net: atlantic: check rpc result and wait for rpc address

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Artificial HW reliability tests revealed a possible hangup in
the driver. Normally, when device disappears from bus, all
register reads returns 0xFFFFFFFF.

At remote procedure invocation towards FW there is a logic
where result is compared with -1 in a loop.
That caused an infinite loop if hardware due to some issues
disappears from bus.

Add extra result checks to prevent this.

Signed-off-by: Dmitry Bogdanov <dbogdanov@marvell.com>
Signed-off-by: Igor Russkikh <irusskikh@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

...

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Igor Russkikh 2020-02-14 18:44:52 +03:00 • committed by David S. Miller

parent 15beab0a9d

commit e7b5f97e65

1 changed files with 17 additions and 2 deletions

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drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.c

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