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Message-ID: <36d9bd32-7ea4-4d84-b1e9-3cfcc3bec85c@quicinc.com>
Date: Mon, 11 Sep 2023 12:09:30 -0700
From: Jeff Johnson <quic_jjohnson@...cinc.com>
To: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
Mukesh Ojha <quic_mojha@...cinc.com>, <corbet@....net>,
<agross@...nel.org>, <andersson@...nel.org>,
<konrad.dybcio@...aro.org>, <robh+dt@...nel.org>,
<krzysztof.kozlowski+dt@...aro.org>, <conor+dt@...nel.org>,
<keescook@...omium.org>, <tony.luck@...el.com>,
<gpiccoli@...lia.com>, <mathieu.poirier@...aro.org>,
<catalin.marinas@....com>, <will@...nel.org>,
<linus.walleij@...aro.org>, <andy.shevchenko@...il.com>,
<vigneshr@...com>, <nm@...com>, <matthias.bgg@...il.com>,
<kgene@...nel.org>, <alim.akhtar@...sung.com>,
<bmasney@...hat.com>, <quic_tsoni@...cinc.com>
CC: <linux-doc@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<linux-arm-msm@...r.kernel.org>, <linux-hardening@...r.kernel.org>,
<linux-remoteproc@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-gpio@...r.kernel.org>, <linux-mediatek@...ts.infradead.org>,
<linux-samsung-soc@...r.kernel.org>, <kernel@...cinc.com>
Subject: Re: [PATCH v5 06/17] soc: qcom: Add Qualcomm APSS minidump kernel
driver
On 9/11/2023 4:07 AM, Krzysztof Kozlowski wrote:
> On 09/09/2023 22:16, Mukesh Ojha wrote:
>> +/**
>> + * qcom_minidump_region_register() - Register region in APSS Minidump table.
>> + * @region: minidump region.
>> + *
>> + * Return: On success, it returns 0 and negative error value on failure.
>> + */
>> +int qcom_minidump_region_register(const struct qcom_minidump_region *region)
>> +{
>> + struct minidump *md;
>> + int ret;
>> +
>> + md = qcom_smem_minidump_ready();
>> + if (!md)
>> + return -EPROBE_DEFER;
>> +
>> + if (!qcom_minidump_valid_region(region))
>> + return -EINVAL;
>> +
>> + mutex_lock(&md->md_lock);
>> + ret = qcom_md_region_register(md, region);
>> + if (ret)
>> + goto unlock;
>> +
>> + qcom_md_update_elfheader(md, region);
>> +unlock:
>> + mutex_unlock(&md->md_lock);
>> + return ret;
>> +}
>> +EXPORT_SYMBOL_GPL(qcom_minidump_region_register);
>
> NAK, there is no user for this.
>
> Drop all exports from minidump drivers. Your upstream driver *must not*
> expose stuff to your vendor drivers.
Do we not expect that upstream drivers would want to register?
Mind you, in the downstream code the following was a bad limitation:
#define MAX_NUM_OF_SS 10
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