From b332af5398a3aa1a2fdd69bb6968a8f866cc39aa Mon Sep 17 00:00:00 2001 From: Jakob Koschel Date: Fri, 12 May 2023 13:36:10 +0200 Subject: [PATCH] w1: Replace usage of found with dedicated list iterator variable 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 Link: https://lore.kernel.org/r/20230509-w1-replace-usage-of-found-with-tmp-list-iterator-variable-v3-1-e07c9603fd9d@gmail.com Signed-off-by: Krzysztof Kozlowski --- drivers/w1/w1.c | 32 +++++++++++++++----------------- 1 file changed, 15 insertions(+), 17 deletions(-) diff --git a/drivers/w1/w1.c b/drivers/w1/w1.c index e16a60872226..5353cbd75126 100644 --- a/drivers/w1/w1.c +++ b/drivers/w1/w1.c @@ -821,49 +821,47 @@ int w1_slave_detach(struct w1_slave *sl) struct w1_master *w1_search_master_id(u32 id) { - struct w1_master *dev; - int found = 0; + struct w1_master *dev = NULL, *iter; mutex_lock(&w1_mlock); - list_for_each_entry(dev, &w1_masters, w1_master_entry) { - if (dev->id == id) { - found = 1; - atomic_inc(&dev->refcnt); + list_for_each_entry(iter, &w1_masters, w1_master_entry) { + if (iter->id == id) { + dev = iter; + atomic_inc(&iter->refcnt); break; } } mutex_unlock(&w1_mlock); - return (found)?dev:NULL; + return dev; } struct w1_slave *w1_search_slave(struct w1_reg_num *id) { struct w1_master *dev; - struct w1_slave *sl = NULL; - int found = 0; + struct w1_slave *sl = NULL, *iter; mutex_lock(&w1_mlock); list_for_each_entry(dev, &w1_masters, w1_master_entry) { mutex_lock(&dev->list_mutex); - list_for_each_entry(sl, &dev->slist, w1_slave_entry) { - if (sl->reg_num.family == id->family && - sl->reg_num.id == id->id && - sl->reg_num.crc == id->crc) { - found = 1; + list_for_each_entry(iter, &dev->slist, w1_slave_entry) { + if (iter->reg_num.family == id->family && + iter->reg_num.id == id->id && + iter->reg_num.crc == id->crc) { + sl = iter; atomic_inc(&dev->refcnt); - atomic_inc(&sl->refcnt); + atomic_inc(&iter->refcnt); break; } } mutex_unlock(&dev->list_mutex); - if (found) + if (sl) break; } mutex_unlock(&w1_mlock); - return (found)?sl:NULL; + return sl; } void w1_reconnect_slaves(struct w1_family *f, int attach)