net: dsa: mv88e6xxx: Release mutex between each ATU read

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The PTP code needs low latency access to the PTP hardware timestamps.
Reading all the ATU entries in one go adds a lot of latency to the PTP
code. So take and release the reg_lock mutex for each individual MAC
address in the ATU, allowing the PTP thread jump in between.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Andrew Lunn 2018-02-15 14:38:35 +01:00 • committed by David S. Miller

parent 377cda13a2

commit a61e540634

1 changed files with 8 additions and 6 deletions

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drivers/net/dsa/mv88e6xxx/chip.c

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