On 03/11/2025 10:30, Ma Ke wrote:

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: 78876f71b3e9 ("media: pci: intel: ivsc: Add ACE submodule")

Fixes tag is incorrect.

Signed-off-by: Ma Ke make24@iscas.ac.cn

drivers/phy/tegra/xusb.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/phy/tegra/xusb.c b/drivers/phy/tegra/xusb.c index c89df95aa6ca..d89493d68699 100644 --- a/drivers/phy/tegra/xusb.c +++ b/drivers/phy/tegra/xusb.c @@ -171,16 +171,16 @@ int tegra_xusb_pad_init(struct tegra_xusb_pad *pad, err = dev_set_name(&pad->dev, "%s", pad->soc->name); if (err < 0)

• goto unregister;
  

• goto put_device;
  

No mention in the commit message why we call put_device() here, but this does appear to be correct.

err = device_add(&pad->dev); if (err < 0)

• goto unregister;
  

• goto put_device;
  

return 0; -unregister:

• device_unregister(&pad->dev);

+put_device:

• put_device(&pad->dev); return err; }