On Thu, Aug 20, 2020 at 05:29:44PM +0200, Krzysztof Kozlowski wrote:
> On Tue, Aug 18, 2020 at 12:02:01PM +0100, Alex Dewar wrote:
> > In brcmstb_dpfe_download_firmware(), memory is allocated to variable fw by
> > firmware_request_nowarn(), but never released. Fix up to release fw on
> > all return paths.
> >
> > Signed-off-by: Alex Dewar <alex.dewa...@gmail.com>
> > ---
> > drivers/memory/brcmstb_dpfe.c | 18 +++++++++++-------
> > 1 file changed, 11 insertions(+), 7 deletions(-)
> >
> > diff --git a/drivers/memory/brcmstb_dpfe.c b/drivers/memory/brcmstb_dpfe.c
> > index 60e8633b1175..f24a9dc65f3c 100644
> > --- a/drivers/memory/brcmstb_dpfe.c
> > +++ b/drivers/memory/brcmstb_dpfe.c
> > @@ -616,7 +616,7 @@ static int brcmstb_dpfe_download_firmware(struct
> > brcmstb_dpfe_priv *priv)
> > const u32 *dmem, *imem;
> > struct init_data init;
> > const void *fw_blob;
> > - int ret;
> > + int ret = 0;
>
> This does not look needed. Why initializing it? You cannot jump to
> release_fw label or reach it without going through assignment.
>
> Best regards,
> Krzysztof
Good spot! I'll send a v2.
>
> >
> > /*
> > * Skip downloading the firmware if the DCPU is already running and
> > @@ -647,8 +647,10 @@ static int brcmstb_dpfe_download_firmware(struct
> > brcmstb_dpfe_priv *priv)
> > return (ret == -ENOENT) ? -EPROBE_DEFER : ret;
> >
> > ret = __verify_firmware(&init, fw);
> > - if (ret)
> > - return -EFAULT;
> > + if (ret) {
> > + ret = -EFAULT;
> > + goto release_fw;
> > + }
> >
> > __disable_dcpu(priv);
> >
> > @@ -667,18 +669,20 @@ static int brcmstb_dpfe_download_firmware(struct
> > brcmstb_dpfe_priv *priv)
> >
> > ret = __write_firmware(priv->dmem, dmem, dmem_size, is_big_endian);
> > if (ret)
> > - return ret;
> > + goto release_fw;
> > ret = __write_firmware(priv->imem, imem, imem_size, is_big_endian);
> > if (ret)
> > - return ret;
> > + goto release_fw;
> >
> > ret = __verify_fw_checksum(&init, priv, header, init.chksum);
> > if (ret)
> > - return ret;
> > + goto release_fw;
> >
> > __enable_dcpu(priv);
> >
> > - return 0;
> > +release_fw:
> > + release_firmware(fw);
> > + return ret;
> > }
> >
> > static ssize_t generic_show(unsigned int command, u32 response[],
> > --
> > 2.28.0
> >
