The mbuf is NULL issue happens when the device sends the driver
a completion with a wrong request id.
Trigger a reset whenever this happens.
Approved by: cperciva
MFC after: 2 weeks
Sponsored by: Amazon, Inc.
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Details
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cperciva
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- rG FreeBSD src repository
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Buildable 59092 Build 55979: arc lint + arc unit
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This seems like it could be a kernel panic rather than merely logging an error and resetting the device.
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We're using the same approach as in [1] here, in case theres a single bit flip causing a funny RX request ID being processed by the driver (hence the null mbuf) we'd like to maintain networking availability
[1] https://reviews.freebsd.org/D46337