linux-kernel - Re: [PATCH] staging: rtlwifi: Use proper enum for return in halmac_parse_psd_data

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Date:   Thu, 21 Feb 2019 08:22:10 +0100
From:   Nicholas Mc Guire <der.herr@...r.at>
To:     Nathan Chancellor <natechancellor@...il.com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Nicholas Mc Guire <hofrat@...dl.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] staging: rtlwifi: Use proper enum for return in
 halmac_parse_psd_data_88xx

On Wed, Feb 20, 2019 at 10:25:24PM -0700, Nathan Chancellor wrote:
> Clang warns:
> 
> drivers/staging/rtlwifi/halmac/halmac_88xx/halmac_func_88xx.c:2472:11:
> warning: implicit conversion from enumeration type 'enum
> halmac_cmd_process_status' to different enumeration type 'enum
> halmac_ret_status' [-Wenum-conversion]
>                         return HALMAC_CMD_PROCESS_ERROR;
>                         ~~~~~~ ^~~~~~~~~~~~~~~~~~~~~~~~
> 1 warning generated.
> 
yup - my bad I somehow managed to end up in halmac_cmd_process_status
rather than halmac_ret_status - HALMAC_RET_MALLOC_FAIL makes sense here.

interesting that gcc did not fuss at this.

thx!
hofrat

> Fix this by using the proper enum for allocation failures,
> HALMAC_RET_MALLOC_FAIL, which is used in the rest of this file.
> 
> Fixes: e4b08e16b7d9 ("staging: r8822be: check kzalloc return or bail")
> Link: https://github.com/ClangBuiltLinux/linux/issues/375
> Signed-off-by: Nathan Chancellor <natechancellor@...il.com>

Reviewed-by: Nicholas Mc Guire <hofrat@...dl.org>

> ---
>  drivers/staging/rtlwifi/halmac/halmac_88xx/halmac_func_88xx.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/staging/rtlwifi/halmac/halmac_88xx/halmac_func_88xx.c b/drivers/staging/rtlwifi/halmac/halmac_88xx/halmac_func_88xx.c
> index ec742da030db..ddbeff8224ab 100644
> --- a/drivers/staging/rtlwifi/halmac/halmac_88xx/halmac_func_88xx.c
> +++ b/drivers/staging/rtlwifi/halmac/halmac_88xx/halmac_func_88xx.c
> @@ -2469,7 +2469,7 @@ halmac_parse_psd_data_88xx(struct halmac_adapter *halmac_adapter, u8 *c2h_buf,
>  	if (!psd_set->data) {
>  		psd_set->data = kzalloc(psd_set->data_size, GFP_KERNEL);
>  		if (!psd_set->data)
> -			return HALMAC_CMD_PROCESS_ERROR;
> +			return HALMAC_RET_MALLOC_FAIL;
>  	}
>  
>  	if (segment_id == 0)
> -- 
> 2.21.0.rc1
>