This is a note to let you know that I've just added the patch titled
bnxt_en: fix HWRM error when querying VF temperature
to the 5.4-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:
bnxt_en-fix-hwrm-error-when-querying-vf-temperature.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit f16b12f862f144d60b08003692ecddc45f176bc4
Author: Edwin Peer <edwin.peer@xxxxxxxxxxxx>
Date: Wed Aug 26 01:08:37 2020 -0400
bnxt_en: fix HWRM error when querying VF temperature
[ Upstream commit 12cce90b934bf2b0ed9c339b4d5503e69954351a ]
Firmware returns RESOURCE_ACCESS_DENIED for HWRM_TEMP_MONITORY_QUERY for
VFs. This produces unpleasing error messages in the log when temp1_input
is queried via the hwmon sysfs interface from a VF.
The error is harmless and expected, so silence it and return unknown as
the value. Since the device temperature is not particularly sensitive
information, provide flexibility to change this policy in future by
silencing the error rather than avoiding the HWRM call entirely for VFs.
Fixes: cde49a42a9bb ("bnxt_en: Add hwmon sysfs support to read temperature")
Cc: Marc Smith <msmith626@xxxxxxxxx>
Reported-by: Marc Smith <msmith626@xxxxxxxxx>
Signed-off-by: Edwin Peer <edwin.peer@xxxxxxxxxxxx>
Signed-off-by: Michael Chan <michael.chan@xxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 16462d21fea38..089d7b9cc409d 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -8938,16 +8938,19 @@ static ssize_t bnxt_show_temp(struct device *dev,
struct hwrm_temp_monitor_query_input req = {0};
struct hwrm_temp_monitor_query_output *resp;
struct bnxt *bp = dev_get_drvdata(dev);
- u32 temp = 0;
+ u32 len = 0;
resp = bp->hwrm_cmd_resp_addr;
bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_TEMP_MONITOR_QUERY, -1, -1);
mutex_lock(&bp->hwrm_cmd_lock);
- if (!_hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT))
- temp = resp->temp * 1000; /* display millidegree */
+ if (!_hwrm_send_message_silent(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT))
+ len = sprintf(buf, "%u\n", resp->temp * 1000); /* display millidegree */
mutex_unlock(&bp->hwrm_cmd_lock);
- return sprintf(buf, "%u\n", temp);
+ if (len)
+ return len;
+
+ return sprintf(buf, "unknown\n");
}
static SENSOR_DEVICE_ATTR(temp1_input, 0444, bnxt_show_temp, NULL, 0);
