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powerpc: make use of for_each_node_by_type() instead of open-coding it

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Instead of manually coding the loop with of_find_node_by_type(), let's
switch to the standard macro for iterating over nodes with given type.

Also fixed a couple of refcount leaks in the aforementioned loops.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Dmitry Torokhov 2017-01-31 17:54:38 -08:00 committed by Michael Ellerman
parent 94d3084a0f
commit 9625e69a38
5 changed files with 17 additions and 11 deletions
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9
arch/powerpc/kernel/setup-common.c
View File

@ -470,13 +470,13 @@ static void __init cpu_init_thread_core_maps(int tpc)
*/
void __init smp_setup_cpu_maps(void)
{
struct device_node *dn = NULL;
struct device_node *dn;
int cpu = 0;
int nthreads = 1;
DBG("smp_setup_cpu_maps()\n");
while ((dn = of_find_node_by_type(dn, "cpu")) && cpu < nr_cpu_ids) {
for_each_node_by_type(dn, "cpu") {
const __be32 *intserv;
__be32 cpu_be;
int j, len;
@ -516,6 +516,11 @@ void __init smp_setup_cpu_maps(void)
set_cpu_possible(cpu, true);
cpu++;
}
if (cpu >= nr_cpu_ids) {
of_node_put(dn);
break;
}
}
/* If no SMT supported, nthreads is forced to 1 */

4
arch/powerpc/platforms/cell/spu_manage.c
View File

@ -292,12 +292,12 @@ static int __init of_enumerate_spus(int (*fn)(void *data))
unsigned int n = 0;
ret = -ENODEV;
for (node = of_find_node_by_type(NULL, "spe");
node; node = of_find_node_by_type(node, "spe")) {
for_each_node_by_type(node, "spe") {
ret = fn(node);
if (ret) {
printk(KERN_WARNING "%s: Error initializing %s\n",
__func__, node->name);
of_node_put(node);
break;
}
n++;

7
arch/powerpc/platforms/powermac/pic.c
View File

@ -486,15 +486,16 @@ static int __init pmac_pic_probe_mpic(void)
struct device_node *np, *master = NULL, *slave = NULL;
/* We can have up to 2 MPICs cascaded */
for (np = NULL; (np = of_find_node_by_type(np, "open-pic"))
!= NULL;) {
for_each_node_by_type(np, "open-pic") {
if (master == NULL &&
of_get_property(np, "interrupts", NULL) == NULL)
master = of_node_get(np);
else if (slave == NULL)
slave = of_node_get(np);
if (master && slave)
if (master && slave) {
of_node_put(np);
break;
}
}
/* Check for bogus setups */

4
arch/powerpc/platforms/powermac/smp.c
View File

@ -774,8 +774,8 @@ static void __init smp_core99_probe(void)
if (ppc_md.progress) ppc_md.progress("smp_core99_probe", 0x345);
/* Count CPUs in the device-tree */
for (cpus = NULL; (cpus = of_find_node_by_type(cpus, "cpu")) != NULL;)
++ncpus;
for_each_node_by_type(cpus, "cpu")
++ncpus;
printk(KERN_INFO "PowerMac SMP probe found %d cpus\n", ncpus);

4
arch/powerpc/platforms/pseries/lparcfg.c
View File

@ -370,10 +370,10 @@ static void parse_system_parameter_string(struct seq_file *m)
*/
static int lparcfg_count_active_processors(void)
{
struct device_node *cpus_dn = NULL;
struct device_node *cpus_dn;
int count = 0;
while ((cpus_dn = of_find_node_by_type(cpus_dn, "cpu"))) {
for_each_node_by_type(cpus_dn, "cpu") {
#ifdef LPARCFG_DEBUG
printk(KERN_ERR "cpus_dn %p\n", cpus_dn);
#endif