Received-SPF: pass (google.com: domain of linux-bluetooth+bounces-4936-linux.lists.archive=gmail.com@vger.kernel.org designates 147.75.199.223 as permitted sender) client-ip=147.75.199.223;
Precedence: bulk
MIME-Version: 1.0
References: <692b4749f4267436363a5a8840140da8cd8858a1.1716190895.git.christophe.jaillet@wanadoo.fr>
In-Reply-To: <692b4749f4267436363a5a8840140da8cd8858a1.1716190895.git.christophe.jaillet@wanadoo.fr>
From: Luiz Augusto von Dentz <luiz.dentz@gmail.com>
Date: Fri, 24 May 2024 15:39:28 -0400
Message-ID: <CABBYNZLeM7MQrBuGE49KN9Xm1EQ-cFK3nR57sg2hWB0jOUFn7A@mail.gmail.com>
Subject: Re: [PATCH] Bluetooth: btintel_pcie: Fix the error handling path of btintel_pcie_probe()
To: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Cc: Marcel Holtmann <marcel@holtmann.org>, Tedd Ho-Jeong An <tedd.an@intel.com>, Kiran K <kiran.k@intel.com>, 
	linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org, 
	Luiz Augusto von Dentz <luiz.von.dentz@intel.com>, linux-bluetooth@vger.kernel.org
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

Hi Christophe,

On Mon, May 20, 2024 at 3:42=E2=80=AFAM Christophe JAILLET
<christophe.jaillet@wanadoo.fr> wrote:
>
> Some resources freed in the remove function are not handled by the error
> handling path of the probe.
>
> Add the needed function calls.
>
> Fixes: c2b636b3f788 ("Bluetooth: btintel_pcie: Add support for PCIe trans=
port")
> Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
> ---
> Compile tested only.
> Maybe incomplete.
> ---
>  drivers/bluetooth/btintel_pcie.c | 20 ++++++++++++++------
>  1 file changed, 14 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/bluetooth/btintel_pcie.c b/drivers/bluetooth/btintel=
_pcie.c
> index 5b6805d87fcf..d572576d0dbc 100644
> --- a/drivers/bluetooth/btintel_pcie.c
> +++ b/drivers/bluetooth/btintel_pcie.c
> @@ -1280,17 +1280,17 @@ static int btintel_pcie_probe(struct pci_dev *pde=
v,
>
>         err =3D btintel_pcie_config_pcie(pdev, data);
>         if (err)
> -               goto exit_error;
> +               goto exit_destroy_worqueue;
>
>         pci_set_drvdata(pdev, data);
>
>         err =3D btintel_pcie_alloc(data);
>         if (err)
> -               goto exit_error;
> +               goto exit_free_irq_vectors;
>
>         err =3D btintel_pcie_enable_bt(data);
>         if (err)
> -               goto exit_error;
> +               goto exit_free_pcie;
>
>         /* CNV information (CNVi and CNVr) is in CSR */
>         data->cnvi =3D btintel_pcie_rd_reg32(data, BTINTEL_PCIE_CSR_HW_RE=
V_REG);
> @@ -1299,17 +1299,25 @@ static int btintel_pcie_probe(struct pci_dev *pde=
v,
>
>         err =3D btintel_pcie_start_rx(data);
>         if (err)
> -               goto exit_error;
> +               goto exit_free_pcie;
>
>         err =3D btintel_pcie_setup_hdev(data);
>         if (err)
> -               goto exit_error;
> +               goto exit_free_pcie;
>
>         bt_dev_dbg(data->hdev, "cnvi: 0x%8.8x cnvr: 0x%8.8x", data->cnvi,
>                    data->cnvr);
>         return 0;
>
> -exit_error:
> +exit_free_pcie:
> +       btintel_pcie_free(data);
> +
> +exit_free_irq_vectors:
> +       pci_free_irq_vectors(pdev);
> +
> +exit_destroy_worqueue:
> +       destroy_workqueue(data->workqueue);
> +

This looks a bit messy, perhaps we should really be calling
btintel_pcie_remove instead and adapt it to check if a field has been
initialized or not then proceed to free/cleanup/etc.

>         /* reset device before exit */
>         btintel_pcie_reset_bt(data);
>
> --
> 2.45.1
>


--=20
Luiz Augusto von Dentz