[NET]: Fix HH_DATA_OFF.
When the hardware header size is a multiple of HH_DATA_MOD, HH_DATA_OFF() incorrectly returns HH_DATA_MOD (instead of 0). This affects ieee80211 layer as 802.11 header is 32 bytes long. Signed-off-by: Jiri Benc <jbenc@suse.cz> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -204,7 +204,7 @@ struct hh_cache
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/* cached hardware header; allow for machine alignment needs. */
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#define HH_DATA_MOD 16
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#define HH_DATA_OFF(__len) \
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(HH_DATA_MOD - ((__len) & (HH_DATA_MOD - 1)))
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(HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
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#define HH_DATA_ALIGN(__len) \
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(((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
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unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
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