From: Sean Young <sean@mess.org>
To: "Daniel W. S. Almeida" <dwlsalmeida@gmail.com>
Cc: mchehab@kernel.org, gregkh@linuxfoundation.org,
rfontana@redhat.com, kstewart@linuxfoundation.org,
tglx@linutronix.de, skhan@linuxfoundation.org,
linux-kernel-mentees@lists.linuxfoundation.org,
linux-media@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/6] media: dvb_dummy_fe: Add error messages in case of attach failure
Date: Tue, 31 Dec 2019 10:20:20 +0000 [thread overview]
Message-ID: <20191231102020.GG24469@gofer.mess.org> (raw)
In-Reply-To: <20191201161542.69535-3-dwlsalmeida@gmail.com>
On Sun, Dec 01, 2019 at 01:15:38PM -0300, Daniel W. S. Almeida wrote:
> From: "Daniel W. S. Almeida" <dwlsalmeida@gmail.com>
>
> Complain if the attach functions fail, for any reason. This is helpful
> when debugging.
>
> Suggested-by: Shuah Khan <skhan@linuxfoundation.org>
> Signed-off-by: Daniel W. S. Almeida <dwlsalmeida@gmail.com>
> ---
> drivers/media/dvb-frontends/dvb_dummy_fe.c | 18 +++++++++++++++---
> 1 file changed, 15 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/media/dvb-frontends/dvb_dummy_fe.c b/drivers/media/dvb-frontends/dvb_dummy_fe.c
> index 909dac2345c4..987c3488fe6c 100644
> --- a/drivers/media/dvb-frontends/dvb_dummy_fe.c
> +++ b/drivers/media/dvb-frontends/dvb_dummy_fe.c
> @@ -114,12 +114,16 @@ struct dvb_frontend* dvb_dummy_fe_ofdm_attach(void)
> /* allocate memory for the internal state */
> state = kzalloc(sizeof(struct dvb_dummy_fe_state), GFP_KERNEL);
> if (!state)
> - return NULL;
> + goto err;
>
> /* create dvb_frontend */
> memcpy(&state->frontend.ops, &dvb_dummy_fe_ofdm_ops, sizeof(struct dvb_frontend_ops));
> state->frontend.demodulator_priv = state;
> return &state->frontend;
> +
> +err:
> + pr_err("%s: DVB Dummy frontend driver attach failed\n", __func__);
> + return NULL;
No need to log anything after k[zm]alloc() failures.
Thanks
Sean
> }
> EXPORT_SYMBOL(dvb_dummy_fe_ofdm_attach);
>
> @@ -132,12 +136,16 @@ struct dvb_frontend *dvb_dummy_fe_qpsk_attach(void)
> /* allocate memory for the internal state */
> state = kzalloc(sizeof(struct dvb_dummy_fe_state), GFP_KERNEL);
> if (!state)
> - return NULL;
> + goto err;
>
> /* create dvb_frontend */
> memcpy(&state->frontend.ops, &dvb_dummy_fe_qpsk_ops, sizeof(struct dvb_frontend_ops));
> state->frontend.demodulator_priv = state;
> return &state->frontend;
> +
> +err:
> + pr_err("%s: DVB Dummy frontend driver attach failed\n", __func__);
> + return NULL;
> }
> EXPORT_SYMBOL(dvb_dummy_fe_qpsk_attach);
>
> @@ -150,12 +158,16 @@ struct dvb_frontend *dvb_dummy_fe_qam_attach(void)
> /* allocate memory for the internal state */
> state = kzalloc(sizeof(struct dvb_dummy_fe_state), GFP_KERNEL);
> if (!state)
> - return NULL;
> + goto err;
>
> /* create dvb_frontend */
> memcpy(&state->frontend.ops, &dvb_dummy_fe_qam_ops, sizeof(struct dvb_frontend_ops));
> state->frontend.demodulator_priv = state;
> return &state->frontend;
> +
> +err:
> + pr_err("%s: DVB Dummy frontend driver attach failed\n", __func__);
> + return NULL;
> }
> EXPORT_SYMBOL(dvb_dummy_fe_qam_attach);
>
> --
> 2.24.0
next prev parent reply other threads:[~2019-12-31 10:20 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-01 16:15 [PATCH 0/6] dummy_dvb_fe: Tidy up the dummy frontend Daniel W. S. Almeida
2019-12-01 16:15 ` [PATCH 1/6] media: dvb_dummy_fe: place EXPORT_SYMBOL below corresponding function Daniel W. S. Almeida
2019-12-01 16:15 ` [PATCH 2/6] media: dvb_dummy_fe: Add error messages in case of attach failure Daniel W. S. Almeida
2019-12-31 10:20 ` Sean Young [this message]
2019-12-01 16:15 ` [PATCH 3/6] media: dvb_dummy_fe: Fix ERROR: POINTER_LOCATION Daniel W. S. Almeida
2019-12-31 10:08 ` Sean Young
2019-12-31 18:14 ` Daniel W. S. Almeida
2019-12-31 18:34 ` Sean Young
2019-12-01 16:15 ` [PATCH 4/6] media: dvb_dummy_fe: Fix long lines Daniel W. S. Almeida
[not found] ` <CAFzckaFfmVYV_baqV9bHrnguXfOKs42DJ2VgA4C1y2Ey-+99xQ@mail.gmail.com>
2019-12-02 5:35 ` Mauro Carvalho Chehab
2019-12-01 16:15 ` [PATCH 5/6] media: dvb_dummy_fe: Add blank line after declaration Daniel W. S. Almeida
2019-12-01 16:15 ` [PATCH 6/6] media: dvb_dummy_frontend: remove 'extern' keyword from declaration Daniel W. S. Almeida
2019-12-31 10:12 ` Sean Young
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