linux-kernel - Re: [PATCH V4] MMC: PM: add suspend/resume in atmel-mci

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Date:	Wed, 6 Jul 2011 11:28:09 +0300
From:	Felipe Balbi <balbi@...com>
To:	Nicolas Ferre <nicolas.ferre@...el.com>
Cc:	cjb@...top.org, linux-mmc@...r.kernel.org,
	hans-christian.egtvedt@...el.com, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, kernel@...32linux.org,
	balbi@...com
Subject: Re: [PATCH V4] MMC: PM: add suspend/resume in atmel-mci

Hi,

On Wed, Jul 06, 2011 at 11:31:36AM +0200, Nicolas Ferre wrote:
> Take care of slots while going to suspend state.
> 
> Signed-off-by: Nicolas Ferre <nicolas.ferre@...el.com>

FWIW:

Reviewed-by: Felipe Balbi <balbi@...com>

> @@ -1878,10 +1879,72 @@ static int __exit atmci_remove(struct platform_device *pdev)
>  	return 0;
>  }
>  
> +#ifdef CONFIG_PM
> +static int atmci_suspend(struct device *dev)
> +{
> +	struct atmel_mci *host = dev_get_drvdata(dev);
> +	int i;
> +
> +	 for (i = 0; i < ATMEL_MCI_MAX_NR_SLOTS; i++) {
> +		struct atmel_mci_slot *slot = host->slot[i];
> +		int ret;
> +
> +		if (!slot)
> +			continue;
> +		ret = mmc_suspend_host(slot->mmc);
> +		if (ret < 0) {
> +			while (--i >= 0) {
> +				slot = host->slot[i];
> +				if (slot
> +				&& test_bit(ATMCI_SUSPENDED, &slot->flags)) {
> +					mmc_resume_host(host->slot[i]->mmc);
> +					clear_bit(ATMCI_SUSPENDED, &slot->flags);
> +				}
> +			}
> +			return ret;
> +		} else {
> +			set_bit(ATMCI_SUSPENDED, &slot->flags);
> +		}

just one small nitpicking which you can ignore if you like, but you
don't really need the else branch here. If you fall into if (ret < 0)
you will return early anyway, so you can save two lines and an
indentation level :-p

-- 
balbi

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