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| author | Johannes Berg <johannes@sipsolutions.net> | 2008-10-29 20:00:45 +0100 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2008-11-10 15:17:35 -0500 |
| commit | bd815252720e4b667d9946d050d003ec89bda099 (patch) | |
| tree | d7bb98f512c8b48031f9df01745820b7d6dfb3ac /net | |
| parent | 743b97caf98036ec8ee4bfc6fc6f85ad94e04783 (diff) | |
| download | linux-bd815252720e4b667d9946d050d003ec89bda099.tar.gz linux-bd815252720e4b667d9946d050d003ec89bda099.tar.bz2 linux-bd815252720e4b667d9946d050d003ec89bda099.zip | |
wireless: implement basic rate helper function
This adds a helper function that, given a bitmap of basic
rates and a bitrate returns the response rate for this rate.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net')
| -rw-r--r-- | net/wireless/util.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/net/wireless/util.c b/net/wireless/util.c index f54424693a38..e76cc28b0345 100644 --- a/net/wireless/util.c +++ b/net/wireless/util.c @@ -7,6 +7,25 @@ #include <asm/bitops.h> #include "core.h" +struct ieee80211_rate * +ieee80211_get_response_rate(struct ieee80211_supported_band *sband, + u64 basic_rates, int bitrate) +{ + struct ieee80211_rate *result = &sband->bitrates[0]; + int i; + + for (i = 0; i < sband->n_bitrates; i++) { + if (!(basic_rates & BIT(i))) + continue; + if (sband->bitrates[i].bitrate > bitrate) + continue; + result = &sband->bitrates[i]; + } + + return result; +} +EXPORT_SYMBOL(ieee80211_get_response_rate); + int ieee80211_channel_to_frequency(int chan) { if (chan < 14) |