liquidio: fix kernel panic when NIC firmware is older than 1.7.2

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Pre-1.7.2 NIC firmware does not support (and does not respond to) the "get
speed" command which is sent by the 1.7.2 driver (for CN23XX-225 cards
only) during modprobe.  Due to a bug in older firmware (with respect to
unknown commands), this unsupported command causes a cascade of errors that
ends in a kernel panic.

Fix it by making the sending of the "get speed" command conditional on the
firmware version.

Signed-off-by: Rick Farrington <ricardo.farrington@cavium.com>
Signed-off-by: Felix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

...

This commit is contained in:

Rick Farrington 2018-07-06 11:27:07 -07:00 • committed by David S. Miller

parent 9ebcb397aa

commit 4fed38cf26

2 changed files with 33 additions and 2 deletions

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26

drivers/net/ethernet/cavium/liquidio/lio_main.c

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9

drivers/net/ethernet/cavium/liquidio/octeon_device.h

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