diff options
| author | Doug Berger <opendmb@gmail.com> | 2019-10-16 16:06:32 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-11-10 11:23:27 +0100 |
| commit | 28f36653f00a5adbc3bfe5d6e871d008b0f550cf (patch) | |
| tree | a24c097557e58a3b1db7b50df0b1302c018a8a48 /net/ipv4/tcp_ipv4.c | |
| parent | f4b5e4f1d2b8086445b63c82caf2871f4f692760 (diff) | |
net: bcmgenet: reset 40nm EPHY on energy detect
[ Upstream commit 25382b991d252aed961cd434176240f9de6bb15f ]
The EPHY integrated into the 40nm Set-Top Box devices can falsely
detect energy when connected to a disabled peer interface. When the
peer interface is enabled the EPHY will detect and report the link
as active, but on occasion may get into a state where it is not
able to exchange data with the connected GENET MAC. This issue has
not been observed when the link parameters are auto-negotiated;
however, it has been observed with a manually configured link.
It has been empirically determined that issuing a soft reset to the
EPHY when energy is detected prevents it from getting into this bad
state.
Fixes: 1c1008c793fa ("net: bcmgenet: add main driver file")
Signed-off-by: Doug Berger <opendmb@gmail.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/ipv4/tcp_ipv4.c')
0 files changed, 0 insertions, 0 deletions