netdev - Re: [PATCH 1/1 net-next] fec: net: put tx to napi poll function to fix dead lock

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Thu, 28 Feb 2013 15:39:42 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	Frank.Li@...escale.com
Cc:	lznuaa@...il.com, shawn.guo@...aro.org, B38611@...escale.com,
	linux-arm-kernel@...ts.infradead.org, netdev@...r.kernel.org,
	s.hauer@...gutronix.de
Subject: Re: [PATCH 1/1 net-next] fec: net: put tx to napi poll function to
 fix dead lock

From: Frank Li <Frank.Li@...escale.com>
Date: Thu, 28 Feb 2013 11:44:20 +0800

> +	int tx_pkts = fec_enet_tx(ndev);
> +
> +	if (tx_pkts)
> +		return budget;

This isn't right, you don't want to finish the NAPI poll because
TX work was done.

Ignore the TX work for poll completion purposes, see
drivers/net/ethernet/broadcom/tg3.c:tg3_poll_work() for
example.
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html