@@ -6,6 +6,7 @@
#include <linux/acpi.h>
#include <linux/bitfield.h>
#include <linux/module.h>
+#include <linux/suspend.h>
#include <net/rtnetlink.h>
#include "iosm_ipc_imem.h"
@@ -18,6 +19,7 @@ MODULE_LICENSE("GPL v2");
/* WWAN GUID */
static guid_t wwan_acpi_guid = GUID_INIT(0xbad01b75, 0x22a8, 0x4f48, 0x87, 0x92,
0xbd, 0xde, 0x94, 0x67, 0x74, 0x7d);
+static bool pci_registered;
static void ipc_pcie_resources_release(struct iosm_pcie *ipc_pcie)
{
@@ -448,7 +450,6 @@ static struct pci_driver iosm_ipc_driver = {
},
.id_table = iosm_ipc_ids,
};
-module_pci_driver(iosm_ipc_driver);
int ipc_pcie_addr_map(struct iosm_pcie *ipc_pcie, unsigned char *data,
size_t size, dma_addr_t *mapping, int direction)
@@ -530,3 +531,56 @@ void ipc_pcie_kfree_skb(struct iosm_pcie *ipc_pcie, struct sk_buff *skb)
IPC_CB(skb)->mapping = 0;
dev_kfree_skb(skb);
}
+
+static int pm_notify(struct notifier_block *nb, unsigned long mode, void *_unused)
+{
+ if (mode == PM_HIBERNATION_PREPARE || mode == PM_RESTORE_PREPARE) {
+ if (pci_registered) {
+ pci_unregister_driver(&iosm_ipc_driver);
+ pci_registered = false;
+ }
+ } else if (mode == PM_POST_HIBERNATION || mode == PM_POST_RESTORE) {
+ if (!pci_registered) {
+ int ret;
+
+ ret = pci_register_driver(&iosm_ipc_driver);
+ if (ret) {
+ pr_err(KBUILD_MODNAME ": unable to re-register PCI driver: %d\n",
+ ret);
+ } else {
+ pci_registered = true;
+ }
+ }
+ }
+
+ return 0;
+}
+
+static struct notifier_block pm_notifier = {
+ .notifier_call = pm_notify,
+};
+
+static int __init iosm_ipc_driver_init(void)
+{
+ int ret;
+
+ ret = pci_register_driver(&iosm_ipc_driver);
+ if (ret)
+ return ret;
+
+ pci_registered = true;
+
+ register_pm_notifier(&pm_notifier);
+
+ return 0;
+}
+module_init(iosm_ipc_driver_init);
+
+static void __exit iosm_ipc_driver_exit(void)
+{
+ unregister_pm_notifier(&pm_notifier);
+
+ if (pci_registered)
+ pci_unregister_driver(&iosm_ipc_driver);
+}
+module_exit(iosm_ipc_driver_exit);