From 49540d1b8155b5ded98e6b77c5c92b11854c3de7 Mon Sep 17 00:00:00 2001 From: Eliad Peller Date: Tue, 17 Sep 2013 18:41:27 +0300 Subject: [PATCH] wlcore: clarify and fix regulatory domain bit translation Channels 52-64 were mapped incorrectly. Refactor and document wlcore_get_reg_conf_ch_idx() in order to make it clear what's going on there. While on it, fix the return value check to consider 0 as a valid return value as well (indicates channel 1). Reported-by: Yaniv Machani Signed-off-by: Eliad Peller Signed-off-by: Ido Reis Signed-off-by: Victor Goldenshtein Signed-off-by: Luciano Coelho --- drivers/net/wireless/ti/wlcore/cmd.c | 52 +++++++++++++++++++++--------------- 1 file changed, 31 insertions(+), 21 deletions(-) diff --git a/drivers/net/wireless/ti/wlcore/cmd.c b/drivers/net/wireless/ti/wlcore/cmd.c index e3ae425..9e5416f8 100644 --- a/drivers/net/wireless/ti/wlcore/cmd.c +++ b/drivers/net/wireless/ti/wlcore/cmd.c @@ -1607,33 +1607,43 @@ out: static int wlcore_get_reg_conf_ch_idx(enum ieee80211_band band, u16 ch) { - int idx = -1; - + /* + * map the given band/channel to the respective predefined + * bit expected by the fw + */ switch (band) { - case IEEE80211_BAND_5GHZ: - if (ch >= 8 && ch <= 16) - idx = ((ch-8)/4 + 18); - else if (ch >= 34 && ch <= 64) - idx = ((ch-34)/2 + 3 + 18); - else if (ch >= 100 && ch <= 140) - idx = ((ch-100)/4 + 15 + 18); - else if (ch >= 149 && ch <= 165) - idx = ((ch-149)/4 + 26 + 18); - else - idx = -1; - break; case IEEE80211_BAND_2GHZ: + /* channels 1..14 are mapped to 0..13 */ if (ch >= 1 && ch <= 14) - idx = ch - 1; - else - idx = -1; + return ch - 1; + break; + case IEEE80211_BAND_5GHZ: + switch (ch) { + case 8 ... 16: + /* channels 8,12,16 are mapped to 18,19,20 */ + return 18 + (ch-8)/4; + case 34 ... 48: + /* channels 34,36..48 are mapped to 21..28 */ + return 21 + (ch-34)/2; + case 52 ... 64: + /* channels 52,56..64 are mapped to 29..32 */ + return 29 + (ch-52)/4; + case 100 ... 140: + /* channels 100,104..140 are mapped to 33..43 */ + return 33 + (ch-100)/4; + case 149 ... 165: + /* channels 149,153..165 are mapped to 44..48 */ + return 44 + (ch-149)/4; + default: + break; + } break; default: - wl1271_error("get reg conf ch idx - unknown band: %d", - (int)band); + break; } - return idx; + wl1271_error("%s: unknown band/channel: %d/%d", __func__, band, ch); + return -1; } void wlcore_set_pending_regdomain_ch(struct wl1271 *wl, u16 channel, @@ -1646,7 +1656,7 @@ void wlcore_set_pending_regdomain_ch(struct wl1271 *wl, u16 channel, ch_bit_idx = wlcore_get_reg_conf_ch_idx(band, channel); - if (ch_bit_idx > 0 && ch_bit_idx <= WL1271_MAX_CHANNELS) + if (ch_bit_idx >= 0 && ch_bit_idx <= WL1271_MAX_CHANNELS) set_bit(ch_bit_idx, (long *)wl->reg_ch_conf_pending); } -- 2.7.4