[DPDK/netuio Bug 1655] Kernel crash when hot-unplug igb_uio device while DPDK application is running

[DPDK/netuio Bug 1655] Kernel crash when hot-unplug igb_uio device while DPDK application is running

[bugzilla]

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https://bugs.dpdk.org/show_bug.cgi?id=1655

            Bug ID: 1655
           Summary: Kernel crash when hot-unplug igb_uio device while DPDK
                    application is running
           Product: DPDK
           Version: unspecified
          Hardware: All
                OS: All
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: netuio
          Assignee: dev@dpdk.org
          Reporter: nandinipersad361@gmail.com
  Target Milestone: ---

When device has been bound to igb_uio driver and application is running,
hot-unplugging the device may cause kernel crash.

Reason:
When device is hot-unplugged, igb_uio driver will be removed which will destroy
UIO resources. Later trying to access any UIO resource will cause kernel crash.

Resolution/Workaround:
If using DPDK for PCI HW hot-unplug, prefer to bind device with VFIO instead of
IGB_UIO.

Affected Environment/Platform:
ALL.

Driver/Module:
igb_uio module.

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