net: dsa: qca8k: clear MASTER_EN after phy read/write

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Clear MDIO_MASTER_EN bit from MDIO_MASTER_CTRL after read/write
operation. The MDIO_MASTER_EN bit is not reset after read/write
operation and the next operation can be wrongly interpreted by the
switch as a mdio operation. This cause a production of wrong/garbage
data from the switch and underfined bheavior. (random port drop,
unplugged port flagged with link up, wrong port speed)
Also on driver remove the MASTER_CTRL can be left set and cause the
malfunction of any next driver using the mdio device.

Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Ansuel Smith 2021-05-14 23:00:07 +02:00 • committed by David S. Miller

parent e4b9977cee

commit 63c33bbfeb

1 changed files with 12 additions and 2 deletions

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14

drivers/net/dsa/qca8k.c

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