net: systemport: only update UMAC_CMD if something changed

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The link adjustment callback can be called as frequently as desired by
the PHY library, as such, let's avoid doing a Read/Modify/Write sequence
if nothing changed, which is more than likely since we are interfaced
with a switch device.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Florian Fainelli 2014-05-14 19:32:13 -07:00 • committed by David S. Miller

parent 5f47dfb400

commit d5e32cc7c9

1 changed files with 6 additions and 5 deletions

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11

drivers/net/ethernet/broadcom/bcmsysport.c

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