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mac80211: Allow tsf increments via debugfs

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Reading and writing back the tsf value via tsf is too slow if one wants
to make small increments to this timer.  With this change you can use
the syntax "+=<some value>" or "-=<some value>" to add or substract a
value from the tsf counter.

Signed-off-by: Javier Cardona <javier@cozybit.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Javier Cardona 2012-03-31 11:31:31 -07:00 committed by John W. Linville
parent f483ad25c3
commit 9bdd3a6bf8
1 changed files with 12 additions and 0 deletions
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12
net/mac80211/debugfs_netdev.c
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@ -424,6 +424,7 @@ static ssize_t ieee80211_if_parse_tsf(
struct ieee80211_local *local = sdata->local;
unsigned long long tsf;
int ret;
int tsf_is_delta = 0;
if (strncmp(buf, "reset", 5) == 0) {
if (local->ops->reset_tsf) {
@ -431,9 +432,20 @@ static ssize_t ieee80211_if_parse_tsf(
wiphy_info(local->hw.wiphy, "debugfs reset TSF\n");
}
} else {
if (buflen > 10 && buf[1] == '=') {
if (buf[0] == '+')
tsf_is_delta = 1;
else if (buf[0] == '-')
tsf_is_delta = -1;
else
return -EINVAL;
buf += 2;
}
ret = kstrtoull(buf, 10, &tsf);
if (ret < 0)
return -EINVAL;
if (tsf_is_delta)
tsf = drv_get_tsf(local, sdata) + tsf_is_delta * tsf;
if (local->ops->set_tsf) {
drv_set_tsf(local, sdata, tsf);
wiphy_info(local->hw.wiphy,