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authorEgil Hjelmeland <privat@egil-hjelmeland.no>2017-10-24 18:14:10 +0300
committerDavid S. Miller <davem@davemloft.net>2017-10-26 11:40:32 +0300
commit3c91b0c1de8d013490bbc41ce9ee8810ea5baddd (patch)
tree837720e8983191cdd9b9804988a3d26061c72cbb /net/vmw_vsock/af_vsock.c
parentacfdf7eabea4186a386ba5e656f0c739563cb1a5 (diff)
downloadlinux-3c91b0c1de8d013490bbc41ce9ee8810ea5baddd.tar.xz
net: dsa: lan9303: Do not disable switch fabric port 0 at .probe
Make the LAN9303 work when lan9303_probe() is called twice. For some unknown reason the LAN9303 switch fail to forward data when switch fabric port 0 TX is disabled during probe. (Write of LAN9303_MAC_TX_CFG_0 in lan9303_disable_processing_port().) In that situation the switch fabric seem to receive frames, because the ALR is learning addresses. But no frames are transmitted on any of the ports. In our system lan9303_probe() is called twice, first time dsa_register_switch() return -EPROBE_DEFER. As an experiment, modified the code to skip writing LAN9303_MAC_TX_CFG_0, port 0 during the first probe. Then the switch works as expected. Resolve the problem by not calling lan9303_disable_processing_port() on port 0 during probe. Ports 1 and 2 are still disabled. Although unsatisfying that the exact failure mechanism is not known, the patch should not cause any harm. Signed-off-by: Egil Hjelmeland <privat@egil-hjelmeland.no> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/vmw_vsock/af_vsock.c')
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