netdev - [PATCH net-next] net: mana: Reduce waiting time if HWC not responding

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Message-Id: <1757537841-5063-1-git-send-email-haiyangz@linux.microsoft.com>
Date: Wed, 10 Sep 2025 13:57:21 -0700
From: Haiyang Zhang <haiyangz@...ux.microsoft.com>
To: linux-hyperv@...r.kernel.org,
	netdev@...r.kernel.org
Cc: haiyangz@...rosoft.com,
	decui@...rosoft.com,
	kys@...rosoft.com,
	wei.liu@...nel.org,
	edumazet@...gle.com,
	davem@...emloft.net,
	kuba@...nel.org,
	pabeni@...hat.com,
	longli@...rosoft.com,
	ssengar@...ux.microsoft.com,
	ernis@...ux.microsoft.com,
	dipayanroy@...ux.microsoft.com,
	kotaranov@...rosoft.com,
	shirazsaleem@...rosoft.com,
	andrew+netdev@...n.ch,
	linux-kernel@...r.kernel.org
Subject: [PATCH net-next] net: mana: Reduce waiting time if HWC not responding

From: Haiyang Zhang <haiyangz@...rosoft.com>

If HW Channel (HWC) is not responding, reduce the waiting time, so further
steps will fail quickly.
This will prevent getting stuck for a long time (30 minutes or more), for
example, during unloading while HWC is not responding.

Signed-off-by: Haiyang Zhang <haiyangz@...rosoft.com>
---
 drivers/net/ethernet/microsoft/mana/hw_channel.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/microsoft/mana/hw_channel.c b/drivers/net/ethernet/microsoft/mana/hw_channel.c
index ef072e24c46d..ada6c78a2bef 100644
--- a/drivers/net/ethernet/microsoft/mana/hw_channel.c
+++ b/drivers/net/ethernet/microsoft/mana/hw_channel.c
@@ -881,7 +881,12 @@ int mana_hwc_send_request(struct hw_channel_context *hwc, u32 req_len,
 	if (!wait_for_completion_timeout(&ctx->comp_event,
 					 (msecs_to_jiffies(hwc->hwc_timeout)))) {
 		if (hwc->hwc_timeout != 0)
-			dev_err(hwc->dev, "HWC: Request timed out!\n");
+			dev_err(hwc->dev, "HWC: Request timed out: %u ms\n",
+				hwc->hwc_timeout);
+
+		/* Reduce further waiting if HWC no response */
+		if (hwc->hwc_timeout > 1)
+			hwc->hwc_timeout = 1;
 
 		err = -ETIMEDOUT;
 		goto out;
-- 
2.34.1