[PATCH wireless-next] wifi: cfg80211: init S1G properly when creating chandef

[Lachlan Hodges <lachlan.hodges@morsemicro.com>]

When emulating channel contexts, the first chandef passed to the
driver when starting an interface is the local->dflt_chandef
via ieee80211_calc_hw_conf_chan(). This means that currently an
S1G driver will be given a chandef with a width of 20MHz. This will
lead to either the driver or firmware rejecting this configuration
and a non-zero ret code - leading to a WARN within
ieee80211_hw_conf_init().

In the case of emulation, ensure we initialise with a width of
1MHz for S1G channels such that the default chandef is valid.

Signed-off-by: Lachlan Hodges <lachlan.hodges@morsemicro.com>
---
 net/wireless/chan.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/net/wireless/chan.c b/net/wireless/chan.c
index 68221b1ab45e..c0c0151fe55f 100644
--- a/net/wireless/chan.c
+++ b/net/wireless/chan.c
@@ -32,6 +32,12 @@ void cfg80211_chandef_create(struct cfg80211_chan_def *chandef,
 		.freq1_offset = chan->freq_offset,
 	};
 
+	if (cfg80211_chandef_is_s1g(chandef)) {
+		chandef->width = NL80211_CHAN_WIDTH_1;
+		chandef->center_freq1 = chan->center_freq;
+		return;
+	}
+
 	switch (chan_type) {
 	case NL80211_CHAN_NO_HT:
 		chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
-- 
2.43.0