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[5.15,115/179] scsi: core: sysfs: Fix setting device state to SDEV_RUNNING

Message ID 20211129181722.743219826@linuxfoundation.org
State New
Headers show
Series None | expand

Commit Message

Greg Kroah-Hartman Nov. 29, 2021, 6:18 p.m. UTC 
From: Mike Christie <michael.christie@oracle.com>

[ Upstream commit eb97545d6264b341b06ba7603f52ff6c0b2af6ea ]

This fixes an issue added in commit 4edd8cd4e86d ("scsi: core: sysfs: Fix
hang when device state is set via sysfs") where if userspace is requesting
to set the device state to SDEV_RUNNING when the state is already
SDEV_RUNNING, we return -EINVAL instead of count. The commmit above set ret
to count for this case, when it should have set it to 0.

Link: https://lore.kernel.org/r/20211120164917.4924-1-michael.christie@oracle.com
Fixes: 4edd8cd4e86d ("scsi: core: sysfs: Fix hang when device state is set via sysfs")
Reviewed-by: Lee Duncan <lduncan@suse.com>
Signed-off-by: Mike Christie <michael.christie@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/scsi/scsi_sysfs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/drivers/scsi/scsi_sysfs.c b/drivers/scsi/scsi_sysfs.c
index 9527e734a999a..920aae661c5b2 100644
--- a/drivers/scsi/scsi_sysfs.c
+++ b/drivers/scsi/scsi_sysfs.c
@@ -817,7 +817,7 @@  store_state_field(struct device *dev, struct device_attribute *attr,
 
 	mutex_lock(&sdev->state_mutex);
 	if (sdev->sdev_state == SDEV_RUNNING && state == SDEV_RUNNING) {
-		ret = count;
+		ret = 0;
 	} else {
 		ret = scsi_device_set_state(sdev, state);
 		if (ret == 0 && state == SDEV_RUNNING)