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opp: use list iterator only inside the loop

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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 dedicated pointer variable [1].

In this case, use a new variable 'iter' as the list iterator, while
use the old variable 'new_dev' as a dedicated pointer to point to the
found entry. And BUG_ON(!new_dev);.

[1]: https://lore.kernel.org/all/CAHk-=wgRr_D8CB-D9Kg-c=EHreAsk5SqXPwr9Y7k9sA6cWXJ6w@mail.gmail.com/

Signed-off-by: Xiaomeng Tong <xiam0nd.tong@gmail.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
This commit is contained in:
Xiaomeng Tong 2022-03-31 16:30:18 +08:00 committed by Viresh Kumar
parent 95073b721c
commit c14faabf53
1 changed files with 7 additions and 3 deletions
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10
drivers/opp/debugfs.c
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@ -195,14 +195,18 @@ void opp_debug_register(struct opp_device *opp_dev, struct opp_table *opp_table)
static void opp_migrate_dentry(struct opp_device *opp_dev,
struct opp_table *opp_table)
{
struct opp_device *new_dev;
struct opp_device *new_dev = NULL, *iter;
const struct device *dev;
struct dentry *dentry;
/* Look for next opp-dev */
list_for_each_entry(new_dev, &opp_table->dev_list, node)
if (new_dev != opp_dev)
list_for_each_entry(iter, &opp_table->dev_list, node)
if (iter != opp_dev) {
new_dev = iter;
break;
}
BUG_ON(!new_dev);
/* new_dev is guaranteed to be valid here */
dev = new_dev->dev;