Messages in this thread | | | Subject | Re: [PATCH v5 net-next 05/10] net: switchdev: pass flags and mask to both {PRE_,}BRIDGE_FLAGS attributes | From | Florian Fainelli <> | Date | Fri, 12 Feb 2021 10:10:37 -0800 |
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On 2/12/2021 7:15 AM, Vladimir Oltean wrote: > From: Vladimir Oltean <vladimir.oltean@nxp.com> > > This switchdev attribute offers a counterproductive API for a driver > writer, because although br_switchdev_set_port_flag gets passed a > "flags" and a "mask", those are passed piecemeal to the driver, so while > the PRE_BRIDGE_FLAGS listener knows what changed because it has the > "mask", the BRIDGE_FLAGS listener doesn't, because it only has the final > value. But certain drivers can offload only certain combinations of > settings, like for example they cannot change unicast flooding > independently of multicast flooding - they must be both on or both off. > The way the information is passed to switchdev makes drivers not > expressive enough, and unable to reject this request ahead of time, in > the PRE_BRIDGE_FLAGS notifier, so they are forced to reject it during > the deferred BRIDGE_FLAGS attribute, where the rejection is currently > ignored. > > This patch also changes drivers to make use of the "mask" field for edge > detection when possible. > > Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> -- Florian
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