linux-kernel - [PATCH v1 1/1] ASoC: SOF: probes: Check ops before memory allocation

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Message-Id: <20221117103223.74425-1-andriy.shevchenko@linux.intel.com>
Date:   Thu, 17 Nov 2022 12:32:23 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Mark Brown <broonie@...nel.org>,
        Peter Ujfalusi <peter.ujfalusi@...ux.intel.com>,
        Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        Ranjani Sridharan <ranjani.sridharan@...ux.intel.com>,
        Jyri Sarha <jyri.sarha@...el.com>,
        sound-open-firmware@...a-project.org, alsa-devel@...a-project.org,
        linux-kernel@...r.kernel.org
Cc:     Liam Girdwood <lgirdwood@...il.com>,
        Bard Liao <yung-chuan.liao@...ux.intel.com>,
        Kai Vehmanen <kai.vehmanen@...ux.intel.com>,
        Daniel Baluta <daniel.baluta@....com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: [PATCH v1 1/1] ASoC: SOF: probes: Check ops before memory allocation

We may check ops before spending resources on memory allocation.
While at it, utilize dev_get_platdata() helper.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 sound/soc/sof/sof-client-probes.c | 14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)

diff --git a/sound/soc/sof/sof-client-probes.c b/sound/soc/sof/sof-client-probes.c
index d08395182b1a..fff126808bc0 100644
--- a/sound/soc/sof/sof-client-probes.c
+++ b/sound/soc/sof/sof-client-probes.c
@@ -399,23 +399,21 @@ static int sof_probes_client_probe(struct auxiliary_device *auxdev,
 	if (!sof_probes_enabled)
 		return -ENXIO;
 
-	if (!dev->platform_data) {
+	ops = dev_get_platdata(dev);
+	if (!ops) {
 		dev_err(dev, "missing platform data\n");
 		return -ENODEV;
 	}
-
-	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
-	if (!priv)
-		return -ENOMEM;
-
-	ops = dev->platform_data;
-
 	if (!ops->startup || !ops->shutdown || !ops->set_params || !ops->trigger ||
 	    !ops->pointer) {
 		dev_err(dev, "missing platform callback(s)\n");
 		return -ENODEV;
 	}
 
+	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
 	priv->host_ops = ops;
 
 	switch (sof_client_get_ipc_type(cdev)) {
-- 
2.35.1