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authorXiaomeng Tong <xiam0nd.tong@gmail.com>2022-03-31 10:30:18 +0200
committerViresh Kumar <viresh.kumar@linaro.org>2022-04-11 05:01:43 +0200
commitc14faabf5364c5b1be115bbc660310966ca7371f (patch)
tree96687f3970bc83c67e8373647dae21b80eb678d3 /drivers/opp/debugfs.c
parentopp: replace usage of found with dedicated list iterator variable (diff)
downloadlinux-c14faabf5364c5b1be115bbc660310966ca7371f.tar.xz
linux-c14faabf5364c5b1be115bbc660310966ca7371f.zip
opp: use list iterator only inside the loop
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>
Diffstat (limited to 'drivers/opp/debugfs.c')
-rw-r--r--drivers/opp/debugfs.c10
1 files changed, 7 insertions, 3 deletions
diff --git a/drivers/opp/debugfs.c b/drivers/opp/debugfs.c
index 3fcc1f97f2d1..1b6e5c55c3ed 100644
--- a/drivers/opp/debugfs.c
+++ b/drivers/opp/debugfs.c
@@ -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;