ath10k: fix rx_channel during hw reconfigure

commit 1ce8c1484e80010a6e4b9611c65668ff77556f45 upstream.

Upon firmware assert, restart work will be triggered so that mac80211
will reconfigure the driver. An issue is reported that after restart
work, survey dump data do not contain in-use (SURVEY_INFO_IN_USE) info
for operating channel. During reconfigure, since mac80211 already has
valid channel context for given radio, channel context iteration return
num_chanctx > 0. Hence rx_channel is always NULL. Fix this by assigning
channel context to rx_channel when driver restart is in progress.

Signed-off-by: Rajkumar Manoharan <rmanohar@qti.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c
index b12183856fc4f46f2632de95ef4218ba44e7f300..aaae4941a5dffbbd3d2793bd835dd3ddb9a37461 100644 (file)
--- a/drivers/net/wireless/ath/ath10k/mac.c
+++ b/drivers/net/wireless/ath/ath10k/mac.c
@@ -6437,7 +6437,13 @@ ath10k_mac_update_rx_channel(struct ath10k *ar,
                        def = &vifs[0].new_ctx->def;
 
                ar->rx_channel = def->chan;
-       } else if (ctx && ath10k_mac_num_chanctxs(ar) == 0) {
+       } else if ((ctx && ath10k_mac_num_chanctxs(ar) == 0) ||
+                  (ctx && (ar->state == ATH10K_STATE_RESTARTED))) {
+               /* During driver restart due to firmware assert, since mac80211
+                * already has valid channel context for given radio, channel
+                * context iteration return num_chanctx > 0. So fix rx_channel
+                * when restart is in progress.
+                */
                ar->rx_channel = ctx->def.chan;
        } else {
                ar->rx_channel = NULL;