Re: [PATCH 1/5] Staging: rtl8723bs: os_dep: Fix assignment in if condition

[Joe Perches]

On Sat, 2019-03-09 at 15:30 -0300, Guilherme Tadashi Maeoka wrote:
> Fix an assignment in if condition.
> 
> Signed-off-by: Guilherme Tadashi Maeoka <gui.mae...@gmail.com>
> ---
>  drivers/staging/rtl8723bs/os_dep/osdep_service.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/staging/rtl8723bs/os_dep/osdep_service.c 
> b/drivers/staging/rtl8723bs/os_dep/osdep_service.c
> index 73b87da15eb2..c7fdcc6bbae3 100644
> --- a/drivers/staging/rtl8723bs/os_dep/osdep_service.c
> +++ b/drivers/staging/rtl8723bs/os_dep/osdep_service.c
> @@ -162,7 +162,9 @@ static int retriveFromFile(char *path, u8 *buf, u32 sz)
>       struct file *fp;
>  
>       if (path && buf) {
> -             if (0 == (ret =openFile(&fp, path, O_RDONLY, 0))) {
> +             ret = openFile(&fp, path, O_RDONLY, 0);
> +
> +             if (ret == 0) {
>                       DBG_871X("%s openFile path:%s fp =%p\n", __func__, path 
> , fp);
>  
>                       oldfs = get_fs(); set_fs(KERNEL_DS);

More common kernel style would be to rewrite the function
(and to fix the typo of retrieve) to something like:  

static int retrieveFromFile(char *path, u8 *buf, u32 sz)
{
        int ret;
        mm_segment_t oldfs;
        struct file *fp;

        if (!path || !buf) {
                DBG_871X("%s NULL pointer\n", __func__);
                return -EINVAL;
        }

        ret = openFile(&fp, path, O_RDONLY, 0);
        if (ret) {
                DBG_871X("%s openFile path:%s Fail, ret:%d\n",
                         __func__, path, ret);
                return ret;
        }

        DBG_871X("%s openFile path:%s fp =%p\n", __func__, path , fp);

        oldfs = get_fs();
        set_fs(KERNEL_DS);
        ret = readFile(fp, buf, sz);
        set_fs(oldfs);
        closeFile(fp);

        DBG_871X("%s readFile, ret:%d\n", __func__, ret);

        return ret;
}


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