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authorVasanthakumar Thiagarajan <vasanth@atheros.com>2009-12-04 07:11:34 -0500
committerJohn W. Linville <linville@tuxdriver.com>2009-12-07 16:51:24 -0500
commit1814077fd12a9cdf478c10076e9c42094e9d9250 (patch)
tree802c2703cfc1bb4230b52d0f56277e6a3df98ab8 /net
parent02f7f1793023bd8e5e277ad349f6f43f8c284fb0 (diff)
mac80211: Fix bug in computing crc over dynamic IEs in beacon
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>
Diffstat (limited to 'net')
-rw-r--r--net/mac80211/util.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index d09f78bb2442..78a6e924c7e1 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -579,7 +579,7 @@ u32 ieee802_11_parse_elems_crc(u8 *start, size_t len,
579 if (elen > left) 579 if (elen > left)
580 break; 580 break;
581 581
582 if (calc_crc && id < 64 && (filter & BIT(id))) 582 if (calc_crc && id < 64 && (filter & (1ULL << id)))
583 crc = crc32_be(crc, pos - 2, elen + 2); 583 crc = crc32_be(crc, pos - 2, elen + 2);
584 584
585 switch (id) { 585 switch (id) {