SRU request submitted:
https://lists.ubuntu.com/archives/kernel-team/2018-April/092020.html
** Description changed:
+ == SRU Justification ==
+ Linux kernel 4.15 has introduced a bug in e1000e msix interrupt drivers,
+ which violates the e1000e specification. Specifically, the driver
+ configures auto-clearing of the "OTHER" interrupt types, and the "OTHER"
interrupt
+ handler expects to see an uncleared interrupt source for the "OTHER" types;
+ consequently, the link state change interrupts are not identified by the
driver,
+ and thus the virtual E1000e device doesn't function correctly inside VMware
VMs.
+
+ This patch Fixes: 4aea7a5c5e94 ("e1000e: Avoid receiver overrun
+ interrupt bursts")
+
+ == Fix ==
+ 745d0bd3af99 ("e1000e: Remove Other from EIAC")
+
+ == Regression Potential ==
+ Low. Fixes an existing regression and limited to e1000e driver.
+
+ == Test Case ==
+ A test kernel was built with this patch and tested by the original bug
reporter.
+ The bug reporter states the test kernel resolved the bug.
+
+
+
+ == Original Bug Description ==
Hi Ubuntu folks,
Linux kernel 4.15 has introduced a bug in e1000e msix interrupt drivers,
which violates the e1000e specification. Specifically, the driver
configures auto-clearing of the "OTHER" interrupt types, and the "OTHER"
interrupt handler expects to see an uncleared interrupt source for the
"OTHER" types; consequently, the link state change interrupts are not
identified by the driver, and thus the virtual E1000e device doesn't
function correctly inside VMware VMs.
I have verified that Linux kernel 4.16.2 has fixed the issues and our
on-perm QE has verified 4.16-RC functions correctly inside VMware VMs.
Could you please crossport the fix from linux-4.16 into Ubuntu 18.04
that would be frozen in 2 days? Here are the change history:
https://lkml.org/lkml/2018/3/25/248
Benjamin Poirier (7):
e1000e: Remove Other from EIAC
Partial revert "e1000e: Avoid receiver overrun interrupt bursts"
e1000e: Fix queue interrupt re-raising in Other interrupt
e1000e: Avoid missed interrupts following ICR read
e1000e: Fix check_for_link return value with autoneg off
Revert "e1000e: Separate signaling for link check/link up"
e1000e: Fix link check race condition
Thanks,
-zheng
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https://bugs.launchpad.net/bugs/1764892
Title:
e1000e msix interrupts broken in linux-image-4.15.0-15-generic
Status in linux package in Ubuntu:
In Progress
Status in linux source package in Bionic:
In Progress
Bug description:
== SRU Justification ==
Linux kernel 4.15 has introduced a bug in e1000e msix interrupt drivers,
which violates the e1000e specification. Specifically, the driver
configures auto-clearing of the "OTHER" interrupt types, and the "OTHER"
interrupt
handler expects to see an uncleared interrupt source for the "OTHER" types;
consequently, the link state change interrupts are not identified by the
driver,
and thus the virtual E1000e device doesn't function correctly inside VMware
VMs.
This patch Fixes: 4aea7a5c5e94 ("e1000e: Avoid receiver overrun
interrupt bursts")
== Fix ==
745d0bd3af99 ("e1000e: Remove Other from EIAC")
== Regression Potential ==
Low. Fixes an existing regression and limited to e1000e driver.
== Test Case ==
A test kernel was built with this patch and tested by the original bug
reporter.
The bug reporter states the test kernel resolved the bug.
== Original Bug Description ==
Hi Ubuntu folks,
Linux kernel 4.15 has introduced a bug in e1000e msix interrupt
drivers, which violates the e1000e specification. Specifically, the
driver configures auto-clearing of the "OTHER" interrupt types, and
the "OTHER" interrupt handler expects to see an uncleared interrupt
source for the "OTHER" types; consequently, the link state change
interrupts are not identified by the driver, and thus the virtual
E1000e device doesn't function correctly inside VMware VMs.
I have verified that Linux kernel 4.16.2 has fixed the issues and our
on-perm QE has verified 4.16-RC functions correctly inside VMware VMs.
Could you please crossport the fix from linux-4.16 into Ubuntu 18.04
that would be frozen in 2 days? Here are the change history:
https://lkml.org/lkml/2018/3/25/248
Benjamin Poirier (7):
e1000e: Remove Other from EIAC
Partial revert "e1000e: Avoid receiver overrun interrupt bursts"
e1000e: Fix queue interrupt re-raising in Other interrupt
e1000e: Avoid missed interrupts following ICR read
e1000e: Fix check_for_link return value with autoneg off
Revert "e1000e: Separate signaling for link check/link up"
e1000e: Fix link check race condition
Thanks,
-zheng
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