Corinna Vinschen
218c597325
net: stmmac: fix up RX flow hash indirection table when setting channels ...
stmmac_reinit_queues() fails to fix up the RX hash. Even if the number
of channels gets restricted, the output of `ethtool -x' indicates that
all RX queues are used:
$ ethtool -l enp0s29f2
Channel parameters for enp0s29f2:
Pre-set maximums:
RX: 8
TX: 8
Other: n/a
Combined: n/a
Current hardware settings:
RX: 8
TX: 8
Other: n/a
Combined: n/a
$ ethtool -x enp0s29f2
RX flow hash indirection table for enp0s29f2 with 8 RX ring(s):
0: 0 1 2 3 4 5 6 7
8: 0 1 2 3 4 5 6 7
[...]
$ ethtool -L enp0s29f2 rx 3
$ ethtool -x enp0s29f2
RX flow hash indirection table for enp0s29f2 with 3 RX ring(s):
0: 0 1 2 3 4 5 6 7
8: 0 1 2 3 4 5 6 7
[...]
Fix this by setting the indirection table according to the number
of specified queues. The result is now as expected:
$ ethtool -L enp0s29f2 rx 3
$ ethtool -x enp0s29f2
RX flow hash indirection table for enp0s29f2 with 3 RX ring(s):
0: 0 1 2 0 1 2 0 1
8: 2 0 1 2 0 1 2 0
[...]
Tested on Intel Elkhart Lake.
Fixes: 0366f7e06a6b ("net: stmmac: add ethtool support for get/set channels")
Signed-off-by: Corinna Vinschen <vinschen@redhat.com>
Link: https://lore.kernel.org/r/20230403121120.489138-1-vinschen@redhat.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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218c597325