linux-kernel - [04/53] [SCSI] hpsa: Disable ASPM

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Message-Id: <20111123002553.245584197@clark.kroah.org>
Date:	Tue, 22 Nov 2011 16:25:04 -0800
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk, Matthew Garrett <mjg@...hat.com>,
	Mike Miller <mike.miller@...com>,
	James Bottomley <JBottomley@...allels.com>
Subject: [04/53] [SCSI] hpsa: Disable ASPM

3.1-stable review patch.  If anyone has any objections, please let me know.

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

From: Matthew Garrett <mjg@...hat.com>

commit e5a44df85e8d78e5c2d3d2e4f59b460905691e2f upstream.

The Windows driver .inf disables ASPM on hpsa devices. Do the same because the
selection of a non default ASPM policy can cause the device to hang.

Signed-off-by: Matthew Garrett <mjg@...hat.com>
Acked-by: Mike Miller <mike.miller@...com>
Signed-off-by: James Bottomley <JBottomley@...allels.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 drivers/scsi/hpsa.c |    5 +++++
 1 file changed, 5 insertions(+)

--- a/drivers/scsi/hpsa.c
+++ b/drivers/scsi/hpsa.c
@@ -23,6 +23,7 @@
 #include <linux/interrupt.h>
 #include <linux/types.h>
 #include <linux/pci.h>
+#include <linux/pci-aspm.h>
 #include <linux/kernel.h>
 #include <linux/slab.h>
 #include <linux/delay.h>
@@ -3887,6 +3888,10 @@ static int __devinit hpsa_pci_init(struc
 		dev_warn(&h->pdev->dev, "controller appears to be disabled\n");
 		return -ENODEV;
 	}
+
+	pci_disable_link_state(h->pdev, PCIE_LINK_STATE_L0S |
+			       PCIE_LINK_STATE_L1 | PCIE_LINK_STATE_CLKPM);
+
 	err = pci_enable_device(h->pdev);
 	if (err) {
 		dev_warn(&h->pdev->dev, "unable to enable PCI device\n");


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