Messages in this thread Patch in this message | | | From | Sinan Kaya <> | Subject | [PATCH V2 3/5] PCI: save and restore bus on parent bus reset | Date | Fri, 16 Sep 2016 16:06:32 -0400 |
| |
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@codeaurora.org> --- 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
| |