net: mdio: mdio-bcm-unimac: Delay before first poll

With a clock interval of 400 nsec and a 64 bit transactions (32 bit
preamble & 16 bit control & 16 bit data), it is reasonable to assume
the mdio transaction will take 25.6 usec. Add a 30 usec delay before
the first poll to reduce the chance of a 1000-2000 usec sleep.

Reduce the timeout from 1000ms to 100ms as it is unlikely for the bus
to take this long.

Signed-off-by: Justin Chen <[email protected]>
Acked-by: Florian Fainelli <[email protected]>
Signed-off-by: NipaLocal <nipa@local>

Author: Ryceancurry

drivers/net/mdio/mdio-bcm-unimac.c

@@ -81,7 +81,9 @@ static inline unsigned int unimac_mdio_busy(struct unimac_mdio_priv *priv)
 static int unimac_mdio_poll(void *wait_func_data)
 {
 	struct unimac_mdio_priv *priv = wait_func_data;
-	unsigned int timeout = 1000;
+	unsigned int timeout = 100;
+
+	udelay(30);
 
 	do {
 		if (!unimac_mdio_busy(priv))