linux-kernel - [PATCH 3.2 079/185] PCI: Remove duplicate pci_disable_device() from pcie_portdrv

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Message-ID: <lsq.1388282923.861559681@decadent.org.uk>
Date:	Sun, 29 Dec 2013 03:08:43 +0100
From:	Ben Hutchings <ben@...adent.org.uk>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:	akpm@...ux-foundation.org,
	"David Bulkow" <David.Bulkow@...atus.com>,
	"Yinghai Lu" <yinghai@...nel.org>,
	"Mika Westerberg" <mika.westerberg@...ux.intel.com>,
	"Bjorn Helgaas" <bhelgaas@...gle.com>
Subject: [PATCH 3.2 079/185] PCI: Remove duplicate pci_disable_device()
 from pcie_portdrv_remove()

3.2.54-rc1 review patch.  If anyone has any objections, please let me know.

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

From: Yinghai Lu <yinghai@...nel.org>

commit e7cc5cf74544d97d7b69e2701595037474db1f96 upstream.

The pcie_portdrv .probe() method calls pci_enable_device() once, in
pcie_port_device_register(), but the .remove() method calls
pci_disable_device() twice, in pcie_port_device_remove() and in
pcie_portdrv_remove().

That causes a "disabling already-disabled device" warning when removing a
PCIe port device.  This happens all the time when removing Thunderbolt
devices, but is also easy to reproduce with, e.g.,
"echo 0000:00:1c.3 > /sys/bus/pci/drivers/pcieport/unbind"

This patch removes the disable from pcie_portdrv_remove().

[bhelgaas: changelog, tag for stable]
Reported-by: David Bulkow <David.Bulkow@...atus.com>
Reported-by: Mika Westerberg <mika.westerberg@...ux.intel.com>
Signed-off-by: Yinghai Lu <yinghai@...nel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@...gle.com>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/pci/pcie/portdrv_pci.c | 1 -
 1 file changed, 1 deletion(-)

--- a/drivers/pci/pcie/portdrv_pci.c
+++ b/drivers/pci/pcie/portdrv_pci.c
@@ -151,7 +151,6 @@ static int __devinit pcie_portdrv_probe(
 static void pcie_portdrv_remove(struct pci_dev *dev)
 {
 	pcie_port_device_remove(dev);
-	pci_disable_device(dev);
 }
 
 static int error_detected_iter(struct device *device, void *data)

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