5.4-stable review patch. If anyone has any objections, please let me know.
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From: Ma Ke make24@iscas.ac.cn
commit b2ea5f49580c0762d17d80d8083cb89bc3acf74f upstream.
If device_add() fails, do not use device_unregister() for error handling. device_unregister() consists two functions: device_del() and put_device(). device_unregister() should only be called after device_add() succeeded because device_del() undoes what device_add() does if successful. Change device_unregister() to put_device() call before returning from the function.
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: 53d2a715c240 ("phy: Add Tegra XUSB pad controller support") Signed-off-by: Ma Ke make24@iscas.ac.cn Acked-by: Thierry Reding treding@nvidia.com Link: https://lore.kernel.org/r/20250303072739.3874987-1-make24@iscas.ac.cn Signed-off-by: Vinod Koul vkoul@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/phy/tegra/xusb.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)
--- a/drivers/phy/tegra/xusb.c +++ b/drivers/phy/tegra/xusb.c @@ -526,16 +526,16 @@ static int tegra_xusb_port_init(struct t
err = dev_set_name(&port->dev, "%s-%u", name, index); if (err < 0) - goto unregister; + goto put_device;
err = device_add(&port->dev); if (err < 0) - goto unregister; + goto put_device;
return 0;
-unregister: - device_unregister(&port->dev); +put_device: + put_device(&port->dev); return err; }