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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2015-04-13 17:23:36 +0300
committerBjorn Helgaas <bhelgaas@google.com>2015-05-23 04:33:09 +0300
commit0824965140fff1bf640a987dc790d1594a8e0699 (patch)
tree8f0457873f879d9ad43461ace03d6f06a5720596 /drivers/pci
parentd41be3466f4243f1b198b76fe3bcd91d88194f12 (diff)
downloadlinux-0824965140fff1bf640a987dc790d1594a8e0699.tar.xz
PCI: Propagate the "ignore hotplug" setting to parent
Refine the mechanism introduced by commit f244d8b623da ("ACPIPHP / radeon / nouveau: Fix VGA switcheroo problem related to hotplug") to propagate the ignore_hotplug setting of the device to its parent bridge in case hotplug notifications related to the graphics adapter switching are given for the bridge rather than for the device itself (they need to be ignored in both cases). Link: https://bugzilla.kernel.org/show_bug.cgi?id=61891 Link: https://bugs.freedesktop.org/show_bug.cgi?id=88927 Fixes: b440bde74f04 ("PCI: Add pci_ignore_hotplug() to ignore hotplug events for a device") Reported-and-tested-by: tiagdtd-lava <tiagdtd-lava@yahoo.de> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> CC: stable@vger.kernel.org # v3.17+
Diffstat (limited to 'drivers/pci')
-rw-r--r--drivers/pci/pci.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index acc4b6ef78c4..c44393f26fd3 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -4324,6 +4324,17 @@ bool pci_device_is_present(struct pci_dev *pdev)
}
EXPORT_SYMBOL_GPL(pci_device_is_present);
+void pci_ignore_hotplug(struct pci_dev *dev)
+{
+ struct pci_dev *bridge = dev->bus->self;
+
+ dev->ignore_hotplug = 1;
+ /* Propagate the "ignore hotplug" setting to the parent bridge. */
+ if (bridge)
+ bridge->ignore_hotplug = 1;
+}
+EXPORT_SYMBOL_GPL(pci_ignore_hotplug);
+
#define RESOURCE_ALIGNMENT_PARAM_SIZE COMMAND_LINE_SIZE
static char resource_alignment_param[RESOURCE_ALIGNMENT_PARAM_SIZE] = {0};
static DEFINE_SPINLOCK(resource_alignment_lock);