From: Jose Ignacio Tornos Martinez <jtornosm@redhat.com>
To: stern@rowland.harvard.edu
Cc: davem@davemloft.net, edumazet@google.com, greg@kroah.com,
jtornosm@redhat.com, kuba@kernel.org,
linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org,
netdev@vger.kernel.org, oneukum@suse.com, pabeni@redhat.com,
stable@vger.kernel.org
Subject: Re: [PATCH v4] net: usb: ax88179_178a: avoid failed operations when device is disconnected
Date: Wed, 6 Dec 2023 13:17:32 +0100 [thread overview]
Message-ID: <20231206121732.7154-1-jtornosm@redhat.com> (raw)
In-Reply-To: <624ad05b-0b90-4d1c-b06b-7a75473401c3@rowland.harvard.edu>
Hello Alan,
> The __ax88179_read_cmd() and __ax88179_write_cmd() routines are
> asynchronous with respect to ax88179_disconnect(), right? Or at least,
> they are if they run as a result of the user closing the network
> interface. Otherwise there wouldn't be any memory ordering issues.
Yes, I think so, they could be asynchronous regarding ax88179_disconnect.
> But the memory barriers you added are not the proper solution. What you
> need here is _synchronization_, not _ordering_. As it is, the memory
> barriers you have added don't do anything; they shouldn't be in the
> patch.
Ok, thank you for the helpful clarification, let me check it better,
I understood it in a wrong way.
> If you would like a more in-depth explanation, let me know.
Thank you for your help, I will try first, I really appreciate this.
Best regards
José Ignacio
next prev parent reply other threads:[~2023-12-06 12:17 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-11-29 15:16 [PATCH] net: usb: ax88179_178a: avoid failed operations when device is disconnected Jose Ignacio Tornos Martinez
2023-11-29 15:33 ` Oliver Neukum
2023-11-29 15:40 ` Alan Stern
2023-11-30 8:41 ` Jose Ignacio Tornos Martinez
2023-11-30 15:50 ` Alan Stern
2023-11-30 17:25 ` Jose Ignacio Tornos Martinez
2023-11-30 18:13 ` Alan Stern
2023-12-01 10:46 ` Jose Ignacio Tornos Martinez
2023-12-01 11:51 ` [PATCH v2] " Jose Ignacio Tornos Martinez
2023-12-01 12:25 ` Greg KH
2023-12-01 13:26 ` [PATCH v3] " Jose Ignacio Tornos Martinez
2023-12-01 16:13 ` Alan Stern
2023-12-01 17:27 ` Jose Ignacio Tornos Martinez
2023-12-01 20:14 ` Oliver Neukum
2023-12-04 11:31 ` Jose Ignacio Tornos Martinez
2023-12-05 13:51 ` [PATCH v4] " Jose Ignacio Tornos Martinez
2023-12-05 18:07 ` Alan Stern
2023-12-06 12:17 ` Jose Ignacio Tornos Martinez [this message]
2023-12-07 11:42 ` [PATCH v5] " Jose Ignacio Tornos Martinez
2023-12-07 16:41 ` Alan Stern
2023-12-07 17:50 ` [PATCH v6] " Jose Ignacio Tornos Martinez
2023-12-07 20:23 ` Alan Stern
2023-12-07 20:32 ` Jakub Kicinski
2023-12-08 4:56 ` Greg KH
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