_size);
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return 0;
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@ -153,7 +153,7 @@ static inline int pseries_remove_mem_node(struct device_node *np)
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static int pseries_add_mem_node(struct device_node *np)
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{
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const char *type;
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const unsigned int *regs;
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const __be32 *regs;
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unsigned long base;
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unsigned int lmb_size;
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int ret = -EINVAL;
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@ -172,8 +172,8 @@ static int pseries_add_mem_node(struct device_node *np)
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if (!regs)
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return ret;
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base = *(unsigned long *)regs;
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lmb_size = regs[3];
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base = be64_to_cpu(*(unsigned long *)regs);
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lmb_size = be32_to_cpu(regs[3]);
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/*
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* Update memory region to represent the memory add
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@ -187,14 +187,14 @@ static int pseries_update_drconf_memory(struct of_prop_reconfig *pr)
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struct of_drconf_cell *new_drmem, *old_drmem;
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unsigned long memblock_size;
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u32 entries;
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u32 *p;
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__be32 *p;
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int i, rc = -EINVAL;
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memblock_size = pseries_memory_block_size();
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if (!memblock_size)
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return -EINVAL;
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p = (u32 *) pr->old_prop->value;
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p = (__be32 *) pr->old_prop->value;
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if (!p)
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return -EINVAL;
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@ -203,28 +203,30 @@ static int pseries_update_drconf_memory(struct of_prop_reconfig *pr)
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* entries. Get the niumber of entries and skip to the array of
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* of_drconf_cell's.
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*/
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entries = *p++;
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entries = be32_to_cpu(*p++);
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old_drmem = (struct of_drconf_cell *)p;
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p = (u32 *)pr->prop->value;
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p = (__be32 *)pr->prop->value;
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p++;
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new_drmem = (struct of_drconf_cell *)p;
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for (i = 0; i < entries; i++) {
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if ((old_drmem[i].flags & DRCONF_MEM_ASSIGNED) &&
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(!(new_drmem[i].flags & DRCONF_MEM_ASSIGNED))) {
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rc = pseries_remove_memblock(old_drmem[i].base_addr,
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if ((be32_to_cpu(old_drmem[i].flags) & DRCONF_MEM_ASSIGNED) &&
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(!(be32_to_cpu(new_drmem[i].flags) & DRCONF_MEM_ASSIGNED))) {
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rc = pseries_remove_memblock(
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be64_to_cpu(old_drmem[i].base_addr),
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memblock_size);
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break;
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} else if ((!(old_drmem[i].flags & DRCONF_MEM_ASSIGNED)) &&
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(new_drmem[i].flags & DRCONF_MEM_ASSIGNED)) {
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rc = memblock_add(old_drmem[i].base_addr,
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} else if ((!(be32_to_cpu(old_drmem[i].flags) &
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DRCONF_MEM_ASSIGNED)) &&
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(be32_to_cpu(new_drmem[i].flags) &
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DRCONF_MEM_ASSIGNED)) {
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rc = memblock_add(be64_to_cpu(old_drmem[i].base_addr),
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memblock_size);
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rc = (rc < 0) ? -EINVAL : 0;
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break;
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}
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}
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return rc;
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}
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