linux-kernel - [PATCH net-next] gve: Move gve_init_clock to after AQ CONFIGURE_DEVICE

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Message-ID: <20251202200207.1434749-1-hramamurthy@google.com>
Date: Tue,  2 Dec 2025 20:02:07 +0000
From: Harshitha Ramamurthy <hramamurthy@...gle.com>
To: netdev@...r.kernel.org
Cc: joshwash@...gle.com, hramamurthy@...gle.com, andrew+netdev@...n.ch, 
	davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com, 
	richardcochran@...il.com, willemb@...gle.com, pkaligineedi@...gle.com, 
	thostet@...gle.com, linux-kernel@...r.kernel.org, 
	Ankit Garg <nktgrg@...gle.com>
Subject: [PATCH net-next] gve: Move gve_init_clock to after AQ
 CONFIGURE_DEVICE_RESOURCES call

From: Tim Hostetler <thostet@...gle.com>

commit 46e7860ef941 ("gve: Move ptp_schedule_worker to gve_init_clock")
moved the first invocation of the AQ command REPORT_NIC_TIMESTAMP to
gve_probe(). However, gve_init_clock() invoking REPORT_NIC_TIMESTAMP is
not valid until after gve_probe() invokes the AQ command
CONFIGURE_DEVICE_RESOURCES.

Failure to do so results in the following error:

gve 0000:00:07.0: failed to read NIC clock -11

This was missed earlier because the driver under test was loaded at
runtime instead of boot-time. The boot-time driver had already
initialized the device, causing the runtime driver to successfully call
gve_init_clock() incorrectly.

Fixes: 46e7860ef941 ("gve: Move ptp_schedule_worker to gve_init_clock")
Reviewed-by: Ankit Garg <nktgrg@...gle.com>
Signed-off-by: Tim Hostetler <thostet@...gle.com>
Signed-off-by: Harshitha Ramamurthy <hramamurthy@...gle.com>
---
 drivers/net/ethernet/google/gve/gve_main.c | 17 ++++++++++-------
 1 file changed, 10 insertions(+), 7 deletions(-)

diff --git a/drivers/net/ethernet/google/gve/gve_main.c b/drivers/net/ethernet/google/gve/gve_main.c
index ace4ff4c6b3a..8fc9ea930fdc 100644
--- a/drivers/net/ethernet/google/gve/gve_main.c
+++ b/drivers/net/ethernet/google/gve/gve_main.c
@@ -657,12 +657,9 @@ static int gve_setup_device_resources(struct gve_priv *priv)
 	err = gve_alloc_counter_array(priv);
 	if (err)
 		goto abort_with_rss_config_cache;
-	err = gve_init_clock(priv);
-	if (err)
-		goto abort_with_counter;
 	err = gve_alloc_notify_blocks(priv);
 	if (err)
-		goto abort_with_clock;
+		goto abort_with_counter;
 	err = gve_alloc_stats_report(priv);
 	if (err)
 		goto abort_with_ntfy_blocks;
@@ -693,10 +690,16 @@ static int gve_setup_device_resources(struct gve_priv *priv)
 		}
 	}
 
+	err = gve_init_clock(priv);
+	if (err) {
+		dev_err(&priv->pdev->dev, "Failed to init clock");
+		goto abort_with_ptype_lut;
+	}
+
 	err = gve_init_rss_config(priv, priv->rx_cfg.num_queues);
 	if (err) {
 		dev_err(&priv->pdev->dev, "Failed to init RSS config");
-		goto abort_with_ptype_lut;
+		goto abort_with_clock;
 	}
 
 	err = gve_adminq_report_stats(priv, priv->stats_report_len,
@@ -708,6 +711,8 @@ static int gve_setup_device_resources(struct gve_priv *priv)
 	gve_set_device_resources_ok(priv);
 	return 0;
 
+abort_with_clock:
+	gve_teardown_clock(priv);
 abort_with_ptype_lut:
 	kvfree(priv->ptype_lut_dqo);
 	priv->ptype_lut_dqo = NULL;
@@ -715,8 +720,6 @@ abort_with_stats_report:
 	gve_free_stats_report(priv);
 abort_with_ntfy_blocks:
 	gve_free_notify_blocks(priv);
-abort_with_clock:
-	gve_teardown_clock(priv);
 abort_with_counter:
 	gve_free_counter_array(priv);
 abort_with_rss_config_cache:
-- 
2.52.0.487.g5c8c507ade-goog