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| author | Doug Berger <opendmb@gmail.com> | 2019-10-17 02:06:32 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-11-10 13:25:32 +0300 |
| commit | 761f73c166c3b0fecf43692762ee0e03092480f0 (patch) | |
| tree | ece1b1a2b310108d4c62615072b35153e0c957fb /include | |
| parent | af3924a97ea10ec3761fd4d7f9f2046febee6a04 (diff) | |
| download | linux-761f73c166c3b0fecf43692762ee0e03092480f0.tar.xz | |
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 'include')
0 files changed, 0 insertions, 0 deletions