Re: [PATCH v2 1/2] pseries: Fix endian issues in onlining cpu threads

[Michael Ellerman]

On Fri, 2014-09-12 at 14:11 -0500, Thomas Falcon wrote:
> The ibm,ppc-interrupt-server#s property is in big endian format.
> These values need to be converted when used by little endian
> architectures.
> 
> Signed-off-by: Thomas Falcon 
> ---
> Changes in v2:
> 
>  Followed suggestions from Michael Ellerman
>conversion of intserv values occur once

Thanks Tom.

I think I saw that you'd already discussed these with Nathan in another thread,
so I'll assume he's OK with them unless he says otherwise.

cheers


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[PATCH v2 1/2] pseries: Fix endian issues in onlining cpu threads

[Thomas Falcon]

The ibm,ppc-interrupt-server#s property is in big endian format.
These values need to be converted when used by little endian
architectures.

Signed-off-by: Thomas Falcon 
---
Changes in v2:

 Followed suggestions from Michael Ellerman
   conversion of intserv values occur once
---
 arch/powerpc/platforms/pseries/dlpar.c | 8 +---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/arch/powerpc/platforms/pseries/dlpar.c 
b/arch/powerpc/platforms/pseries/dlpar.c
index c2806c8..9e9f30b2 100644
--- a/arch/powerpc/platforms/pseries/dlpar.c
+++ b/arch/powerpc/platforms/pseries/dlpar.c
@@ -363,7 +363,8 @@ static int dlpar_online_cpu(struct device_node *dn)
int rc = 0;
unsigned int cpu;
int len, nthreads, i;
-   const u32 *intserv;
+   const __be32 *intserv;
+   u32 thread;
 
intserv = of_get_property(dn, "ibm,ppc-interrupt-server#s", &len);
if (!intserv)
@@ -373,8 +374,9 @@ static int dlpar_online_cpu(struct device_node *dn)
 
cpu_maps_update_begin();
for (i = 0; i < nthreads; i++) {
+   thread = be32_to_cpu(intserv[i]);
for_each_present_cpu(cpu) {
-   if (get_hard_smp_processor_id(cpu) != intserv[i])
+   if (get_hard_smp_processor_id(cpu) != thread)
continue;
BUG_ON(get_cpu_current_state(cpu)
!= CPU_STATE_OFFLINE);
@@ -388,7 +390,7 @@ static int dlpar_online_cpu(struct device_node *dn)
}
if (cpu == num_possible_cpus())
printk(KERN_WARNING "Could not find cpu to online "
-  "with physical id 0x%x\n", intserv[i]);
+  "with physical id 0x%x\n", thread);
}
cpu_maps_update_done();
 
-- 
1.8.5.2

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