From: Kai-Heng Feng <kai.heng.feng@canonical.com>
To: jeffrey.t.kirsher@intel.com
Cc: intel-wired-lan@lists.osuosl.org, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org,
Kai-Heng Feng <kai.heng.feng@canonical.com>
Subject: [PATCH v2] e1000e: Make speed detection on hotplugging cable more reliable
Date: Mon, 15 Jul 2019 20:25:55 +0800 [thread overview]
Message-ID: <20190715122555.11922-1-kai.heng.feng@canonical.com> (raw)
In-Reply-To: <20190715084355.9962-1-kai.heng.feng@canonical.com>
After hotplugging an 1Gbps ethernet cable with 1Gbps link partner, the
MII_BMSR may report 10Mbps, renders the network rather slow.
The issue has much lower fail rate after commit 59653e6497d1 ("e1000e:
Make watchdog use delayed work"), which essentially introduces some
delay before running the watchdog task.
But there's still a chance that the hotplugging event and the queued
watchdog task gets run at the same time, then the original issue can be
observed once again.
So let's use mod_delayed_work() to add a deterministic 1 second delay
before running watchdog task, after an interrupt.
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
---
drivers/net/ethernet/intel/e1000e/netdev.c | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c b/drivers/net/ethernet/intel/e1000e/netdev.c
index e4baa13b3cda..c83bf5349d53 100644
--- a/drivers/net/ethernet/intel/e1000e/netdev.c
+++ b/drivers/net/ethernet/intel/e1000e/netdev.c
@@ -1780,8 +1780,8 @@ static irqreturn_t e1000_intr_msi(int __always_unused irq, void *data)
}
/* guard against interrupt when we're going down */
if (!test_bit(__E1000_DOWN, &adapter->state))
- queue_delayed_work(adapter->e1000_workqueue,
- &adapter->watchdog_task, 1);
+ mod_delayed_work(adapter->e1000_workqueue,
+ &adapter->watchdog_task, HZ);
}
/* Reset on uncorrectable ECC error */
@@ -1861,8 +1861,8 @@ static irqreturn_t e1000_intr(int __always_unused irq, void *data)
}
/* guard against interrupt when we're going down */
if (!test_bit(__E1000_DOWN, &adapter->state))
- queue_delayed_work(adapter->e1000_workqueue,
- &adapter->watchdog_task, 1);
+ mod_delayed_work(adapter->e1000_workqueue,
+ &adapter->watchdog_task, HZ);
}
/* Reset on uncorrectable ECC error */
@@ -1907,8 +1907,8 @@ static irqreturn_t e1000_msix_other(int __always_unused irq, void *data)
hw->mac.get_link_status = true;
/* guard against interrupt when we're going down */
if (!test_bit(__E1000_DOWN, &adapter->state))
- queue_delayed_work(adapter->e1000_workqueue,
- &adapter->watchdog_task, 1);
+ mod_delayed_work(adapter->e1000_workqueue,
+ &adapter->watchdog_task, HZ);
}
if (!test_bit(__E1000_DOWN, &adapter->state))
--
2.17.1
next prev parent reply other threads:[~2019-07-15 12:26 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-15 8:43 [PATCH] e1000e: Make speed detection on hotplugging cable more reliable Kai-Heng Feng
2019-07-15 8:52 ` [Intel-wired-lan] " Paul Menzel
2019-07-15 9:00 ` Kai Heng Feng
2019-07-15 9:06 ` Paul Menzel
2019-07-15 9:21 ` Kai Heng Feng
2019-07-15 12:25 ` Kai-Heng Feng [this message]
2019-07-24 22:52 ` [Intel-wired-lan] [PATCH v2] " Brown, Aaron F
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