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From: "Daniel W. S. Almeida" <dwlsalmeida@gmail.com>
To: mchehab@kernel.org, gregkh@linuxfoundation.org,
	rfontana@redhat.com, kstewart@linuxfoundation.org,
	tglx@linutronix.de
Cc: linux-kernel@vger.kernel.org, linux-media@vger.kernel.org,
	linux-kernel-mentees@lists.linuxfoundation.org,
	"Daniel W. S. Almeida" <dwlsalmeida@gmail.com>
Subject: [Linux-kernel-mentees] [PATCH] media: dvb_dummy_fe: Add error messages in case of attach failure
Date: Wed,  6 Nov 2019 22:37:45 -0300	[thread overview]
Message-ID: <20191107013745.22147-1-dwlsalmeida@gmail.com> (raw)

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 4db679cb70ad..ca86857c3667 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;
 }
 
 static const struct dvb_frontend_ops dvb_dummy_fe_qpsk_ops;
@@ -131,12 +135,16 @@ 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;
 }
 
 static const struct dvb_frontend_ops dvb_dummy_fe_qam_ops;
@@ -148,12 +156,16 @@ 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;
 }
 
 static const struct dvb_frontend_ops dvb_dummy_fe_ofdm_ops = {
-- 
2.24.0

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             reply	other threads:[~2019-11-07  1:45 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-07  1:37 Daniel W. S. Almeida [this message]
2019-11-30  6:54 ` [Linux-kernel-mentees] [PATCH] media: dvb_dummy_fe: Add error messages in case of attach failure Mauro Carvalho Chehab
2019-12-31  9:47   ` Sean Young

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