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sparc: fix error handling in scan_one_device()

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Once of_device_register() failed, we should call put_device() to
decrement reference count for cleanup. Or it could cause memory leak.
So fix this by calling put_device(), then the name can be freed in
kobject_cleanup().

Calling path: of_device_register() -> of_device_add() -> device_add().
As comment of device_add() says, 'if device_add() succeeds, you should
call device_del() when you want to get rid of it. If device_add() has
not succeeded, use only put_device() to drop the reference count'.

Found by code review.

Cc: stable@vger.kernel.org
Fixes: cf44bbc26c ("[SPARC]: Beginnings of generic of_device framework.")
Signed-off-by: Ma Ke <make24@iscas.ac.cn>
Reviewed-by: Andreas Larsson <andreas@gaisler.com>
Signed-off-by: Andreas Larsson <andreas@gaisler.com>
This commit is contained in:
Ma Ke
2025-09-20 20:53:12 +08:00
committed by Andreas Larsson
parent 936fb51275
commit 302c04110f
2 changed files with 2 additions and 0 deletions
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1
arch/sparc/kernel/of_device_32.c
View File

@@ -387,6 +387,7 @@ static struct platform_device * __init scan_one_device(struct device_node *dp,
if (of_device_register(op)) {
printk("%pOF: Could not register of device.\n", dp);
put_device(&op->dev);
kfree(op);
op = NULL;
}

1
arch/sparc/kernel/of_device_64.c
View File

@@ -677,6 +677,7 @@ static struct platform_device * __init scan_one_device(struct device_node *dp,
if (of_device_register(op)) {
printk("%pOF: Could not register of device.\n", dp);
put_device(&op->dev);
kfree(op);
op = NULL;
}