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Subject[PATCH 04/16] staging: vchiq_arm: use list_for_each_entry when accessing bulk_waiter_list
Date
The resulting code is way more readeable and intuitive compared to plain
list_for_each.

Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
---
.../interface/vchiq_arm/vchiq_arm.c | 52 ++++++-------------
1 file changed, 16 insertions(+), 36 deletions(-)

diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c
index d88dd7415e1e..5f55c708ade8 100644
--- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c
+++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c
@@ -280,16 +280,11 @@ VCHIQ_STATUS_T vchiq_shutdown(VCHIQ_INSTANCE_T instance)
"%s(%p): returning %d", __func__, instance, status);

if (status == VCHIQ_SUCCESS) {
- struct list_head *pos, *next;
+ struct bulk_waiter_node *waiter, *next;

- list_for_each_safe(pos, next,
- &instance->bulk_waiter_list) {
- struct bulk_waiter_node *waiter;
-
- waiter = list_entry(pos,
- struct bulk_waiter_node,
- list);
- list_del(pos);
+ list_for_each_entry_safe(waiter, next,
+ &instance->bulk_waiter_list, list) {
+ list_del(&waiter->list);
vchiq_log_info(vchiq_arm_log_level,
"bulk_waiter - cleaned up %pK for pid %d",
waiter, waiter->pid);
@@ -473,7 +468,6 @@ vchiq_blocking_bulk_transfer(VCHIQ_SERVICE_HANDLE_T handle, void *data,
VCHIQ_SERVICE_T *service;
VCHIQ_STATUS_T status;
struct bulk_waiter_node *waiter = NULL;
- struct list_head *pos;

service = find_service_by_handle(handle);
if (!service)
@@ -484,13 +478,9 @@ vchiq_blocking_bulk_transfer(VCHIQ_SERVICE_HANDLE_T handle, void *data,
unlock_service(service);

mutex_lock(&instance->bulk_waiter_list_mutex);
- list_for_each(pos, &instance->bulk_waiter_list) {
- if (list_entry(pos, struct bulk_waiter_node,
- list)->pid == current->pid) {
- waiter = list_entry(pos,
- struct bulk_waiter_node,
- list);
- list_del(pos);
+ list_for_each_entry(waiter, &instance->bulk_waiter_list, list) {
+ if (waiter->pid == current->pid) {
+ list_del(&waiter->list);
break;
}
}
@@ -1135,21 +1125,16 @@ vchiq_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
ret = -ENOMEM;
break;
}
+
args.userdata = &waiter->bulk_waiter;
} else if (args.mode == VCHIQ_BULK_MODE_WAITING) {
- struct list_head *pos;
-
mutex_lock(&instance->bulk_waiter_list_mutex);
- list_for_each(pos, &instance->bulk_waiter_list) {
- if (list_entry(pos, struct bulk_waiter_node,
- list)->pid == current->pid) {
- waiter = list_entry(pos,
- struct bulk_waiter_node,
- list);
- list_del(pos);
+ list_for_each_entry(waiter, &instance->bulk_waiter_list,
+ list) {
+ if (waiter->pid == current->pid) {
+ list_del(&waiter->list);
break;
}
-
}
mutex_unlock(&instance->bulk_waiter_list_mutex);
if (!waiter) {
@@ -2158,16 +2143,11 @@ vchiq_release(struct inode *inode, struct file *file)
vchiq_release_internal(instance->state, NULL);

{
- struct list_head *pos, *next;
-
- list_for_each_safe(pos, next,
- &instance->bulk_waiter_list) {
- struct bulk_waiter_node *waiter;
+ struct bulk_waiter_node *waiter, *next;

- waiter = list_entry(pos,
- struct bulk_waiter_node,
- list);
- list_del(pos);
+ list_for_each_entry_safe(waiter, next,
+ &instance->bulk_waiter_list, list) {
+ list_del(&waiter->list);
vchiq_log_info(vchiq_arm_log_level,
"bulk_waiter - cleaned up %pK for pid %d",
waiter, waiter->pid);
--
2.19.1
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