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Date:   Mon, 16 Oct 2023 22:35:50 +0200
From:   Ahelenia =?utf-8?Q?Ziemia=C5=84ska?= 
        <nabijaczleweli@nabijaczleweli.xyz>
Cc:     Karsten Graul <kgraul@linux.ibm.com>,
        Wenjia Zhang <wenjia@linux.ibm.com>,
        Jan Karcher <jaka@linux.ibm.com>,
        "D. Wythe" <alibuda@linux.alibaba.com>,
        Tony Lu <tonylu@linux.alibaba.com>,
        Wen Gu <guwen@linux.alibaba.com>,
        "David S. Miller" <davem@davemloft.net>,
        Eric Dumazet <edumazet@google.com>,
        Jakub Kicinski <kuba@kernel.org>,
        Paolo Abeni <pabeni@redhat.com>, linux-s390@vger.kernel.org,
        netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 06/11] net/smc: smc_splice_read: always request MSG_DONTWAIT
Message-ID: <45da5ab094bcc7d3331385e8813074922c2a13c6.1697486714.git.nabijaczleweli@nabijaczleweli.xyz>
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Otherwise we risk sleeping with the pipe locked for indeterminate
lengths of time.

Link: https://lore.kernel.org/linux-fsdevel/qk6hjuam54khlaikf2ssom6custxf5i=
s2ekkaequf4hvode3ls@zgf7j5j4ubvw/t/#u
Signed-off-by: Ahelenia Ziemia=C5=84ska <nabijaczleweli@nabijaczleweli.xyz>
---
 net/smc/af_smc.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/net/smc/af_smc.c b/net/smc/af_smc.c
index bacdd971615e..89473305f629 100644
--- a/net/smc/af_smc.c
+++ b/net/smc/af_smc.c
@@ -3243,12 +3243,8 @@ static ssize_t smc_splice_read(struct socket *sock, =
loff_t *ppos,
 			rc =3D -ESPIPE;
 			goto out;
 		}
-		if (flags & SPLICE_F_NONBLOCK)
-			flags =3D MSG_DONTWAIT;
-		else
-			flags =3D 0;
 		SMC_STAT_INC(smc, splice_cnt);
-		rc =3D smc_rx_recvmsg(smc, NULL, pipe, len, flags);
+		rc =3D smc_rx_recvmsg(smc, NULL, pipe, len, MSG_DONTWAIT);
 	}
 out:
 	release_sock(sk);
--=20
2.39.2

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