** Description changed:
+ [Impact]
+
This is a request to inclue a patch, submitted to the upstream linux-
hyperv mailing list, in the linux-azure kernels.
Microsoft would like to request this patch in the 16.04 (4.15) and newer
azure kernels. This patch fixes a prior commit, hence the SRU request:
Fixes: 415719160de3 ("Drivers: hv: vmbus: avoid scheduling in interrupt
context in vmbus_initiate_unload()")
The patch specfically performs the following:
"vmbus_wait_for_unload() looks for a CHANNELMSG_UNLOAD_RESPONSE message
coming from Hyper-V. But if the message isn't found for some reason,
the panic path gets hung forever. Add a timeout of 10 seconds to
prevent this."
The requested patch can be found at:
https://lkml.org/lkml/2020/9/13/196
+
+ [Test Case]
+
+ Since the problem depends on a communication failure with the host. I
+ recommend testing for regressions. The change affects when the module is
+ removed or the system is suspended.
+
+ [Regression Potential]
+
+ The change affects the panic path and suspend so any regressions
+ shouldn't be critical.
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https://bugs.launchpad.net/bugs/1895527
Title:
[linux-azure] [SRU] UBUNTU: SAUCE: Drivers: hv: vmbus: Add timeout to
vmbus_wait_for_unload
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