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Re: [PATCH 3/8] ath5k: Use common ath key management functions

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On Wed, Sep 08, 2010 at 04:04:43PM +0900, Bruno Randolf wrote:
> Use common ath key management functions in ath5k. This fixes problems with HW
> encryption in AP mode, which was broken in the ath5k implementation.

We went from this:

> -		key->flags |= (IEEE80211_KEY_FLAG_GENERATE_IV |
> -			       IEEE80211_KEY_FLAG_GENERATE_MMIC);

to:

> +			/* push IV and Michael MIC generation to stack */
> +			key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
> +			if (key->cipher == WLAN_CIPHER_SUITE_TKIP)
> +				key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;

There's no need to special case the flags based on whether the
cipher is TKIP; mac80211 does this already.

> +			if (key->cipher == WLAN_CIPHER_SUITE_CCMP)
> +				key->flags |= IEEE80211_KEY_FLAG_SW_MGMT;

Ditto, this already only affects CCMP in mac80211 (btw, why can't we do
management frames in hardware?) so it can be more simply written as:

key->flags |= (IEEE80211_KEY_FLAG_GENERATE_IV |
               IEEE80211_KEY_FLAG_GENERATE_MMIC |
               IEEE80211_KEY_FLAG_SW_MGMT);

-- 
Bob Copeland %% www.bobcopeland.com

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