netdev - Re: [PATCH net-next 1/1] sfc: Allow driver to cope with a lower number of VIs than it needs for RSS

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Date:	Fri, 28 Aug 2015 13:54:07 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	sshah@...arflare.com
Cc:	netdev@...r.kernel.org, linux-net-drivers@...arflare.com
Subject: Re: [PATCH net-next 1/1] sfc: Allow driver to cope with a lower
 number of VIs than it needs for RSS

From: Shradha Shah <sshah@...arflare.com>
Date: Fri, 28 Aug 2015 10:55:42 +0100

> Previously, the driver would refuse to load if it couldn't secure
> enough VIs from the MC to fulfill its RSS requirements.
> This was causing probe to fail on later functions in
> configurations where we'd run out of VIs, such as having many
> VFs.
> 
> This change allows the driver to load with fewer VIs, down to a
> minimum of 2. A warning will be printed saying that RSS
> requirements were not met, possibly affecting performance.
> 
> efx->max_tx_channels needs to be set to avoid going down the
> failure path in efx_probe_nic() immediately in the loop after the
> probe() NIC-type function.
> Also, Set rc=ENOSPC when bombing out of efx_probe_nic due to lack
> of VIs.
> 
> Signed-off-by: Shradha Shah <sshah@...arflare.com>

Applied, thanks.
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