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Commit b85f3255 authored by Rajeev Kumar Sirasanagandla's avatar Rajeev Kumar Sirasanagandla
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ath: Disable non-20 mhz 2G world regulatory channels 



The minimum bandwidth supported is 5 MHZ. Kernel API
wiphy_apply_custom_regulatory can enable channels 12/13
with BW 5/10 even for reg rule 2402-2472. Circumvent the issue
by doing a check in the driver.

CRs-Fixed: 2136273
Change-Id: I296e45d142c38a83c90deb743e992eb1a7743feb
Signed-off-by: default avatarRajeev Kumar Sirasanagandla <rsirasan@codeaurora.org>
parent 9c23726a

drivers/net/wireless/ath/regd.c

+16 −0
Original line number Diff line number Diff line
@@ -631,6 +631,8 @@ ath_regd_init_wiphy(struct ath_regulatory *reg, 
					 struct regulatory_request *request))

{

	const struct ieee80211_regdomain *regd;

	u32 chan_num;

	struct ieee80211_channel *chan;



	wiphy->reg_notifier = reg_notifier;

	wiphy->regulatory_flags |= REGULATORY_STRICT_REG |
@@ -653,6 +655,20 @@ ath_regd_init_wiphy(struct ath_regulatory *reg, 
	}



	wiphy_apply_custom_regulatory(wiphy, regd);



	/* For regulatory rules similar to the following:

	 * REG_RULE(2412-10, 2462+10, 40, 0, 20, 0), channels 12/13 are enabled

	 * due to support of 5/10 MHz.

	 * Therefore, disable 2.4 Ghz channels that dont have 20 mhz bw

	 */

	for (chan_num = 0;

	     chan_num < wiphy->bands[IEEE80211_BAND_2GHZ]->n_channels;

	     chan_num++) {

		chan = &wiphy->bands[IEEE80211_BAND_2GHZ]->channels[chan_num];

		if (chan->flags & IEEE80211_CHAN_NO_20MHZ)

			chan->flags |= IEEE80211_CHAN_DISABLED;

	}



	ath_reg_apply_radar_flags(wiphy);

	ath_reg_apply_world_flags(wiphy, NL80211_REGDOM_SET_BY_DRIVER, reg);

	return 0;