linux-kernel - Re: [PATCH 1/1] mmc: Fixed bug in IDMAC_SET_BUFFER1_SIZE Macro in dw

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Date:	Thu, 28 Jul 2011 12:17:54 +0100
From:	James Hogan <james.hogan@...tec.com>
To:	Shashidhar Hiremath <shashidharh@...avyalabs.com>
CC:	Will Newton <will.newton@...tec.com>,
	Kyungmin Park <kyungmin.park@...sung.com>,
	linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/1] mmc: Fixed bug in IDMAC_SET_BUFFER1_SIZE Macro in
 dw_mmc.c

On 07/28/2011 12:03 PM, Shashidhar Hiremath wrote:
> The mask used inside this macro was assuming Buffer_Size1's[BS1's] width to be 14 bits,
> it is actually of 13 bits, Modified masks used in IDMAC_SET_BUFFER1_SIZE such that
> they use only 13 bits instead of current 14.
> 
> Signed-off-by: Shashidhar Hiremath <shashidharh@...avyalabs.com>
> ---
>  drivers/mmc/host/dw_mmc.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
> 
> diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
> index 77f0b6b..f13bb49 100644
> --- a/drivers/mmc/host/dw_mmc.c
> +++ b/drivers/mmc/host/dw_mmc.c
> @@ -62,7 +62,7 @@ struct idmac_desc {
>  
>  	u32		des1;	/* Buffer sizes */
>  #define IDMAC_SET_BUFFER1_SIZE(d, s) \
> -	((d)->des1 = ((d)->des1 & 0x03ffc000) | ((s) & 0x3fff))
> +	((d)->des1 = ((d)->des1 & 0x03ffe000) | ((s) & 0x1fff))
>  
>  	u32		des2;	/* buffer 1 physical address */
>  

Yes, according to the TRM you appear to be correct

Reviewed-by: James Hogan <james.hogan@...tec.com>

Thanks
James

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