This is a note to let you know that I've just added the patch titled
wifi: brcmfmac: support CQM RSSI notification with older firmware
to the 6.2-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
wifi-brcmfmac-support-cqm-rssi-notification-with-old.patch
and it can be found in the queue-6.2 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit d38559870bb03c6615f388b2e4603607e2f4d833
Author: John Keeping <john@xxxxxxxxxxxx>
Date: Tue Jan 24 10:42:48 2023 +0000
wifi: brcmfmac: support CQM RSSI notification with older firmware
[ Upstream commit ec52d77d077529f198fd874c550a26b9cc86a331 ]
Using the BCM4339 firmware from linux-firmware (version "BCM4339/2 wl0:
Sep 5 2019 11:05:52 version 6.37.39.113 (r722271 CY)" from
cypress/cyfmac4339-sdio.bin) the RSSI respose is only 4 bytes, which
results in an error being logged.
It seems that older devices send only the RSSI field and neither SNR nor
noise is included. Handle this by accepting a 4 byte message and
reading only the RSSI from it.
Fixes: 7dd56ea45a66 ("brcmfmac: add support for CQM RSSI notifications")
Signed-off-by: John Keeping <john@xxxxxxxxxxxx>
Signed-off-by: Kalle Valo <kvalo@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20230124104248.2917465-1-john@xxxxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
index b8c99bfce963a..d17bb22422f48 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
@@ -6494,18 +6494,20 @@ static s32 brcmf_notify_rssi(struct brcmf_if *ifp,
{
struct brcmf_cfg80211_vif *vif = ifp->vif;
struct brcmf_rssi_be *info = data;
- s32 rssi, snr, noise;
+ s32 rssi, snr = 0, noise = 0;
s32 low, high, last;
- if (e->datalen < sizeof(*info)) {
+ if (e->datalen >= sizeof(*info)) {
+ rssi = be32_to_cpu(info->rssi);
+ snr = be32_to_cpu(info->snr);
+ noise = be32_to_cpu(info->noise);
+ } else if (e->datalen >= sizeof(rssi)) {
+ rssi = be32_to_cpu(*(__be32 *)data);
+ } else {
brcmf_err("insufficient RSSI event data\n");
return 0;
}
- rssi = be32_to_cpu(info->rssi);
- snr = be32_to_cpu(info->snr);
- noise = be32_to_cpu(info->noise);
-
low = vif->cqm_rssi_low;
high = vif->cqm_rssi_high;
last = vif->cqm_rssi_last;
