If the hotplug controller provides a way to reset a slot, use that
before a direct parent bus reset.
Signed-off-by: Alex Williamson <alex.williamson@xxxxxxxxxx>
---
drivers/pci/pci.c | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index d0f313f..f5035f5 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -22,6 +22,7 @@
#include <linux/interrupt.h>
#include <linux/device.h>
#include <linux/pm_runtime.h>
+#include <linux/pci_hotplug.h>
#include <asm-generic/pci-bridge.h>
#include <asm/setup.h>
#include "pci.h"
@@ -3251,6 +3252,20 @@ static int pci_parent_bus_reset(struct pci_dev *dev, int probe)
return 0;
}
+static int pci_dev_reset_slot_function(struct pci_dev *dev, int probe)
+{
+ struct pci_dev *pdev;
+
+ if (dev->subordinate || !dev->slot)
+ return -ENOTTY;
+
+ list_for_each_entry(pdev, &dev->bus->devices, bus_list)
+ if (pdev != dev && pdev->slot == dev->slot)
+ return -ENOTTY;
+
+ return pci_hp_reset_slot(dev->slot->hotplug, probe);
+}
+
static int __pci_dev_reset(struct pci_dev *dev, int probe)
{
int rc;
@@ -3273,6 +3288,10 @@ static int __pci_dev_reset(struct pci_dev *dev, int probe)
if (rc != -ENOTTY)
goto done;
+ rc = pci_dev_reset_slot_function(dev, probe);
+ if (rc != -ENOTTY)
+ goto done;
+
rc = pci_parent_bus_reset(dev, probe);
done:
return rc;
--
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