Commit dee23594 authored by Kai-Heng Feng's avatar Kai-Heng Feng Committed by Jeff Kirsher

e1000e: Make speed detection on hotplugging cable more reliable

After hot plugging 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 59653e64 ("e1000e:
Make watchdog use delayed work"), which essentially introduces some
delay before running the watchdog task.

But there's still a chance that the hot plugging 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: default avatarKai-Heng Feng <kai.heng.feng@canonical.com>
Tested-by: default avatarAaron Brown <aaron.f.brown@intel.com>
Signed-off-by: default avatarJeff Kirsher <jeffrey.t.kirsher@intel.com>
parent d7cb9da1
......@@ -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))
......
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