linux-kernel - Re: [PATCH] mmc_core: fix data timeout for SEND_EXT

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Date:	Wed, 11 Feb 2009 13:30:04 +0000
From:	Matt Fleming <matt@...sole-pimps.org>
To:	Adrian Hunter <ext-adrian.hunter@...ia.com>
Cc:	Pierre Ossman <drzeus-mmc@...eus.cx>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] mmc_core: fix data timeout for SEND_EXT_CSD

On Tue, Feb 10, 2009 at 05:40:59PM +0200, Adrian Hunter wrote:
> diff --git a/drivers/mmc/core/mmc_ops.c b/drivers/mmc/core/mmc_ops.c
> index 9c50e6f..418a270 100644
> --- a/drivers/mmc/core/mmc_ops.c
> +++ b/drivers/mmc/core/mmc_ops.c
> @@ -248,12 +248,16 @@ mmc_send_cxd_data(struct mmc_card *card, struct mmc_host *host,
>
> 	sg_init_one(&sg, data_buf, len);
>
> -	/*
> -	 * The spec states that CSR and CID accesses have a timeout
> -	 * of 64 clock cycles.
> -	 */
> -	data.timeout_ns = 0;
> -	data.timeout_clks = 64;
> +	if (!mmc_host_is_spi(card->host) && opcode == MMC_SEND_EXT_CSD)
> +		mmc_set_data_timeout(&data, card);
> +	else {
> +		/*
> +		 * The spec states that CSR and CID accesses have a timeout
> +		 * of 64 clock cycles (8 for SPI).
> +		 */
> +		data.timeout_ns = 0;
> +		data.timeout_clks = 64;
> +	}
>
> 	mmc_wait_for_req(host, &mrq);
>

Doh! You're right, I did inadvertently break this. Your fix looks good.
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