linux-kernel - Re: [PATCH 3/6] ASoC: amd: acp: Add generic PCI driver module for ACP device

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Date:   Thu, 13 Jan 2022 21:48:33 +0530
From:   Ajit Kumar Pandey <AjitKumar.Pandey@....com>
To:     Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        broonie@...nel.org, alsa-devel@...a-project.org
Cc:     Sunil-kumar.Dommati@....com,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        open list <linux-kernel@...r.kernel.org>,
        Basavaraj.Hiregoudar@....com, Takashi Iwai <tiwai@...e.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        V sujith kumar Reddy <vsujithkumar.reddy@....com>,
        Arnd Bergmann <arnd@...db.de>,
        Ranjani Sridharan <ranjani.sridharan@...ux.intel.com>,
        Vijendar.Mukunda@....com, Alexander.Deucher@....com,
        Daniel Baluta <daniel.baluta@....com>,
        Bard Liao <bard.liao@...el.com>
Subject: Re: [PATCH 3/6] ASoC: amd: acp: Add generic PCI driver module for ACP
 device



On 1/13/2022 8:57 PM, Pierre-Louis Bossart wrote:
> [CAUTION: External Email]
> 
>> +static int acp_pci_probe(struct pci_dev *pci, const struct pci_device_id *pci_id)
>> +{
>> +     struct platform_device_info pdevinfo;
>> +     struct device *dev = &pci->dev;
>> +     const struct resource *res_acp;
>> +     struct acp_chip_info *chip;
>> +     struct resource *res;
>> +     unsigned int flag, addr, num_res, i;
>> +     int ret;
>> +
>> +     flag = snd_amd_acp_find_config(pci);
>> +     if (flag != FLAG_AMD_LEGACY)
>> +             return -ENODEV;
>> +
>> +     chip = devm_kzalloc(&pci->dev, sizeof(*chip), GFP_KERNEL);
>> +     if (!chip)
>> +             return -ENOMEM;
>> +
>> +     if (pci_enable_device(pci)) {
>> +             dev_err(&pci->dev, "pci_enable_device failed\n");
>> +             return -ENODEV;
>> +     }
>> +
>> +     ret = pci_request_regions(pci, "AMD ACP3x audio");
>> +     if (ret < 0) {
>> +             dev_err(&pci->dev, "pci_request_regions failed\n");
>> +             return -ENOMEM;
>> +     }
>> +
>> +     pci_set_master(pci);
>> +
>> +     switch (pci->revision) {
>> +     case 0x01:
>> +             res_acp = acp3x_res;
>> +             num_res = ARRAY_SIZE(acp3x_res);
>> +             chip->name = "acp_asoc_renoir";
>> +             chip->acp_rev = ACP3X_DEV;
>> +             break;
>> +     default:
>> +             dev_err(dev, "Unsupported device revision:0x%x\n", pci->revision);
>> +             return -EINVAL;
>> +     }
>> +
>> +     dmic_dev = platform_device_register_data(dev, "dmic-codec", PLATFORM_DEVID_NONE, NULL, 0);
>> +     if (IS_ERR(dmic_dev)) {
>> +             dev_err(dev, "failed to create DMIC device\n");
>> +             return PTR_ERR(dmic_dev);
>> +     }
> 
> Past this point, any error handling needs to use
> platform_device_unregister(dmic_dev);
> ...
> 
>> +     addr = pci_resource_start(pci, 0);
>> +     chip->base = devm_ioremap(&pci->dev, addr, pci_resource_len(pci, 0));
>> +
>> +     res = devm_kzalloc(&pci->dev, sizeof(struct resource) * num_res, GFP_KERNEL);
>> +     if (!res)
>> +             return -ENOMEM;
> 
> ...which is missed here.
Thanks .. will fix this in v1 patch chain
> 
>> +
>> +     for (i = 0; i < num_res; i++, res_acp++) {
>> +             res[i].name = res_acp->name;
>> +             res[i].flags = res_acp->flags;
>> +             res[i].start = addr + res_acp->start;
>> +             res[i].end = addr + res_acp->end;
>> +             if (res_acp->flags == IORESOURCE_IRQ) {
>> +                     res[i].start = pci->irq;
>> +                     res[i].end = res[i].start;
>> +             }
>> +     }
>> +
>> +     memset(&pdevinfo, 0, sizeof(pdevinfo));
>> +
>> +     pdevinfo.name = chip->name;
>> +     pdevinfo.id = 0;
>> +     pdevinfo.parent = &pci->dev;
>> +     pdevinfo.num_res = num_res;
>> +     pdevinfo.res = &res[0];
>> +     pdevinfo.data = chip;
>> +     pdevinfo.size_data = sizeof(*chip);
>> +
>> +     pdev = platform_device_register_full(&pdevinfo);
>> +     if (IS_ERR(pdev)) {
>> +             dev_err(&pci->dev, "cannot register %s device\n", pdevinfo.name);
>> +             platform_device_unregister(dmic_dev);
>> +             ret = PTR_ERR(pdev);
>> +     }
>> +
>> +     return ret;
>> +};
>