linux-kernel - Re: [PATCH net v2] net/smc: non blocking recvmsg() return -EAGAIN when no data and signal

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Message-ID: <fc6c27ca-5592-8445-7054-76c9b2ec6de8@linux.ibm.com>
Date:   Thu, 12 May 2022 14:01:37 +0200
From:   Karsten Graul <kgraul@...ux.ibm.com>
To:     Guangguan Wang <guangguan.wang@...ux.alibaba.com>,
        davem@...emloft.net, kuba@...nel.org, tonylu@...ux.alibaba.com
Cc:     linux-s390@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH net v2] net/smc: non blocking recvmsg() return -EAGAIN
 when no data and signal_pending

On 12/05/2022 05:08, Guangguan Wang wrote:
> Non blocking sendmsg will return -EAGAIN when any signal pending
> and no send space left, while non blocking recvmsg return -EINTR
> when signal pending and no data received. This may makes confused.
> As TCP returns -EAGAIN in the conditions described above. Align the
> behavior of smc with TCP.
> 
> Fixes: 846e344eb722 ("net/smc: add receive timeout check")
> Signed-off-by: Guangguan Wang <guangguan.wang@...ux.alibaba.com>
> Reviewed-by: Tony Lu <tonylu@...ux.alibaba.com>
> ---

Acked-by: Karsten Graul <kgraul@...ux.ibm.com>

Thank you.