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Message-ID: <20220615195507.52ee19df@kernel.org>
Date: Wed, 15 Jun 2022 19:55:07 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: Christian 'Ansuel' Marangi <ansuelsmth@...il.com>
Cc: Giuseppe Cavallaro <peppe.cavallaro@...com>,
Alexandre Torgue <alexandre.torgue@...s.st.com>,
Jose Abreu <joabreu@...opsys.com>,
"David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Paolo Abeni <pabeni@...hat.com>,
Maxime Coquelin <mcoquelin.stm32@...il.com>,
netdev@...r.kernel.org, linux-stm32@...md-mailman.stormreply.com,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [net-next PATCH] net: ethernet: stmicro: stmmac: permit MTU
change with interface up
On Wed, 15 Jun 2022 00:41:41 +0200 Christian 'Ansuel' Marangi wrote:
> + if (netif_running(dev)) {
> + netdev_dbg(priv->dev, "restarting interface to change its MTU\n");
> + stmmac_release(dev);
> +
> + stmmac_open(dev);
> + stmmac_set_filter(priv, priv->hw, dev);
What if stmmac_open() fails because the memory is low or is fragmented?
You'd need to invest more effort into this change and try to allocate
all the resources before shutting the device down.
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