[PATCH 1/4] ARM: locomo: use put_device() on device_register() failure
From: Tarun Sahu <hidden>
Date: 2026-08-10 16:34:53
Also in:
driver-core, linux-arm-kernel, linux-edac, lkml
Subsystem:
arm port, the rest · Maintainers:
Russell King, Linus Torvalds
When device_register() fails, calling kfree(dev) directly bypasses the device_release() callback (locomo_dev_release) and leaks internal driver core structures allocated during device initialization. Fix this by replacing direct kfree(dev) with put_device(&dev->dev) when device_register() returns an error, ensuring proper refcount decrement and cleanup via locomo_dev_release(). Signed-off-by: Tarun Sahu <redacted> --- arch/arm/common/locomo.c | 13 ++++++------- 1 file changed, 6 insertions(+), 7 deletions(-)
diff --git a/arch/arm/common/locomo.c b/arch/arm/common/locomo.c
index 55e360452828..0f6689d343b0 100644
--- a/arch/arm/common/locomo.c
+++ b/arch/arm/common/locomo.c@@ -223,10 +223,8 @@ locomo_init_one_child(struct locomo *lchip, struct locomo_dev_info *info) int ret; dev = kzalloc_obj(struct locomo_dev); - if (!dev) { - ret = -ENOMEM; - goto out; - } + if (!dev) + return -ENOMEM; /* * If the parent device has a DMA mask associated with it,
@@ -255,10 +253,11 @@ locomo_init_one_child(struct locomo *lchip, struct locomo_dev_info *info) ret = device_register(&dev->dev); if (ret) { - out: - kfree(dev); + put_device(&dev->dev); + return ret; } - return ret; + + return 0; } #ifdef CONFIG_PM
--
2.55.0.679.g6767b8d81c-goog