From: ygardi-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org
To: Paul Bolle <pebolle-IWqWACnzNjzz+pZb47iToQ@public.gmane.org>
Cc: Yaniv Gardi <ygardi-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>,
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<devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Subject: Re: [PATCH v2 4/4] scsi: ufs: probe and init of variant driver from the platform device
Date: Sun, 7 Jun 2015 15:22:18 -0000 [thread overview]
Message-ID: <9e35d6a7cdfd3d53510d41b0ff0a22fc.squirrel@www.codeaurora.org> (raw)
In-Reply-To: <1433426833.15728.15.camel@x220>
Thanks Paul for the review and comments.
please see inline.
> On Wed, 2015-06-03 at 12:37 +0300, Yaniv Gardi wrote:
>> --- a/drivers/scsi/ufs/ufs-qcom.c
>> +++ b/drivers/scsi/ufs/ufs-qcom.c
>
>> EXPORT_SYMBOL(ufs_hba_qcom_vops);
>
> Nothing uses this export. It's still a (static) symbol that is not
> included in any header. I think this export serves no purpose. Am I
> missing something subtle here?
>
you are correct. it will be removed.
>> +/**
>> + * ufs_qcom_probe - probe routine of the driver
>> + * @pdev: pointer to Platform device handle
>> + *
>> + * Always return 0
>> + */
>> +static int ufs_qcom_probe(struct platform_device *pdev)
>> +{
>> + dev_set_drvdata(&pdev->dev, (void *)&ufs_hba_qcom_vops);
>
> (Cast to void * should not be needed.)
>
when removing the cast there is compilation error:
ufs-qcom.c: warning: passing argument 2 of dev_set_drvdata discards
const qualifier from pointer target type
error, forbidden warning: ufs-qcom.c
>> + return 0;
>> +}
>> +
>> +/**
>> + * ufs_qcom_remove - set driver_data of the device to NULL
>> + * @pdev: pointer to platform device handle
>> + *
>> + * Always return 0
>> + */
>> +static int ufs_qcom_remove(struct platform_device *pdev)
>> +{
>> + dev_set_drvdata(&pdev->dev, NULL);
>> + return 0;
>> +}
>> +
>> +static const struct of_device_id ufs_qcom_of_match[] = {
>> + { .compatible = "qcom,ufs_variant"},
>> + {},
>> +};
>> +
>> +static struct platform_driver ufs_qcom_pltform = {
>> + .probe = ufs_qcom_probe,
>> + .remove = ufs_qcom_remove,
>> + .driver = {
>> + .name = "ufs_qcom",
>> + .owner = THIS_MODULE,
>> + .of_match_table = of_match_ptr(ufs_qcom_of_match),
>> + },
>> +};
>> +module_platform_driver(ufs_qcom_pltform);
>
>> --- a/drivers/scsi/ufs/ufshcd-pltfrm.c
>> +++ b/drivers/scsi/ufs/ufshcd-pltfrm.c
>
>> + struct device_node *node = pdev->dev.of_node;
>> + struct device_node *ufs_variant_node;
>> + struct platform_device *ufs_variant_pdev;
>
>> - hba->vops = get_variant_ops(&pdev->dev);
>> + err = of_platform_populate(node, NULL, NULL, &pdev->dev);
>> + if (err)
>> + dev_err(&pdev->dev,
>> + "%s: of_platform_populate() failed\n", __func__);
>> +
>> + ufs_variant_node = of_get_next_available_child(node, NULL);
>> +
>> + if (!ufs_variant_node) {
>> + dev_dbg(&pdev->dev, "failed to find ufs_variant_node child\n");
>> + } else {
>> + ufs_variant_pdev = of_find_device_by_node(ufs_variant_node);
>> +
>> + if (ufs_variant_pdev)
>> + hba->vops = (struct ufs_hba_variant_ops *)
>> + dev_get_drvdata(&ufs_variant_pdev->dev);
>
> (Another cast that I think is not needed.)
here you are right - this one can be removed and will be
>
>> + }
>
> If I scanned this correctly, the dev_set_drvdata() and dev_get_drvdata()
> pair adds an actual user of ufs_hba_qcom_vops. So that ends the obvious
> issue I think the code currently has. And I gladly defer to the scsi
> people to determine whether that is done the right way.
>
> Thanks,
>
>
> Paul Bolle
>
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next prev parent reply other threads:[~2015-06-07 15:22 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-03 9:37 [PATCH v2 0/4] fixing building errors and warnings when components Yaniv Gardi
2015-06-03 9:37 ` [PATCH v2 1/4] phy: qcom-ufs: fix build error when the component is built as a module Yaniv Gardi
2015-06-03 9:37 ` [PATCH v2 2/4] scsi: ufs-qcom: fix compilation warning if compiled " Yaniv Gardi
2015-06-03 9:37 ` [PATCH v2 3/4] scsi: ufs-qcom: update configuration option of SCSI_UFS_QCOM component Yaniv Gardi
2015-06-03 9:37 ` [PATCH v2 4/4] scsi: ufs: probe and init of variant driver from the platform device Yaniv Gardi
2015-06-04 14:07 ` Paul Bolle
2015-06-04 14:42 ` Paul Bolle
2015-06-04 20:42 ` ygardi
2015-06-07 15:22 ` ygardi-sgV2jX0FEOL9JmXXK+q4OQ [this message]
2015-06-04 14:32 ` Akinobu Mita
2015-06-04 20:53 ` ygardi
2015-06-05 16:47 ` Akinobu Mita
2015-06-07 15:32 ` ygardi
2015-06-08 14:47 ` Akinobu Mita
2015-06-08 15:02 ` Rob Herring
2015-06-09 5:53 ` Dov Levenglick
[not found] ` <bfade46f9d953e10240acb835105b81d.squirrel-mMfbam+mt9083fI46fginR2eb7JE58TQ@public.gmane.org>
2015-06-09 12:53 ` Rob Herring
2015-06-17 7:42 ` Dov Levenglick
2015-06-17 12:46 ` Rob Herring
2015-06-17 13:17 ` Dov Levenglick
2015-06-17 13:37 ` Rob Herring
2015-06-17 14:21 ` Dov Levenglick
2015-06-17 14:31 ` James Bottomley
2015-06-17 14:38 ` Dov Levenglick
[not found] ` <CAC5umyis6HU06KU-aSGoy6mCt-u+5Pz16nDk1qHrcsTnFo_2hA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-06-08 14:51 ` Rob Herring
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