diff mbox

mpt3sas: disable ASPM for MPI2 controllers

Message ID 20161228110056.6250-1-ojab@ojab.ru (mailing list archive)
State Superseded, archived
Headers show

Commit Message

ojab // Dec. 28, 2016, 11 a.m. UTC 
MPI2 controllers sometimes got lost (i. e. disappears from
/sys/bus/pci/devices) if ASMP is enabled.

Signed-off-by: ojab <ojab@ojab.ru>
Fixes: https://bugzilla.kernel.org/show_bug.cgi?id=60644
---
Not sure if it's a complete fix, but at least I can't reproduce the issue
locally with it applied.

Also it's my first patch, so I've surely screwed up some formatting etc.

 drivers/scsi/mpt3sas/mpt3sas_scsih.c | 3 +++
 1 file changed, 3 insertions(+)

--
2.10.0
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diff mbox

Patch

diff --git a/drivers/scsi/mpt3sas/mpt3sas_scsih.c b/drivers/scsi/mpt3sas/mpt3sas_scsih.c
index b5c966e..203651a 100644
--- a/drivers/scsi/mpt3sas/mpt3sas_scsih.c
+++ b/drivers/scsi/mpt3sas/mpt3sas_scsih.c
@@ -51,6 +51,7 @@ 
 #include <linux/workqueue.h>
 #include <linux/delay.h>
 #include <linux/pci.h>
+#include <linux/pci-aspm.h>
 #include <linux/interrupt.h>
 #include <linux/aer.h>
 #include <linux/raid_class.h>
@@ -8734,6 +8735,8 @@  _scsih_probe(struct pci_dev *pdev, const struct pci_device_id *id)

 	switch (hba_mpi_version) {
 	case MPI2_VERSION:
+		pci_disable_link_state(pdev, PCIE_LINK_STATE_L0S |
+			PCIE_LINK_STATE_L1 | PCIE_LINK_STATE_CLKPM);
 		/* Use mpt2sas driver host template for SAS 2.0 HBA's */
 		shost = scsi_host_alloc(&mpt2sas_driver_template,
 		  sizeof(struct MPT3SAS_ADAPTER));