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Thu, 16 Jun 2022 14:52:24 -0700 Received: from twshared14818.18.frc3.facebook.com (2620:10d:c0a8:1b::d) by mail.thefacebook.com (2620:10d:c0a8:83::7) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.28; Thu, 16 Jun 2022 14:52:22 -0700 Received: by devvm225.atn0.facebook.com (Postfix, from userid 425415) id B3EAA108B70A4; Thu, 16 Jun 2022 14:22:23 -0700 (PDT) From: Stefan Roesch To: , , , , CC: , , , , , Subject: [PATCH v9 06/14] iomap: Return -EAGAIN from iomap_write_iter() Date: Thu, 16 Jun 2022 14:22:13 -0700 Message-ID: <20220616212221.2024518-7-shr@fb.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220616212221.2024518-1-shr@fb.com> References: <20220616212221.2024518-1-shr@fb.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-FB-Internal: Safe Content-Type: text/plain X-Proofpoint-ORIG-GUID: KEQ6hLo_zT5wU8uhPxXXZyZlc1YtvqWp X-Proofpoint-GUID: KEQ6hLo_zT5wU8uhPxXXZyZlc1YtvqWp X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.883,Hydra:6.0.517,FMLib:17.11.64.514 definitions=2022-06-16_18,2022-06-16_01,2022-02-23_01 ARC-Message-Signature: i=1; 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dkim=pass header.d=fb.com header.s=facebook header.b=L4nJ8QUV; dmarc=pass (policy=reject) header.from=fb.com; spf=none (imf01.hostedemail.com: domain of "prvs=7166657324=shr@fb.com" has no SPF policy when checking 67.231.145.42) smtp.mailfrom="prvs=7166657324=shr@fb.com" X-Rspam-User: X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: 896464009C X-Stat-Signature: u4p8nw44nexpmgu6pgyefzhh89i87uu7 X-HE-Tag: 1655416345-908033 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: If iomap_write_iter() encounters -EAGAIN, return -EAGAIN to the caller. Signed-off-by: Stefan Roesch --- fs/iomap/buffered-io.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c index 83cf093fcb92..f2e36240079f 100644 --- a/fs/iomap/buffered-io.c +++ b/fs/iomap/buffered-io.c @@ -830,7 +830,13 @@ static loff_t iomap_write_iter(struct iomap_iter *it= er, struct iov_iter *i) length -=3D status; } while (iov_iter_count(i) && length); =20 - return written ? written : status; + if (status =3D=3D -EAGAIN) { + iov_iter_revert(i, written); + return -EAGAIN; + } + if (written) + return written; + return status; } =20 ssize_t --=20 2.30.2