net: dsa: qca8k: handle error with qca8k_read operation

qca8k_read can fail. Rework any user to handle error values and
correctly return.

Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ansuel Smith 2021-05-14 22:59:55 +02:00 • committed by David S. Miller
commit 028f5f8ef4