ibmvnic: Harden device Command Response Queue handshake

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In some cases, the device or firmware may be busy when the
driver attempts to perform the CRQ initialization handshake.
If the partner is busy, the hypervisor will return the H_CLOSED
return code. The aim of this patch is that, if the device is not
ready, to query the device a number of times, with a small wait
time in between queries. If all initialization requests fail,
the driver will remain in a dormant state, awaiting a signal
from the device that it is ready for operation.

Signed-off-by: Thomas Falcon <tlfalcon@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Thomas Falcon 2020-08-31 11:59:57 -05:00 • committed by David S. Miller

parent 150f29f5e6

commit 36a782fdcc

1 changed files with 18 additions and 1 deletions

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drivers/net/ethernet/ibm/ibmvnic.c

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