staging: wfx: fix handling of frames without RSSI data

It seems that in the old days, the RSSI information could be missing. In
this case, in order to not pollute the RSSI stats, the frame was
dropped (!).

It is far better to mark the frame with the flag RX_FLAG_NO_SIGNAL_VAL.

In add, the problem seems now fixed in the firmware (at least, it has
not been encountered with recent firmwares).

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20200701150707.222985-10-Jerome.Pouiller@silabs.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/wfx/data_rx.c b/drivers/staging/wfx/data_rx.c
index 0e959ebc38b565471069ea688c82efc050badcce..316c2f1537fe5ebabb362d333c90bc10df5e2d75 100644 (file)
--- a/drivers/staging/wfx/data_rx.c
+++ b/drivers/staging/wfx/data_rx.c
@@ -73,12 +73,6 @@ void wfx_rx_cb(struct wfx_vif *wvif,
 
        memset(hdr, 0, sizeof(*hdr));
 
-       // FIXME: Why do we drop these frames?
-       if (!arg->rcpi_rssi &&
-           (ieee80211_is_probe_resp(frame->frame_control) ||
-            ieee80211_is_beacon(frame->frame_control)))
-               goto drop;
-
        if (arg->status == HIF_STATUS_RX_FAIL_MIC)
                hdr->flag |= RX_FLAG_MMIC_ERROR;
        else if (arg->status)
@@ -102,6 +96,10 @@ void wfx_rx_cb(struct wfx_vif *wvif,
                hdr->rate_idx = arg->rxed_rate;
        }
 
+       if (!arg->rcpi_rssi) {
+               hdr->flag |= RX_FLAG_NO_SIGNAL_VAL;
+               dev_info(wvif->wdev->dev, "received frame without RSSI data\n");
+       }
        hdr->signal = arg->rcpi_rssi / 2 - 110;
        hdr->antenna = 0;