[04/53] [SCSI] hpsa: Disable ASPM

From: Greg KH
Date: Tue Nov 22 2011 - 19:59:34 EST


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

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

From: Matthew Garrett <mjg@xxxxxxxxxx>

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@xxxxxxxxxx>
Acked-by: Mike Miller <mike.miller@xxxxxx>
Signed-off-by: James Bottomley <JBottomley@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>

---
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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