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| author |   Claudiu Manoil <claudiu.manoil@freescale.com> | 2014-04-30 14:27:21 +0300 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2014-04-30 16:12:23 -0400 |
| commit | 6ce29b0e2a04ea85617cd21099af67449a76f589 (patch) | |
| tree | 646809dbccfa024bccc007e5d4449fff7cefaed0 /tools/perf/scripts/python/call-graph-from-postgresql.py | |
| parent | tcp_cubic: fix the range of delayed_ack (diff) | |
| download | wireguard-linux-6ce29b0e2a04ea85617cd21099af67449a76f589.tar.xz wireguard-linux-6ce29b0e2a04ea85617cd21099af67449a76f589.zip | |
gianfar: Avoid unnecessary reg accesses in adjust_link()
For phy devices that don't issue interrupts upon link
state changes, phylib polls the link state resulting in
repeated calls to adjust_link(), even if the link state
didn't change. As a result, some mac registers are
repeatedly read and written with the same values, which
is not ok.
To fix this, adjust_link() has been refactored to check
first whether the link state has changed and to take action
only if needed, updating mac registers and local state
variables. The 'new_state' local flag, set if one of the
link params changed (link, speed or duplex), has been
rendered useless and removed by this refactoring.
Signed-off-by: Claudiu Manoil <claudiu.manoil@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'tools/perf/scripts/python/call-graph-from-postgresql.py')
0 files changed, 0 insertions, 0 deletions