linux-kernel - Re: [PATCH v2 4/4] scsi: ufs: probe and init of variant driver from the platform device

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAC5umyis6HU06KU-aSGoy6mCt-u+5Pz16nDk1qHrcsTnFo_2hA@mail.gmail.com>
Date:	Thu, 4 Jun 2015 23:32:16 +0900
From:	Akinobu Mita <akinobu.mita@...il.com>
To:	Yaniv Gardi <ygardi@...eaurora.org>
Cc:	Jej B <James.Bottomley@...senpartnership.com>,
	LKML <linux-kernel@...r.kernel.org>,
	"linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
	linux-arm-msm@...r.kernel.org, Santosh Y <santoshsy@...il.com>,
	linux-scsi-owner@...r.kernel.org,
	Subhash Jadavani <subhashj@...eaurora.org>,
	Paul Bolle <pebolle@...cali.nl>,
	Gilad Broner <gbroner@...eaurora.org>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Vinayak Holikatti <vinholikatti@...il.com>,
	"James E.J. Bottomley" <JBottomley@...n.com>,
	Dolev Raviv <draviv@...eaurora.org>,
	Christoph Hellwig <hch@....de>,
	Sujit Reddy Thumma <sthumma@...eaurora.org>,
	Raviv Shvili <rshvili@...eaurora.org>,
	Sahitya Tummala <stummala@...eaurora.org>,
	"open list:OPEN FIRMWARE AND..." <devicetree@...r.kernel.org>
Subject: Re: [PATCH v2 4/4] scsi: ufs: probe and init of variant driver from
 the platform device

Hi Yaniv,

2015-06-03 18:37 GMT+09:00 Yaniv Gardi <ygardi@...eaurora.org>:
> @@ -321,7 +313,22 @@ static int ufshcd_pltfrm_probe(struct platform_device *pdev)
>                 goto out;
>         }
>
> -       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);
> +       }

I have no strong objection to 'ufs_variant' sub-node.  But why can't we
simply add an of_device_id to ufs_of_match, like below:

static const struct of_device_id ufs_of_match[] = {
        { .compatible = "jedec,ufs-1.1"},
#if IS_ENABLED(SCSI_UFS_QCOM)
        { .compatible = "qcom,ufs", .data = &ufs_hba_qcom_vops },
#neidf
        {},
};

and get hba->vops by get_variant_ops()?

There is something similar in
drivers/net/ethernet/freescale/fsl_pq_mdio.c
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/