linux-kernel - Re: [net-next v1] net: wwan: t7xx: Parameterize data plane RX BAT and FAG count

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Message-ID: <20250605071240.7133d1a5@kernel.org>
Date: Thu, 5 Jun 2025 07:12:40 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: Jinjian Song <jinjian.song@...ocom.com>
Cc: andrew+netdev@...n.ch, angelogioacchino.delregno@...labora.com,
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Subject: Re: [net-next v1] net: wwan: t7xx: Parameterize data plane RX BAT
 and FAG count

On Wed,  4 Jun 2025 17:17:22 +0800 Jinjian Song wrote:
> The parameters are used by data plane to request RX DMA buffers for the entrire lifetime of
> the driver, so it's best to determine them at the driver load time. Adjusting them after the
> driver has been probed could introduce complex issues (e.g., the DMA buffers may already be
> in use for communication when the parameters are changed. While devlink appears to support
> parameter configuration via driver reload and runtime adjustment, both of these occur after
> the driver has been probed, which doesn't seem very friendly to the overall logic.

no.