Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 9bdd3a6b authored by Javier Cardona's avatar Javier Cardona Committed by John W. Linville
Browse files

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: default avatarJavier Cardona <javier@cozybit.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent f483ad25

net/mac80211/debugfs_netdev.c

+12 −0
Original line number Diff line number Diff line
@@ -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,