[13/14] pciehp: add support for bridge resource reallocation

Commit Message

Yinghai Lu Dec. 22, 2009, 11:02 p.m. UTC

None

Patch

diff --git a/drivers/pci/hotplug/pciehp.h b/drivers/pci/hotplug/pciehp.h
index 4ed76b4..78cf0f4 100644
--- a/drivers/pci/hotplug/pciehp.h
+++ b/drivers/pci/hotplug/pciehp.h
@@ -43,6 +43,7 @@  extern int pciehp_poll_mode;
 extern int pciehp_poll_time;
 extern int pciehp_debug;
 extern int pciehp_force;
+extern int pciehp_realloc;
 extern struct workqueue_struct *pciehp_wq;
 
 #define dbg(format, arg...)						\
diff --git a/drivers/pci/hotplug/pciehp_core.c b/drivers/pci/hotplug/pciehp_core.c
index 5674b20..cc3fc5d 100644
--- a/drivers/pci/hotplug/pciehp_core.c
+++ b/drivers/pci/hotplug/pciehp_core.c
@@ -41,6 +41,7 @@  int pciehp_debug;
 int pciehp_poll_mode;
 int pciehp_poll_time;
 int pciehp_force;
+int pciehp_realloc;
 struct workqueue_struct *pciehp_wq;
 
 #define DRIVER_VERSION	"0.4"
@@ -55,10 +56,12 @@  module_param(pciehp_debug, bool, 0644);
 module_param(pciehp_poll_mode, bool, 0644);
 module_param(pciehp_poll_time, int, 0644);
 module_param(pciehp_force, bool, 0644);
+module_param(pciehp_realloc, bool, 0644);
 MODULE_PARM_DESC(pciehp_debug, "Debugging mode enabled or not");
 MODULE_PARM_DESC(pciehp_poll_mode, "Using polling mechanism for hot-plug events or not");
 MODULE_PARM_DESC(pciehp_poll_time, "Polling mechanism frequency, in seconds");
 MODULE_PARM_DESC(pciehp_force, "Force pciehp, even if _OSC and OSHP are missing");
+MODULE_PARM_DESC(pciehp_realloc, "Realloc resources for slot's parent bridge");
 
 #define PCIE_MODULE_NAME "pciehp"
 
@@ -297,6 +300,10 @@  static int pciehp_probe(struct pcie_device *dev)
 	if (!occupied && poweron && POWER_CTRL(ctrl))
 		pciehp_power_off_slot(slot);
 
+	/* Release I/O window of the slots's parent bridge */
+	if (pciehp_realloc)
+		pci_bridge_release_res(dev->port->subordinate);
+
 	return 0;
 
 err_out_free_ctrl_slot:
diff --git a/drivers/pci/hotplug/pciehp_pci.c b/drivers/pci/hotplug/pciehp_pci.c
index 0a16444..f6119e4 100644
--- a/drivers/pci/hotplug/pciehp_pci.c
+++ b/drivers/pci/hotplug/pciehp_pci.c
@@ -166,5 +166,9 @@  int pciehp_unconfigure_device(struct slot *p_slot)
 		pci_dev_put(temp);
 	}
 
+	/* Release I/O window of the slots's parent bridge */
+	if (pciehp_realloc)
+		pci_bridge_release_res(parent);
+
 	return rc;
 }