net/mlx5: cmdif, Return value improvements

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Make sure that the two basic command interface functions cmd_exec and
cmd_invoke will return well defined return values:

return < 0 : Command execution couldn't be submitted by driver
return > 0 : Command execution couldn't be performed by firmware
return = 0 : Command was executed by FW, Caller must check FW
outbox status.

These statuses are valid for the blocking call of cmd_exec() e.g. when
callback == NULL, in a downstream patch, will refactor the code to
provide the same return value semantics to the callback.

Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Reviewed-by: Moshe Shemesh <moshe@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

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Saeed Mahameed 2019-08-17 02:48:55 -07:00 • committed by Saeed Mahameed

parent 6cb87869ad

commit f086470122

1 changed files with 43 additions and 34 deletions

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drivers/net/ethernet/mellanox/mlx5/core/cmd.c

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