sh_eth: Mitigate lost statistics updates

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The statistics registers have write-clear behaviour, which means we
will lose any increment between the read and write.  Mitigate this by
only clearing when we read a non-zero value, so we will never falsely
report a total of zero.  This also saves time as we only handle
error statistics here and they won't often be incremented.

Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Ben Hutchings 2015-02-26 20:35:05 +00:00 • committed by David S. Miller

parent e5fd13f476

commit 4398f9c817

1 changed files with 25 additions and 12 deletions

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drivers/net/ethernet/renesas/sh_eth.c

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