netdev - [PATCH net-next 2/8] bnxt_en: Fix invoking hwmon_notify

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Date: Fri, 20 Oct 2023 14:27:51 -0700
From: Michael Chan <michael.chan@...adcom.com>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org,
	edumazet@...gle.com,
	kuba@...nel.org,
	pabeni@...hat.com,
	gospo@...adcom.com,
	kalesh-anakkur.purayil@...adcom.com,
	Guenter Roeck <linux@...ck-us.net>,
	Kashyap Desai <kashyap.desai@...adcom.com>,
	Somnath Kotur <somnath.kotur@...adcom.com>
Subject: [PATCH net-next 2/8] bnxt_en: Fix invoking hwmon_notify_event

From: Kalesh AP <kalesh-anakkur.purayil@...adcom.com>

FW sends the async event to the driver when the device temperature goes
above or below the threshold values.  Only notify hwmon if the
temperature is increasing to the next alert level, not when it is
decreasing.

Cc: Guenter Roeck <linux@...ck-us.net>
Reviewed-by: Kashyap Desai <kashyap.desai@...adcom.com>
Reviewed-by: Somnath Kotur <somnath.kotur@...adcom.com>
Signed-off-by: Kalesh AP <kalesh-anakkur.purayil@...adcom.com>
Signed-off-by: Michael Chan <michael.chan@...adcom.com>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c | 16 +++++++++++-----
 1 file changed, 11 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 7837e22f237b..65092150d451 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -2166,6 +2166,7 @@ static bool bnxt_event_error_report(struct bnxt *bp, u32 data1, u32 data2)
 	case ASYNC_EVENT_CMPL_ERROR_REPORT_BASE_EVENT_DATA1_ERROR_TYPE_THERMAL_THRESHOLD: {
 		u32 type = EVENT_DATA1_THERMAL_THRESHOLD_TYPE(data1);
 		char *threshold_type;
+		bool notify = false;
 		char *dir_str;
 
 		switch (type) {
@@ -2185,18 +2186,23 @@ static bool bnxt_event_error_report(struct bnxt *bp, u32 data1, u32 data2)
 			netdev_err(bp->dev, "Unknown Thermal threshold type event\n");
 			return false;
 		}
-		if (EVENT_DATA1_THERMAL_THRESHOLD_DIR_INCREASING(data1))
+		if (EVENT_DATA1_THERMAL_THRESHOLD_DIR_INCREASING(data1)) {
 			dir_str = "above";
-		else
+			notify = true;
+		} else {
 			dir_str = "below";
+		}
 		netdev_warn(bp->dev, "Chip temperature has gone %s the %s thermal threshold!\n",
 			    dir_str, threshold_type);
 		netdev_warn(bp->dev, "Temperature (In Celsius), Current: %lu, threshold: %lu\n",
 			    BNXT_EVENT_THERMAL_CURRENT_TEMP(data2),
 			    BNXT_EVENT_THERMAL_THRESHOLD_TEMP(data2));
-		bp->thermal_threshold_type = type;
-		set_bit(BNXT_THERMAL_THRESHOLD_SP_EVENT, &bp->sp_event);
-		return true;
+		if (notify) {
+			bp->thermal_threshold_type = type;
+			set_bit(BNXT_THERMAL_THRESHOLD_SP_EVENT, &bp->sp_event);
+			return true;
+		}
+		return false;
 	}
 	default:
 		netdev_err(bp->dev, "FW reported unknown error type %u\n",
-- 
2.30.1


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