net: bcmgenet: 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, since these register accesses can be
expensive.

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

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Florian Fainelli 2014-07-21 17:42:39 -07:00 • committed by David S. Miller

parent bb1fed7110

commit 240524089d

1 changed files with 3 additions and 2 deletions

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5

drivers/net/ethernet/broadcom/genet/bcmmii.c

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