pseries: Fix endian issues in cpu hot-removal

When removing a cpu, this patch makes sure that values
gotten from or passed to firmware are in the correct
endian format.

Signed-off-by: Thomas Falcon <tlfalcon@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

diff --git a/arch/powerpc/platforms/pseries/dlpar.c b/arch/powerpc/platforms/pseries/dlpar.c
index 0963378..fdf01b6 100644 (file)
--- a/arch/powerpc/platforms/pseries/dlpar.c
+++ b/arch/powerpc/platforms/pseries/dlpar.c
@@ -445,7 +445,8 @@ static int dlpar_offline_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)
@@ -455,8 +456,9 @@ static int dlpar_offline_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;
 
                        if (get_cpu_current_state(cpu) == CPU_STATE_OFFLINE)
@@ -478,14 +480,14 @@ static int dlpar_offline_cpu(struct device_node *dn)
                         * Upgrade it's state to CPU_STATE_OFFLINE.
                         */
                        set_preferred_offline_state(cpu, CPU_STATE_OFFLINE);
-                       BUG_ON(plpar_hcall_norets(H_PROD, intserv[i])
+                       BUG_ON(plpar_hcall_norets(H_PROD, thread)
                                                                != H_SUCCESS);
                        __cpu_die(cpu);
                        break;
                }
                if (cpu == num_possible_cpus())
                        printk(KERN_WARNING "Could not find cpu to offline "
-                              "with physical id 0x%x\n", intserv[i]);
+                              "with physical id 0x%x\n", thread);
        }
        cpu_maps_update_done();
 
@@ -497,15 +499,15 @@ out:
 static ssize_t dlpar_cpu_release(const char *buf, size_t count)
 {
        struct device_node *dn;
-       const u32 *drc_index;
+       u32 drc_index;
        int rc;
 
        dn = of_find_node_by_path(buf);
        if (!dn)
                return -EINVAL;
 
-       drc_index = of_get_property(dn, "ibm,my-drc-index", NULL);
-       if (!drc_index) {
+       rc = of_property_read_u32(dn, "ibm,my-drc-index", &drc_index);
+       if (rc) {
                of_node_put(dn);
                return -EINVAL;
        }
@@ -516,7 +518,7 @@ static ssize_t dlpar_cpu_release(const char *buf, size_t count)
                return -EINVAL;
        }
 
-       rc = dlpar_release_drc(*drc_index);
+       rc = dlpar_release_drc(drc_index);
        if (rc) {
                of_node_put(dn);
                return rc;
@@ -524,7 +526,7 @@ static ssize_t dlpar_cpu_release(const char *buf, size_t count)
 
        rc = dlpar_detach_node(dn);
        if (rc) {
-               dlpar_acquire_drc(*drc_index);
+               dlpar_acquire_drc(drc_index);
                return rc;
        }
 

diff --git a/arch/powerpc/platforms/pseries/hotplug-cpu.c b/arch/powerpc/platforms/pseries/hotplug-cpu.c
index 20d6297..b174fa7 100644 (file)
--- a/arch/powerpc/platforms/pseries/hotplug-cpu.c
+++ b/arch/powerpc/platforms/pseries/hotplug-cpu.c
@@ -90,7 +90,7 @@ static void rtas_stop_self(void)
 {
        static struct rtas_args args = {
                .nargs = 0,
-               .nret = 1,
+               .nret = cpu_to_be32(1),
                .rets = &args.args[0],
        };
 
@@ -312,7 +312,8 @@ static void pseries_remove_processor(struct device_node *np)
 {
        unsigned int cpu;
        int len, nthreads, i;
-       const u32 *intserv;
+       const __be32 *intserv;
+       u32 thread;
 
        intserv = of_get_property(np, "ibm,ppc-interrupt-server#s", &len);
        if (!intserv)
@@ -322,8 +323,9 @@ static void pseries_remove_processor(struct device_node *np)
 
        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(cpu_online(cpu));
                        set_cpu_present(cpu, false);
@@ -332,7 +334,7 @@ static void pseries_remove_processor(struct device_node *np)
                }
                if (cpu >= nr_cpu_ids)
                        printk(KERN_WARNING "Could not find cpu to remove "
-                              "with physical id 0x%x\n", intserv[i]);
+                              "with physical id 0x%x\n", thread);
        }
        cpu_maps_update_done();
 }