[PATCH v3 3/5] batman-adv: use BIT_ULL for NL80211_STA_INFO_* attribute types

[PATCH v3 3/5] batman-adv: use BIT_ULL for NL80211_STA_INFO_* attribute types

[Omer Efrat]

The BIT macro uses unsigned long which some architectures handle as 32 bit
and therefore might cause macro's shift to overflow when used on a value
equals or larger than 32 (NL80211_STA_INFO_RX_DURATION and afterwards).

Since 'filled' member in station_info changed to u64, BIT_ULL macro
should be used with all NL80211_STA_INFO_* attribute types instead of BIT
to prevent future possible bugs when one will use BIT macro for higher
attributes by mistake.

This commit cleans up all usages of BIT macro with the above field
in batman-adv by changing it to BIT_ULL instead.

Signed-off-by: Omer Efrat <omer.efrat-CtGflUZwD1xBDgjK7y7TUQ@public.gmane.org>
---
 net/batman-adv/bat_v_elp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/batman-adv/bat_v_elp.c b/net/batman-adv/bat_v_elp.c
index 71c20c1..71e6474 100644
--- a/net/batman-adv/bat_v_elp.c
+++ b/net/batman-adv/bat_v_elp.c
@@ -114,7 +114,7 @@ static u32 batadv_v_elp_get_throughput(struct batadv_hardif_neigh_node *neigh)
 		}
 		if (ret)
 			goto default_throughput;
-		if (!(sinfo.filled & BIT(NL80211_STA_INFO_EXPECTED_THROUGHPUT)))
+		if (!(sinfo.filled & BIT_ULL(NL80211_STA_INFO_EXPECTED_THROUGHPUT)))
 			goto default_throughput;
 
 		return sinfo.expected_throughput / 100;
-- 
2.7.4

Re: [PATCH v3 3/5] batman-adv: use BIT_ULL for NL80211_STA_INFO_* attribute types

[Sven Eckelmann]

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On Sonntag, 17. Juni 2018 12:06:54 CEST Omer Efrat wrote:
[...]
> --- a/net/batman-adv/bat_v_elp.c
> +++ b/net/batman-adv/bat_v_elp.c
> @@ -114,7 +114,7 @@ static u32 batadv_v_elp_get_throughput(struct batadv_hardif_neigh_node *neigh)
>  		}
>  		if (ret)
>  			goto default_throughput;
> -		if (!(sinfo.filled & BIT(NL80211_STA_INFO_EXPECTED_THROUGHPUT)))
> +		if (!(sinfo.filled & BIT_ULL(NL80211_STA_INFO_EXPECTED_THROUGHPUT)))
>  			goto default_throughput;
>  
>  		return sinfo.expected_throughput / 100;
> 

WARNING: line over 80 characters
#32: FILE: net/batman-adv/bat_v_elp.c:117:
+               if (!(sinfo.filled & BIT_ULL(NL80211_STA_INFO_EXPECTED_THROUGHPUT)))

total: 0 errors, 1 warnings, 0 checks, 8 lines checked


Kind regards,
	Sven

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