[PATCH net-next 04/15] net: dsa: Replace usage of found with dedicated list iterator variable

Jakob Koschel
2022-04-07T10:33:33Z

To move the list iterator variable into the list_for_each_entry_*()
macro in the future it should be avoided to use the list iterator
variable after the loop body.

To *never* use the list iterator variable after the loop it was
concluded to use a separate iterator variable instead of a
found boolean [1].

This removes the need to use a found variable and simply checking if
the variable was set, can determine if the break/goto was hit.

Link: https://lore.kernel.org/all/CAHk-=wgRr_D8CB-D9Kg-c=EHreAsk5SqXPwr9Y7k9sA6cWXJ6w@mail.gmail.com/ [1]
Signed-off-by: Jakob Koschel <jakobkoschel@gmail.com>
---
net/dsa/dsa.c | 11 +++++------
1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/net/dsa/dsa.c b/net/dsa/dsa.c
index 89c6c86e746f..645522c4dd4a 100644
--- a/net/dsa/dsa.c
+++ b/net/dsa/dsa.c
@@ -112,22 +112,21 @@ const struct dsa_device_ops *dsa_find_tagger_by_name(const char *buf)

const struct dsa_device_ops *dsa_tag_driver_get(int tag_protocol)
{
- struct dsa_tag_driver *dsa_tag_driver;
+ struct dsa_tag_driver *dsa_tag_driver = NULL, *iter;
const struct dsa_device_ops *ops;
- bool found = false;

request_module("%s%d", DSA_TAG_DRIVER_ALIAS, tag_protocol);

mutex_lock(&dsa_tag_drivers_lock);
- list_for_each_entry(dsa_tag_driver, &dsa_tag_drivers_list, list) {
- ops = dsa_tag_driver->ops;
+ list_for_each_entry(iter, &dsa_tag_drivers_list, list) {
+ ops = iter->ops;
if (ops->proto == tag_protocol) {
- found = true;
+ dsa_tag_driver = iter;
break;
}
}

- if (found) {
+ if (dsa_tag_driver) {
if (!try_module_get(dsa_tag_driver->owner))
ops = ERR_PTR(-ENOPROTOOPT);
} else {
--
2.25.1