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From:   Sasha Levin <sashal@kernel.org>
To:     linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc:     Sreekanth Reddy <sreekanth.reddy@broadcom.com>,
        "Martin K . Petersen" <martin.petersen@oracle.com>,
        Sasha Levin <sashal@kernel.org>
Subject: [PATCH 4.9 28/43] scsi: core: Avoid printing an error if target_alloc() returns -ENXIO
Date:   Tue, 24 Aug 2021 13:05:59 -0400
Message-Id: <20210824170614.710813-29-sashal@kernel.org>
In-Reply-To: <20210824170614.710813-1-sashal@kernel.org>
References: <20210824170614.710813-1-sashal@kernel.org>
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From: Sreekanth Reddy <sreekanth.reddy@broadcom.com>

[ Upstream commit 70edd2e6f652f67d854981fd67f9ad0f1deaea92 ]

Avoid printing a 'target allocation failed' error if the driver
target_alloc() callback function returns -ENXIO. This return value
indicates that the corresponding H:C:T:L entry is empty.

Removing this error reduces the scan time if the user issues SCAN_WILD_CARD
scan operation through sysfs parameter on a host with a lot of empty
H:C:T:L entries.

Avoiding the printk on -ENXIO matches the behavior of the other callback
functions during scanning.

Link: https://lore.kernel.org/r/20210726115402.1936-1-sreekanth.reddy@broadcom.com
Signed-off-by: Sreekanth Reddy <sreekanth.reddy@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/scsi/scsi_scan.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/scsi/scsi_scan.c b/drivers/scsi/scsi_scan.c
index 397deb69c659..e51819e3a508 100644
--- a/drivers/scsi/scsi_scan.c
+++ b/drivers/scsi/scsi_scan.c
@@ -460,7 +460,8 @@ static struct scsi_target *scsi_alloc_target(struct device *parent,
 		error = shost->hostt->target_alloc(starget);
 
 		if(error) {
-			dev_printk(KERN_ERR, dev, "target allocation failed, error %d\n", error);
+			if (error != -ENXIO)
+				dev_err(dev, "target allocation failed, error %d\n", error);
 			/* don't want scsi_target_reap to do the final
 			 * put because it will be under the host lock */
 			scsi_target_destroy(starget);
-- 
2.30.2