linux-kernel - Re: [PATCH v4 3/7] firmware: arm_scmi: imx: Add i.MX95 LMM protocol

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Message-ID: <20250409033739.GB27988@nxa18884-linux>
Date: Wed, 9 Apr 2025 11:37:39 +0800
From: Peng Fan <peng.fan@....nxp.com>
To: Dan Carpenter <dan.carpenter@...aro.org>
Cc: Sudeep Holla <sudeep.holla@....com>,
	Cristian Marussi <cristian.marussi@....com>,
	Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>, Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, linux-kernel@...r.kernel.org,
	arm-scmi@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	imx@...ts.linux.dev, devicetree@...r.kernel.org,
	Peng Fan <peng.fan@....com>
Subject: Re: [PATCH v4 3/7] firmware: arm_scmi: imx: Add i.MX95 LMM protocol

On Tue, Apr 08, 2025 at 12:17:54PM +0300, Dan Carpenter wrote:
>On Tue, Apr 08, 2025 at 04:44:27PM +0800, Peng Fan (OSS) wrote:
>> +static int scmi_imx_lmm_protocol_attributes_get(const struct scmi_protocol_handle *ph,
>> +						struct scmi_imx_lmm_priv *priv)
>> +{
>> +	struct scmi_msg_imx_lmm_protocol_attributes *attr;
>> +	struct scmi_xfer *t;
>> +	int ret;
>> +
>> +	ret = ph->xops->xfer_get_init(ph, PROTOCOL_ATTRIBUTES, 0,
>> +				      sizeof(*attr), &t);
>> +	if (ret)
>> +		return ret;
>> +
>> +	attr = t->rx.buf;
>> +
>> +	ret = ph->xops->do_xfer(ph, t);
>> +	if (!ret) {
>> +		priv->nr_lmm = le32_get_bits(attr->attributes, SCMI_IMX_LMM_NR_LM_MASK);
>> +		if (priv->nr_lmm > SCMI_IMX_LMM_NR_MAX) {
>> +			dev_err(ph->dev, "i.MX LMM: %d:Exceed max supported Logical Machines\n",
>> +				priv->nr_lmm);
>> +			return -EINVAL;
>
>This needs to call ph->xops->xfer_put(ph, t) before returning.

Oops. Thanks for spotting this.

I will wait to see if any more comments.

Not sure Sudeep could help address this if no more comments, or need me to
send a new version.

Thanks,
Peng.

>
>> +		}
>> +		dev_info(ph->dev, "i.MX LMM: %d Logical Machines\n", priv->nr_lmm);
>> +	}
>> +
>> +	ph->xops->xfer_put(ph, t);
>> +
>> +	return ret;
>> +}
>
>regards,
>dan carpenter