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isci: remove SCSI host before detaching from SAS transport

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commit cff549e486 ("scsi: proper state checking and module refcount
handling in scsi_device_get") , the reference count of scsi device was
changed, which could lead to when rmmod with at least on drive attached,
SCSI error handle will run into infinite loop, and lockup the system.

Fix it by remove scsi host first, this way scsi core will not send
commands down after detaching SAS transport.

This is a follow up fix for Benjamin's fix for pm80xx.

See also:
http://www.spinics.net/lists/linux-scsi/msg90088.html

Signed-off-by: Jack Wang <jinpu.wang@profitbricks.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Jack Wang 2015-11-05 12:32:29 +01:00 committed by Martin K. Petersen
parent ce664fb5d4
commit 4927f1fcf9
1 changed files with 2 additions and 2 deletions
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4
drivers/scsi/isci/init.c
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@ -272,11 +272,11 @@ static void isci_unregister(struct isci_host *isci_host)
if (!isci_host)
return;
shost = to_shost(isci_host);
scsi_remove_host(shost);
sas_unregister_ha(&isci_host->sas_ha);
shost = to_shost(isci_host);
sas_remove_host(shost);
scsi_remove_host(shost);
scsi_host_put(shost);
}