Rana Shahout 7ccdd0841b
net/mlx5e: Fix select queue callback ...
The default fallback function used by mlx5e select queue can return
any TX queues in range [0..dev->num_real_tx_queues).
The current implementation assumes that the fallback function returns
a number in the range [0.. number of channels). Actually
dev->num_real_tx_queues = (number of channels) * dev->num_tc;
which is more than the expected range if num_tc is configured and could
lead to crashes.
To fix this we test if num_tc is not configured we can safely return the
fallback suggestion, if not we will reciprocal_scale the fallback
result and normalize it to the desired range.
Fixes: 08fb1dacddranas@mellanox.com >
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com >
Reported-by: Doug Ledford <dledford@redhat.com >
Signed-off-by: David S. Miller <davem@davemloft.net >
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7ccdd0841b