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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:
Thomas Falcon 2014-08-19 15:44:57 -05:00 committed by Michael Ellerman
parent 2ce7598c9a
commit c9ac408bc7
1 changed files with 19 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

36
arch/powerpc/platforms/pseries/hotplug-memory.c
View File

@ -113,7 +113,7 @@ out:
static int pseries_remove_mem_node(struct device_node *np)
{
const char *type;
const unsigned int *regs;
const __be32 *regs;
unsigned long base;
unsigned int lmb_size;
int ret = -EINVAL;
@ -132,8 +132,8 @@ static int pseries_remove_mem_node(struct device_node *np)
if (!regs)
return ret;
base = *(unsigned long *)regs;
lmb_size = regs[3];
base = be64_to_cpu(*(unsigned long *)regs);
lmb_size = be32_to_cpu(regs[3]);
pseries_remove_memblock(base, lmb_size);
return 0;
@ -153,7 +153,7 @@ static inline int pseries_remove_mem_node(struct device_node *np)
static int pseries_add_mem_node(struct device_node *np)
{
const char *type;
const unsigned int *regs;
const __be32 *regs;
unsigned long base;
unsigned int lmb_size;
int ret = -EINVAL;
@ -172,8 +172,8 @@ static int pseries_add_mem_node(struct device_node *np)
if (!regs)
return ret;
base = *(unsigned long *)regs;
lmb_size = regs[3];
base = be64_to_cpu(*(unsigned long *)regs);
lmb_size = be32_to_cpu(regs[3]);
/*
* Update memory region to represent the memory add
@ -187,14 +187,14 @@ static int pseries_update_drconf_memory(struct of_prop_reconfig *pr)
struct of_drconf_cell *new_drmem, *old_drmem;
unsigned long memblock_size;
u32 entries;
u32 *p;
__be32 *p;
int i, rc = -EINVAL;
memblock_size = pseries_memory_block_size();
if (!memblock_size)
return -EINVAL;
p = (u32 *) pr->old_prop->value;
p = (__be32 *) pr->old_prop->value;
if (!p)
return -EINVAL;
@ -203,28 +203,30 @@ static int pseries_update_drconf_memory(struct of_prop_reconfig *pr)
* entries. Get the niumber of entries and skip to the array of
* of_drconf_cell's.
*/
entries = *p++;
entries = be32_to_cpu(*p++);
old_drmem = (struct of_drconf_cell *)p;
p = (u32 *)pr->prop->value;
p = (__be32 *)pr->prop->value;
p++;
new_drmem = (struct of_drconf_cell *)p;
for (i = 0; i < entries; i++) {
if ((old_drmem[i].flags & DRCONF_MEM_ASSIGNED) &&
(!(new_drmem[i].flags & DRCONF_MEM_ASSIGNED))) {
rc = pseries_remove_memblock(old_drmem[i].base_addr,
if ((be32_to_cpu(old_drmem[i].flags) & DRCONF_MEM_ASSIGNED) &&
(!(be32_to_cpu(new_drmem[i].flags) & DRCONF_MEM_ASSIGNED))) {
rc = pseries_remove_memblock(
be64_to_cpu(old_drmem[i].base_addr),
memblock_size);
break;
} else if ((!(old_drmem[i].flags & DRCONF_MEM_ASSIGNED)) &&
(new_drmem[i].flags & DRCONF_MEM_ASSIGNED)) {
rc = memblock_add(old_drmem[i].base_addr,
} else if ((!(be32_to_cpu(old_drmem[i].flags) &
DRCONF_MEM_ASSIGNED)) &&
(be32_to_cpu(new_drmem[i].flags) &
DRCONF_MEM_ASSIGNED)) {
rc = memblock_add(be64_to_cpu(old_drmem[i].base_addr),
memblock_size);
rc = (rc < 0) ? -EINVAL : 0;
break;
}
}
return rc;
}