linux-kernel - Re: [RFC PATCH 07/21] mmc: sdhci-pxav3: consolidate parsing path

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Date:	Wed, 27 Jan 2016 13:44:49 +0800
From:	Jisheng Zhang <jszhang@...vell.com>
To:	Shawn Lin <shawn.lin@...k-chips.com>
CC:	Ulf Hansson <ulf.hansson@...aro.org>,
	<bcm-kernel-feedback-list@...adcom.com>,
	<linux-rpi-kernel@...ts.infradead.org>,
	<linux-mmc@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	Gregory CLEMENT <gregory.clement@...e-electrons.com>
Subject: Re: [RFC PATCH 07/21] mmc: sdhci-pxav3: consolidate parsing path

Hi Shawn,

On Wed, 27 Jan 2016 13:07:36 +0800 Shawn Lin wrote:

> This patch remove mmc_of_parse and check return value
> of sdhci_get_of_property.
> 
> Cc: Jisheng Zhang <jszhang@...vell.com>
> Cc: Gregory CLEMENT <gregory.clement@...e-electrons.com>
> Signed-off-by: Shawn Lin <shawn.lin@...k-chips.com>

Reviewed-by: Jisheng Zhang <jszhang@...vell.com>


But I have some comments to your patch10:

> SDHCI_QUIRK_BROKEN_CARD_DETECTION is for "broken-cd".
> If we add MMC_CAP_NONREMOVABLE("non-removeble"), we shoud
> not add "broken-cd" together according to mmc.txt for
> dt-bingdings. Also, "broken-cd" can obtain from mmc_of_parse,
> which will add MMC_CAP_NEEDS_POLL into mmc->caps.

The problem is non-dt platforms which need the broken cd quirk don't have
chance to set MMC_CAP_NEEDS_POLL in driver, unless we explicitly do so
in driver. But then, the driver only need to do so on some platforms but
not always.

Thanks,
Jisheng


> ---
> 
>  drivers/mmc/host/sdhci-pxav3.c | 4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
> 
> diff --git a/drivers/mmc/host/sdhci-pxav3.c b/drivers/mmc/host/sdhci-pxav3.c
> index f5edf9d..06eda25 100644
> --- a/drivers/mmc/host/sdhci-pxav3.c
> +++ b/drivers/mmc/host/sdhci-pxav3.c
> @@ -410,10 +410,8 @@ static int sdhci_pxav3_probe(struct platform_device *pdev)
>  
>  	match = of_match_device(of_match_ptr(sdhci_pxav3_of_match), &pdev->dev);
>  	if (match) {
> -		ret = mmc_of_parse(host->mmc);
> -		if (ret)
> +		ret = sdhci_get_of_property(pdev);
>  			goto err_of_parse;
> -		sdhci_get_of_property(pdev);
>  		pdata = pxav3_get_mmc_pdata(dev);
>  		pdev->dev.platform_data = pdata;
>  	} else if (pdata) {