linux-kernel - [172/244] [SCSI] mpt2sas: Added DID_NO_CONNECT return when driver remove and avoid shutdown call

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Date:	Wed, 28 Sep 2011 15:02:16 -0700
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Kashyap Desai <kashyap.desai@....com>,
	James Bottomley <JBottomley@...allels.com>
Subject: [172/244] [SCSI] mpt2sas: Added DID_NO_CONNECT return when driver remove and avoid shutdown call

3.0-stable review patch.  If anyone has any objections, please let us know.

------------------

From: "Kashyap, Desai" <kashyap.desai@....com>

commit 7821578caa8cb831868989041112ab808029ca65 upstream.

Driver should not call shutdown call from _scsih_remove otherwise,
The scsi midlayer can be deadlocked when devices are removed from the driver
pci_driver->shutdown handler.

Signed-off-by: Kashyap Desai <kashyap.desai@....com>
Signed-off-by: James Bottomley <JBottomley@...allels.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 drivers/scsi/mpt2sas/mpt2sas_scsih.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/drivers/scsi/mpt2sas/mpt2sas_scsih.c
+++ b/drivers/scsi/mpt2sas/mpt2sas_scsih.c
@@ -3698,7 +3698,7 @@ _scsih_qcmd_lck(struct scsi_cmnd *scmd,
 		return 0;
 	}
 
-	if (ioc->pci_error_recovery) {
+	if (ioc->pci_error_recovery || ioc->remove_host) {
 		scmd->result = DID_NO_CONNECT << 16;
 		scmd->scsi_done(scmd);
 		return 0;
@@ -7211,7 +7211,6 @@ _scsih_remove(struct pci_dev *pdev)
 	}
 
 	sas_remove_host(shost);
-	_scsih_shutdown(pdev);
 	list_del(&ioc->list);
 	scsi_remove_host(shost);
 	scsi_host_put(shost);


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