linux-kernel - Re: [PATCH] staging: rtl8723au: Fix sparse warning cast to restricted _

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Date:	Wed, 11 Mar 2015 14:23:29 -0400
From:	Jes Sorensen <Jes.Sorensen@...hat.com>
To:	Marcus Folkesson <marcus.folkesson@...il.com>
Cc:	Larry Finger <Larry.Finger@...inger.net>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-wireless@...r.kernel.org, devel@...verdev.osuosl.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] staging: rtl8723au: Fix sparse warning cast to restricted __le16

Marcus Folkesson <marcus.folkesson@...il.com> writes:
> This patch fixes the following sparse warnings:
>
>   CHECK   drivers/staging/rtl8723au/hal/rtl8723a_hal_init.c
>   drivers/staging/rtl8723au/hal/rtl8723a_hal_init.c:265:37: warning:
>   cast to restricted __le16
>   drivers/staging/rtl8723au/hal/rtl8723a_hal_init.c:267:39: warning:
>   cast to restricted __le16
>
> Signed-off-by: Marcus Folkesson <marcus.folkesson@...il.com>
> ---
>  drivers/staging/rtl8723au/include/rtl8723a_hal.h | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/staging/rtl8723au/include/rtl8723a_hal.h b/drivers/staging/rtl8723au/include/rtl8723a_hal.h
> index e146336..f642b11 100644
> --- a/drivers/staging/rtl8723au/include/rtl8723a_hal.h
> +++ b/drivers/staging/rtl8723au/include/rtl8723a_hal.h
> @@ -255,10 +255,10 @@ struct hal_data_8723a {
>  	struct hal_version		VersionID;
>  	enum rt_customer_id CustomerID;
>  
> -	u16	FirmwareVersion;
> -	u16	FirmwareVersionRev;
> -	u16	FirmwareSubVersion;
> -	u16	FirmwareSignature;
> +	__le16	FirmwareVersion;
> +	__le16	FirmwareVersionRev;
> +	__le16	FirmwareSubVersion;
> +	__le16	FirmwareSignature;

Ehm I am pretty sure it doesn't:

rtl8723au_hal_init.c:265
        pHalData->FirmwareVersion = le16_to_cpu(pFwHdr->Version);
	pHalData->FirmwareSubVersion = pFwHdr->Subversion;
	pHalData->FirmwareSignature = le16_to_cpu(pFwHdr->Signature);

If anything, the second assignment there should be changed to use
le16_to_cpu(), but your conversion is definitely wrong.

NACK

Jes
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