Re: [PATCH] mt7601u: phy: simplify zero check on val

[Lorenzo Bianconi]

> From: Colin Ian King <colin.k...@canonical.com>
> 
> Currently the zero check on val to break out of a loop
> is a little obscure.  Replace the val is zero and break check
> with a loop while value is non-zero.
> 
> Signed-off-by: Colin Ian King <colin.k...@canonical.com>
> ---
>  drivers/net/wireless/mediatek/mt7601u/phy.c | 4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
> 
> diff --git a/drivers/net/wireless/mediatek/mt7601u/phy.c 
> b/drivers/net/wireless/mediatek/mt7601u/phy.c
> index 06f5702ab4bd..4e0e473caae1 100644
> --- a/drivers/net/wireless/mediatek/mt7601u/phy.c
> +++ b/drivers/net/wireless/mediatek/mt7601u/phy.c
> @@ -213,9 +213,7 @@ int mt7601u_wait_bbp_ready(struct mt7601u_dev *dev)
>  
>       do {
>               val = mt7601u_bbp_rr(dev, MT_BBP_REG_VERSION);
> -             if (val && ~val)
> -                     break;

I think this is not correct since (not considering the cast) we should break
from the loop if val != 0 and val != 0xff, so the right approach I guess is:

diff --git a/drivers/net/wireless/mediatek/mt7601u/phy.c 
b/drivers/net/wireless/mediatek/mt7601u/phy.c
index 06f5702ab4bd..d863ab4a66c9 100644
--- a/drivers/net/wireless/mediatek/mt7601u/phy.c
+++ b/drivers/net/wireless/mediatek/mt7601u/phy.c
@@ -213,7 +213,7 @@ int mt7601u_wait_bbp_ready(struct mt7601u_dev *dev)
 
        do {
                val = mt7601u_bbp_rr(dev, MT_BBP_REG_VERSION);
-               if (val && ~val)
+               if (val && val != 0xff)
                        break;
        } while (--i);

> -     } while (--i);
> +     } while (val && --i);
>  
>       if (!i) {
>               dev_err(dev->dev, "Error: BBP is not ready\n");
> -- 
> 2.20.1
> 

signature.asc
Description: PGP signature