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mac80211: Fix bug in computing crc over dynamic IEs in beacon

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On a 32-bit machine, BIT() macro does not give the required
bit value if the bit is mroe than 31. In ieee802_11_parse_elems_crc(),
BIT() is suppossed to get the bit value more than 31 (42 (id of ERP_INFO_IE),
37 (CHANNEL_SWITCH_IE), (42), 32 (POWER_CONSTRAINT_IE), 45 (HT_CAP_IE),
61 (HT_INFO_IE)). As we do not get the required bit value for the above
IEs, crc over these IEs are never calculated, so any dynamic change in these
IEs after the association is not really handled on 32-bit platforms.
This patch fixes this issue.

Cc: stable@kernel.org
Signed-off-by: Vasanthakumar Thiagarajan <vasanth@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Vasanthakumar Thiagarajan 2009-12-04 17:41:34 +05:30 committed by John W. Linville
parent 02f7f17930
commit 1814077fd1
1 changed files with 1 additions and 1 deletions
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net/mac80211/util.c
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@ -579,7 +579,7 @@ u32 ieee802_11_parse_elems_crc(u8 *start, size_t len,
if (elen > left) if (elen > left)
break; break;
if (calc_crc && id < 64 && (filter & BIT(id))) if (calc_crc && id < 64 && (filter & (1ULL << id)))
crc = crc32_be(crc, pos - 2, elen + 2); crc = crc32_be(crc, pos - 2, elen + 2);
switch (id) { switch (id) {