From: Lino Sanfilippo <LinoSanfilippo@gmx.de>
To: Hariprasad Shenai <hariprasad@chelsio.com>, netdev@vger.kernel.org
Cc: davem@davemloft.net, leedom@chelsio.com, anish@chelsio.com,
nirranjan@chelsio.com, kumaras@chelsio.com,
swise@opengridcomputing.com
Subject: Re: [PATCH net 2/2] cxgb4: Disable interrupts and napi before unregistering netdev
Date: Thu, 26 Mar 2015 22:02:14 +0100 [thread overview]
Message-ID: <551473D6.2050406@gmx.de> (raw)
In-Reply-To: <1427344466-17658-3-git-send-email-hariprasad@chelsio.com>
Hi,
On 26.03.2015 05:34, Hariprasad Shenai wrote:
> Disable interrupts and quiesce rx before unregistering net device to avoid crash
> while unloading driver when traffic is flowing through.
>
> Based on original work by Shameem Khalid <shameem@chelsio.com>
>
just out of curiousity: How can an unregister of a netdevice lead to a
crash caused by traffic? I understand that _freeing_ the device or other
resources is a bad idea as long as irqs are still active. But unregister
should not do anything critical (i am asking since I want to avoid such
problems in my own drivers).
Regards,
Lino
next prev parent reply other threads:[~2015-03-26 21:02 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-26 4:34 [PATCH net 0/2] Fixes ingress queue mapping and other fixes Hariprasad Shenai
2015-03-26 4:34 ` [PATCH net 1/2] cxgb4: Allocate dynamic mem. for egress and ingress queue maps Hariprasad Shenai
2015-03-26 4:34 ` [PATCH net 2/2] cxgb4: Disable interrupts and napi before unregistering netdev Hariprasad Shenai
2015-03-26 21:02 ` Lino Sanfilippo [this message]
2015-03-27 8:54 ` Hariprasad S
2015-03-28 4:20 ` Lino Sanfilippo
2015-03-29 19:26 ` [PATCH net 0/2] Fixes ingress queue mapping and other fixes David Miller
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