brcmfmac: Silence error messages about unsupported firmware features

KMSG is flooded with error messages about unsupported firmware
features of BCM4329 chip. The GET_ASSOCLIST error became especially
noisy with a newer NetworkManager version of Ubuntu 21.04. Turn the
noisy error messages into info messages and print them out only once.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20210511211549.30571-2-digetx@gmail.com

drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c

@@ -2895,8 +2895,13 @@ brcmf_cfg80211_dump_station(struct wiphy *wiphy, struct net_device *ndev,
 					     &cfg->assoclist,
 					     sizeof(cfg->assoclist));
 		if (err) {
-			bphy_err(drvr, "BRCMF_C_GET_ASSOCLIST unsupported, err=%d\n",
-				 err);
+			/* GET_ASSOCLIST unsupported by firmware of older chips */
+			if (err == -EBADE)
+				bphy_info_once(drvr, "BRCMF_C_GET_ASSOCLIST unsupported\n");
+			else
+				bphy_err(drvr, "BRCMF_C_GET_ASSOCLIST failed, err=%d\n",
+					 err);
+
 			cfg->assoclist.count = 0;
 			return -EOPNOTSUPP;
 		}
@@ -6851,7 +6856,12 @@ static int brcmf_setup_wiphybands(struct brcmf_cfg80211_info *cfg)
 
 	err = brcmf_fil_iovar_int_get(ifp, "rxchain", &rxchain);
 	if (err) {
-		bphy_err(drvr, "rxchain error (%d)\n", err);
+		/* rxchain unsupported by firmware of older chips */
+		if (err == -EBADE)
+			bphy_info_once(drvr, "rxchain unsupported\n");
+		else
+			bphy_err(drvr, "rxchain error (%d)\n", err);
+
 		nchain = 1;
 	} else {
 		for (nchain = 0; rxchain; nchain++)

drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c

@@ -188,9 +188,14 @@ static void _brcmf_set_multicast_list(struct work_struct *work)
 	/*Finally, pick up the PROMISC flag */
 	cmd_value = (ndev->flags & IFF_PROMISC) ? true : false;
 	err = brcmf_fil_cmd_int_set(ifp, BRCMF_C_SET_PROMISC, cmd_value);
-	if (err < 0)
-		bphy_err(drvr, "Setting BRCMF_C_SET_PROMISC failed, %d\n",
-			 err);
+	if (err < 0) {
+		/* PROMISC unsupported by firmware of older chips */
+		if (err == -EBADE)
+			bphy_info_once(drvr, "BRCMF_C_SET_PROMISC unsupported\n");
+		else
+			bphy_err(drvr, "Setting BRCMF_C_SET_PROMISC failed, err=%d\n",
+				 err);
+	}
 	brcmf_configure_arp_nd_offload(ifp, !cmd_value);
 }
 

drivers/net/wireless/broadcom/brcm80211/brcmfmac/debug.h

@@ -60,6 +60,10 @@ void __brcmf_err(struct brcmf_bus *bus, const char *func, const char *fmt, ...);
 				  ##__VA_ARGS__);			\
 	} while (0)
 
+#define bphy_info_once(drvr, fmt, ...)					\
+	wiphy_info_once((drvr)->wiphy, "%s: " fmt, __func__,		\
+			##__VA_ARGS__)
+
 #if defined(DEBUG) || defined(CONFIG_BRCM_TRACING)
 
 /* For debug/tracing purposes treat info messages as errors */