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wireless: restrict to 32 legacy rates

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Since the standards only define 12 legacy rates, 32 is certainly
a sane upper limit and we don't need to use u64 everywhere. Add
sanity checking that no more than 32 rates are registered and
change the variables to u32 throughout.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Johannes Berg
2009-01-21 15:13:48 +01:00
committed by John W. Linville
parent 369391db1a
commit 881d948c23
14 changed files with 35 additions and 29 deletions
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12
net/wireless/core.c
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@@ -273,10 +273,16 @@ int wiphy_register(struct wiphy *wiphy)
sband->band = band;
if (!sband->n_channels || !sband->n_bitrates) {
WARN_ON(1);
if (WARN_ON(!sband->n_channels || !sband->n_bitrates))
return -EINVAL;
/*
* Since we use a u32 for rate bitmaps in
* ieee80211_get_response_rate, we cannot
* have more than 32 legacy rates.
*/
if (WARN_ON(sband->n_bitrates > 32))
return -EINVAL;
}
for (i = 0; i < sband->n_channels; i++) {
sband->channels[i].orig_flags =