linux-kernel - [PATCH 4.9 055/125] RDMA/srp: Propagate ib_post

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Date:   Wed,  4 Dec 2019 18:56:00 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Sergey Gorenko <sergeygo@...lanox.com>,
        Max Gurtovoy <maxg@...lanox.com>,
        Laurence Oberman <loberman@...hat.com>,
        Bart Van Assche <bvanassche@....org>,
        Doug Ledford <dledford@...hat.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.9 055/125] RDMA/srp: Propagate ib_post_send() failures to the SCSI mid-layer

From: Bart Van Assche <bvanassche@....org>

[ Upstream commit 2ee00f6a98c36f7e4ba07cc33f24cc5a69060cc9 ]

This patch avoids that the SCSI mid-layer keeps retrying forever if
ib_post_send() fails. This was discovered while testing immediate
data support and passing a too large num_sge value to ib_post_send().

Cc: Sergey Gorenko <sergeygo@...lanox.com>
Cc: Max Gurtovoy <maxg@...lanox.com>
Cc: Laurence Oberman <loberman@...hat.com>
Signed-off-by: Bart Van Assche <bvanassche@....org>
Signed-off-by: Doug Ledford <dledford@...hat.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/infiniband/ulp/srp/ib_srp.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/infiniband/ulp/srp/ib_srp.c b/drivers/infiniband/ulp/srp/ib_srp.c
index 74de1ae48d4f7..af68be201c299 100644
--- a/drivers/infiniband/ulp/srp/ib_srp.c
+++ b/drivers/infiniband/ulp/srp/ib_srp.c
@@ -2180,6 +2180,7 @@ static int srp_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *scmnd)
 
 	if (srp_post_send(ch, iu, len)) {
 		shost_printk(KERN_ERR, target->scsi_host, PFX "Send failed\n");
+		scmnd->result = DID_ERROR << 16;
 		goto err_unmap;
 	}
 
-- 
2.20.1