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Subject[PATCH v5 11/13] firmware: arm_sdei: Introduce sdei_do_local_call()
Date
During the CPU hotplug, the private events are registered, enabled
or unregistered on the specific CPU. It repeats the same steps:
initializing cross call argument, make function call on local CPU,
check the returned error.

This introduces sdei_do_local_call() to cover the first steps. The
other benefit is to make CROSSCALL_INIT and struct sdei_crosscall_args
are only visible to sdei_do_{cross, local}_call().

Signed-off-by: Gavin Shan <gshan@redhat.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: James Morse <james.morse@arm.com>
---
drivers/firmware/arm_sdei.c | 41 ++++++++++++++++++++++---------------
1 file changed, 25 insertions(+), 16 deletions(-)

diff --git a/drivers/firmware/arm_sdei.c b/drivers/firmware/arm_sdei.c
index 786c1b6d4af3..cf1a37b40e24 100644
--- a/drivers/firmware/arm_sdei.c
+++ b/drivers/firmware/arm_sdei.c
@@ -85,6 +85,17 @@ struct sdei_crosscall_args {
atomic_set(&arg.errors, 0); \
} while (0)

+static inline int sdei_do_local_call(smp_call_func_t fn,
+ struct sdei_event *event)
+{
+ struct sdei_crosscall_args arg;
+
+ CROSSCALL_INIT(arg, event);
+ fn(&arg);
+
+ return arg.first_error;
+}
+
static inline int sdei_do_cross_call(smp_call_func_t fn,
struct sdei_event *event)
{
@@ -677,7 +688,7 @@ static int sdei_reregister_shared(void)
static int sdei_cpuhp_down(unsigned int cpu)
{
struct sdei_event *event;
- struct sdei_crosscall_args arg;
+ int err;

/* un-register private events */
spin_lock(&sdei_list_lock);
@@ -685,12 +696,11 @@ static int sdei_cpuhp_down(unsigned int cpu)
if (event->type == SDEI_EVENT_TYPE_SHARED)
continue;

- CROSSCALL_INIT(arg, event);
- /* call the cross-call function locally... */
- _local_event_unregister(&arg);
- if (arg.first_error)
+ err = sdei_do_local_call(_local_event_unregister, event);
+ if (err) {
pr_err("Failed to unregister event %u: %d\n",
- event->event_num, arg.first_error);
+ event->event_num, err);
+ }
}
spin_unlock(&sdei_list_lock);

@@ -700,7 +710,7 @@ static int sdei_cpuhp_down(unsigned int cpu)
static int sdei_cpuhp_up(unsigned int cpu)
{
struct sdei_event *event;
- struct sdei_crosscall_args arg;
+ int err;

/* re-register/enable private events */
spin_lock(&sdei_list_lock);
@@ -709,20 +719,19 @@ static int sdei_cpuhp_up(unsigned int cpu)
continue;

if (event->reregister) {
- CROSSCALL_INIT(arg, event);
- /* call the cross-call function locally... */
- _local_event_register(&arg);
- if (arg.first_error)
+ err = sdei_do_local_call(_local_event_register, event);
+ if (err) {
pr_err("Failed to re-register event %u: %d\n",
- event->event_num, arg.first_error);
+ event->event_num, err);
+ }
}

if (event->reenable) {
- CROSSCALL_INIT(arg, event);
- _local_event_enable(&arg);
- if (arg.first_error)
+ err = sdei_do_local_call(_local_event_enable, event);
+ if (err) {
pr_err("Failed to re-enable event %u: %d\n",
- event->event_num, arg.first_error);
+ event->event_num, err);
+ }
}
}
spin_unlock(&sdei_list_lock);
--
2.23.0
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