linux-kernel - [PATCH 5.4 096/232] nvmet-tcp: fix maxh2cdata icresp parameter

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Date:   Thu, 16 Apr 2020 15:23:10 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Wenhua Liu <liuw@...are.com>,
        Sagi Grimberg <sagi@...mberg.me>,
        Keith Busch <kbusch@...nel.org>
Subject: [PATCH 5.4 096/232] nvmet-tcp: fix maxh2cdata icresp parameter

From: Sagi Grimberg <sagi@...mberg.me>

commit 9cda34e37489244a8c8628617e24b2dbc8a8edad upstream.

MAXH2CDATA is not zero based. Also no reason to limit ourselves to
1M transfers as we can do more easily. Make this an arbitrary limit
of 16M.

Reported-by: Wenhua Liu <liuw@...are.com>
Cc: stable@...r.kernel.org # v5.0+
Signed-off-by: Sagi Grimberg <sagi@...mberg.me>
Signed-off-by: Keith Busch <kbusch@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/nvme/target/tcp.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/nvme/target/tcp.c
+++ b/drivers/nvme/target/tcp.c
@@ -794,7 +794,7 @@ static int nvmet_tcp_handle_icreq(struct
 	icresp->hdr.pdo = 0;
 	icresp->hdr.plen = cpu_to_le32(icresp->hdr.hlen);
 	icresp->pfv = cpu_to_le16(NVME_TCP_PFV_1_0);
-	icresp->maxdata = cpu_to_le32(0xffff); /* FIXME: support r2t */
+	icresp->maxdata = cpu_to_le32(0x400000); /* 16M arbitrary limit */
 	icresp->cpda = 0;
 	if (queue->hdr_digest)
 		icresp->digest |= NVME_TCP_HDR_DIGEST_ENABLE;