mt76_register_debugfs_fops() returns the dentry from debugfs_create_dir(), which yields an error pointer on failure (notably ERR_PTR(-ENODEV) when CONFIG_DEBUG_FS=n), never NULL. Per commit ff9fb72bc077 ("debugfs: return error values, not NULL"), callers do not need to check the return value. Drop the dead !dir checks in mt7615/mt7915/mt7921/mt7925/mt7996 _init_debugfs(). Converting them to IS_ERR() instead would have exposed a probe abort on CONFIG_DEBUG_FS=n, since each *_init_debugfs() caller propagates the helper's return value. This patch supersedes an earlier proposal that converted the checks to IS_ERR(). Link: https://lore.kernel.org/all/20260514193243.2518979-1-ingyujang25@korea.ac.kr Signed-off-by: Ingyu Jang --- drivers/net/wireless/mediatek/mt76/mt7615/debugfs.c | 2 -- drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c | 3 +-- drivers/net/wireless/mediatek/mt76/mt7921/debugfs.c | 2 -- drivers/net/wireless/mediatek/mt76/mt7925/debugfs.c | 2 -- drivers/net/wireless/mediatek/mt76/mt7996/debugfs.c | 2 -- 5 files changed, 1 insertion(+), 10 deletions(-) diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/debugfs.c b/drivers/net/wireless/mediatek/mt76/mt7615/debugfs.c index 0f7b20152279c..6a1475e3c8999 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7615/debugfs.c +++ b/drivers/net/wireless/mediatek/mt76/mt7615/debugfs.c @@ -550,8 +550,6 @@ int mt7615_init_debugfs(struct mt7615_dev *dev) struct dentry *dir; dir = mt76_register_debugfs_fops(&dev->mphy, &fops_regval); - if (!dir) - return -ENOMEM; if (is_mt7615(&dev->mt76)) debugfs_create_devm_seqfile(dev->mt76.dev, "xmit-queues", dir, diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c b/drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c index 26ed3745af43e..4d0854fe785bd 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c +++ b/drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c @@ -1296,8 +1296,7 @@ int mt7915_init_debugfs(struct mt7915_phy *phy) struct dentry *dir; dir = mt76_register_debugfs_fops(phy->mt76, NULL); - if (!dir) - return -ENOMEM; + debugfs_create_file("muru_debug", 0600, dir, dev, &fops_muru_debug); debugfs_create_file("muru_stats", 0400, dir, phy, &mt7915_muru_stats_fops); diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/debugfs.c b/drivers/net/wireless/mediatek/mt76/mt7921/debugfs.c index 4333005b3ad95..a5a70d8e8544a 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7921/debugfs.c +++ b/drivers/net/wireless/mediatek/mt76/mt7921/debugfs.c @@ -266,8 +266,6 @@ int mt7921_init_debugfs(struct mt792x_dev *dev) struct dentry *dir; dir = mt76_register_debugfs_fops(&dev->mphy, &fops_regval); - if (!dir) - return -ENOMEM; if (mt76_is_mmio(&dev->mt76)) debugfs_create_devm_seqfile(dev->mt76.dev, "xmit-queues", diff --git a/drivers/net/wireless/mediatek/mt76/mt7925/debugfs.c b/drivers/net/wireless/mediatek/mt76/mt7925/debugfs.c index e2498659c884e..d01ff49de47af 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7925/debugfs.c +++ b/drivers/net/wireless/mediatek/mt76/mt7925/debugfs.c @@ -291,8 +291,6 @@ int mt7925_init_debugfs(struct mt792x_dev *dev) struct dentry *dir; dir = mt76_register_debugfs_fops(&dev->mphy, &fops_regval); - if (!dir) - return -ENOMEM; if (mt76_is_mmio(&dev->mt76)) debugfs_create_devm_seqfile(dev->mt76.dev, "xmit-queues", diff --git a/drivers/net/wireless/mediatek/mt76/mt7996/debugfs.c b/drivers/net/wireless/mediatek/mt76/mt7996/debugfs.c index 76d623b2cafb4..327fc2032c8da 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7996/debugfs.c +++ b/drivers/net/wireless/mediatek/mt76/mt7996/debugfs.c @@ -856,8 +856,6 @@ int mt7996_init_debugfs(struct mt7996_dev *dev) struct dentry *dir; dir = mt76_register_debugfs_fops(&dev->mphy, NULL); - if (!dir) - return -ENOMEM; debugfs_create_file("hw-queues", 0400, dir, dev, &mt7996_hw_queues_fops); -- 2.34.1