net: bcmgenet: improve TX timeout

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Dump useful ring statistics along with interrupt status, software
maintained pointers and hardware registers to help troubleshoot TX queue
stalls.

When a timeout occurs, disable TX NAPI for the rings, dump their states
while interrupts are disabled, re-enable interrupts, NAPI and queue flow
control to help with the recovery.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Florian Fainelli 2015-06-04 16:15:50 -07:00 • committed by David S. Miller

parent 80edb722b9

commit 13ea657806

1 changed files with 67 additions and 0 deletions

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drivers/net/ethernet/broadcom/genet/bcmgenet.c

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