Device states on the bus are saved and restored for all bus resets except
the one initiated through pci_dev_reset. Filling the hole.
Signed-off-by: Sinan Kaya <okaya@xxxxxxxxxxxxxx>
---
drivers/pci/pci.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index aab9d51..8aecab1 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -51,6 +51,10 @@ static void pci_pme_list_scan(struct work_struct *work);
static LIST_HEAD(pci_pme_list);
static DEFINE_MUTEX(pci_pme_list_mutex);
static DECLARE_DELAYED_WORK(pci_pme_work, pci_pme_list_scan);
+static void pci_dev_lock(struct pci_dev *dev);
+static void pci_dev_unlock(struct pci_dev *dev);
+static void pci_bus_save_and_disable(struct pci_bus *bus);
+static void pci_bus_restore(struct pci_bus *bus);
struct pci_pme_device {
struct list_head list;
@@ -3888,8 +3892,18 @@ static int pci_parent_bus_reset(struct pci_dev *dev, int probe)
if (probe)
return 0;
+ if (!probe) {
+ pci_dev_unlock(dev);
+ pci_bus_save_and_disable(dev->bus);
+ }
+
pci_reset_bridge_secondary_bus(dev->bus->self);
+ if (!probe) {
+ pci_bus_restore(dev->bus);
+ pci_dev_lock(dev);
+ }
+
return 0;
}
--
1.9.1
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