netdev - Re: [PATCH net-next 1/3] net: qede: use return from qede_parse_actions() for flow

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Message-ID: <20240504145916.GD2279@kernel.org>
Date: Sat, 4 May 2024 15:59:16 +0100
From: Simon Horman <horms@...nel.org>
To: Asbjørn Sloth Tønnesen <ast@...erby.net>
Cc: netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Manish Chopra <manishc@...vell.com>
Subject: Re: [PATCH net-next 1/3] net: qede: use return from
 qede_parse_actions() for flow_spec

On Fri, May 03, 2024 at 10:55:01AM +0000, Asbjørn Sloth Tønnesen wrote:
> In qede_flow_spec_to_rule(), when calling
> qede_parse_actions() then the return code
> was only used for a non-zero check, and then
> -EINVAL was returned.
> 
> qede_parse_actions() can currently fail with:
> * -EINVAL
> * -EOPNOTSUPP
> 
> Commit 319a1d19471e ("flow_offload: check for
> basic action hw stats type") broke the implicit
> assumption that it could only fail with -EINVAL,
> by changing it to return -EOPNOTSUPP, when hardware
> stats are requested.
> 
> However AFAICT it's not possible to trigger
> qede_parse_actions() to return -EOPNOTSUPP, when
> called from qede_flow_spec_to_rule(), as hardware
> stats can't be requested by ethtool_rx_flow_rule_create().
> 
> This patch changes qede_flow_spec_to_rule() to use
> the actual return code from qede_parse_actions(),
> so it's no longer assumed that all errors are -EINVAL.
> 
> Only compile tested.
> 
> Signed-off-by: Asbjørn Sloth Tønnesen <ast@...erby.net>

Reviewed-by: Simon Horman <horms@...nel.org>