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authorJavier Cardona <javier@cozybit.com>2012-03-31 11:31:31 -0700
committerJohn W. Linville <linville@tuxdriver.com>2012-04-10 15:20:30 -0400
commit9bdd3a6bf8513a0a9eda031d15b36e4677854243 (patch)
treee3692a379d0382ba761c1ef27c2a0cd254620acd /net/mac80211
parentf483ad25c397bc2b33542fe245ea99c22c8a750c (diff)
mac80211: Allow tsf increments via debugfs
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>
Diffstat (limited to 'net/mac80211')
-rw-r--r--net/mac80211/debugfs_netdev.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/net/mac80211/debugfs_netdev.c b/net/mac80211/debugfs_netdev.c
index 6ed0455902c6..b0fc205411c1 100644
--- a/net/mac80211/debugfs_netdev.c
+++ b/net/mac80211/debugfs_netdev.c
@@ -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,