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powerpc/kernel: Use of_property_read_u32() in rtas_initialize()

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This uses of_property_read_u32() in rtas_initialize() so that we
needn't explicitly care the CPU's endian.

Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Gavin Shan 2017-01-24 09:49:53 +11:00 • committed by Michael Ellerman
parent dbecd50930
commit de6d2d1b7b
1 changed files with 9 additions and 11 deletions
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20
arch/powerpc/kernel/rtas.c
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@ -1145,7 +1145,8 @@ asmlinkage int ppc_rtas(struct rtas_args __user *uargs)
void __init rtas_initialize(void) void __init rtas_initialize(void)
{ {
unsigned long rtas_region = RTAS_INSTANTIATE_MAX; unsigned long rtas_region = RTAS_INSTANTIATE_MAX;
const __be32 *basep, *entryp, *sizep; u32 base, size, entry;
int no_base, no_size, no_entry;
/* Get RTAS dev node and fill up our "rtas" structure with infos /* Get RTAS dev node and fill up our "rtas" structure with infos
* about it. * about it.
@ -1154,20 +1155,17 @@ void __init rtas_initialize(void)
if (!rtas.dev) if (!rtas.dev)
return; return;
basep = of_get_property(rtas.dev, "linux,rtas-base", NULL); no_base = of_property_read_u32(rtas.dev, "linux,rtas-base", &base);
sizep = of_get_property(rtas.dev, "rtas-size", NULL); no_size = of_property_read_u32(rtas.dev, "rtas-size", &size);
if (basep == NULL || sizep == NULL) { if (no_base || no_size) {
rtas.dev = NULL; rtas.dev = NULL;
return; return;
} }
rtas.base = __be32_to_cpu(*basep); rtas.base = base;
rtas.size = __be32_to_cpu(*sizep); rtas.size = size;
entryp = of_get_property(rtas.dev, "linux,rtas-entry", NULL); no_entry = of_property_read_u32(rtas.dev, "linux,rtas-entry", &entry);
if (entryp == NULL) /* Ugh */ rtas.entry = no_entry ? rtas.base : entry;
rtas.entry = rtas.base;
else
rtas.entry = __be32_to_cpu(*entryp);
/* If RTAS was found, allocate the RMO buffer for it and look for /* If RTAS was found, allocate the RMO buffer for it and look for
* the stop-self token if any * the stop-self token if any