[3.11.y.z extended stable] Patch "[SCSI] mpt2sas: Don't disable device twice at suspend." has been added to staging queue

Luis Henriques luis.henriques at canonical.com
Wed May 7 11:08:59 UTC 2014

This is a note to let you know that I have just added a patch titled

    [SCSI] mpt2sas: Don't disable device twice at suspend.

to the linux-3.11.y-queue branch of the 3.11.y.z extended stable tree 
which can be found at:


If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.11.y.z tree, see



>From 31f9383f8658d11cb599600cbca98e12fb19c9db Mon Sep 17 00:00:00 2001
From: Tyler Stachecki <tstache1 at binghamton.edu>
Date: Fri, 25 Apr 2014 16:41:04 -0400
Subject: [SCSI] mpt2sas: Don't disable device twice at suspend.

commit af61e27c3f77c7623b5335590ae24b6a5c323e22 upstream.

On suspend, _scsih_suspend calls mpt2sas_base_free_resources, which
in turn calls pci_disable_device if the device is enabled prior to
suspending. However, _scsih_suspend also calls pci_disable_device

Thus, in the event that the device is enabled prior to suspending,
pci_disable_device will be called twice. This patch removes the
duplicate call to pci_disable_device in _scsi_suspend as it is both
unnecessary and results in a kernel oops.

Signed-off-by: Tyler Stachecki <tstache1 at binghamton.edu>
Signed-off-by: James Bottomley <JBottomley at Parallels.com>
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
 drivers/scsi/mpt2sas/mpt2sas_scsih.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/scsi/mpt2sas/mpt2sas_scsih.c b/drivers/scsi/mpt2sas/mpt2sas_scsih.c
index 5100476..029dbbb 100644
--- a/drivers/scsi/mpt2sas/mpt2sas_scsih.c
+++ b/drivers/scsi/mpt2sas/mpt2sas_scsih.c
@@ -8287,7 +8287,6 @@ _scsih_suspend(struct pci_dev *pdev, pm_message_t state)

-	pci_disable_device(pdev);
 	pci_set_power_state(pdev, device_state);
 	return 0;

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