linux-kernel - [PATCH 7/9] MPT / PCI: Use pci_stop_and_remove_bus_device

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Date:	Fri, 10 Jan 2014 15:27:56 +0100
From:	"Rafael J. Wysocki" <rjw@...ysocki.net>
To:	Bjorn Helgaas <bhelgaas@...gle.com>
Cc:	Yinghai Lu <yinghai@...nel.org>,
	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
	Gu Zheng <guz.fnst@...fujitsu.com>,
	Guo Chao <yan@...ux.vnet.ibm.com>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Mika Westerberg <mika.westerberg@...ux.intel.com>,
	Myron Stowe <myron.stowe@...il.com>,
	Benjamin Herrenschmidt <benh@....ibm.com>,
	linux-scsi@...r.kernel.org, Matthew Garrett <mjg59@...f.ucam.org>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
Subject: [PATCH 7/9] MPT / PCI: Use pci_stop_and_remove_bus_device_locked()

From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>

Race conditions are theoretically possible between the MPT PCI
device removal and the generic PCI bus rescan and device removal
that can be triggered via sysfs.

To avoid those race conditions make the MPT PCI code use
pci_stop_and_remove_bus_device_locked().

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
---
 drivers/message/fusion/mptbase.c    |    2 +-
 drivers/scsi/mpt2sas/mpt2sas_base.c |    2 +-
 drivers/scsi/mpt3sas/mpt3sas_base.c |    2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

Index: linux-pm/drivers/scsi/mpt3sas/mpt3sas_base.c
===================================================================
--- linux-pm.orig/drivers/scsi/mpt3sas/mpt3sas_base.c
+++ linux-pm/drivers/scsi/mpt3sas/mpt3sas_base.c
@@ -131,7 +131,7 @@ static int mpt3sas_remove_dead_ioc_func(
 	pdev = ioc->pdev;
 	if ((pdev == NULL))
 		return -1;
-	pci_stop_and_remove_bus_device(pdev);
+	pci_stop_and_remove_bus_device_locked(pdev);
 	return 0;
 }
 
Index: linux-pm/drivers/scsi/mpt2sas/mpt2sas_base.c
===================================================================
--- linux-pm.orig/drivers/scsi/mpt2sas/mpt2sas_base.c
+++ linux-pm/drivers/scsi/mpt2sas/mpt2sas_base.c
@@ -128,7 +128,7 @@ static int mpt2sas_remove_dead_ioc_func(
 		pdev = ioc->pdev;
 		if ((pdev == NULL))
 			return -1;
-		pci_stop_and_remove_bus_device(pdev);
+		pci_stop_and_remove_bus_device_locked(pdev);
 		return 0;
 }
 
Index: linux-pm/drivers/message/fusion/mptbase.c
===================================================================
--- linux-pm.orig/drivers/message/fusion/mptbase.c
+++ linux-pm/drivers/message/fusion/mptbase.c
@@ -346,7 +346,7 @@ static int mpt_remove_dead_ioc_func(void
 	if ((pdev == NULL))
 		return -1;
 
-	pci_stop_and_remove_bus_device(pdev);
+	pci_stop_and_remove_bus_device_locked(pdev);
 	return 0;
 }
 

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