PCI: hotplug: Use list_for_each_entry() to simplify code

Use list_for_each_entry() instead of list_for_each() to simplify the code. Signed-off-by: Geliang Tang <geliangtang@163.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
git-mirror · Jan 10, 2016 · 2ac83cc · 2ac83cc
1 parent 1b47fd4
commit 2ac83cc
Show file tree

Hide file tree

Showing 10 changed files with 46 additions and 88 deletions.
diff --git a/drivers/pci/hotplug/ibmphp_core.c b/drivers/pci/hotplug/ibmphp_core.c
@@ -116,11 +116,9 @@ static inline int slot_update(struct slot **sl)
 static int __init get_max_slots (void)
 {
 	struct slot *slot_cur;
-	struct list_head *tmp;
 	u8 slot_count = 0;
 
-	list_for_each(tmp, &ibmphp_slot_head) {
-		slot_cur = list_entry(tmp, struct slot, ibm_slot_list);
+	list_for_each_entry(slot_cur, &ibmphp_slot_head, ibm_slot_list) {
 		/* sometimes the hot-pluggable slots start with 4 (not always from 1) */
 		slot_count = max(slot_count, slot_cur->number);
 	}
@@ -501,13 +499,10 @@ static int get_bus_name(struct hotplug_slot *hotplug_slot, char *value)
 static int __init init_ops(void)
 {
 	struct slot *slot_cur;
-	struct list_head *tmp;
 	int retval;
 	int rc;
 
-	list_for_each(tmp, &ibmphp_slot_head) {
-		slot_cur = list_entry(tmp, struct slot, ibm_slot_list);
-
+	list_for_each_entry(slot_cur, &ibmphp_slot_head, ibm_slot_list) {
 		if (!slot_cur)
 			return -ENODEV;
 
@@ -669,9 +664,7 @@ static struct pci_func *ibm_slot_find(u8 busno, u8 device, u8 function)
 {
 	struct pci_func *func_cur;
 	struct slot *slot_cur;
-	struct list_head *tmp;
-	list_for_each(tmp, &ibmphp_slot_head) {
-		slot_cur = list_entry(tmp, struct slot, ibm_slot_list);
+	list_for_each_entry(slot_cur, &ibmphp_slot_head, ibm_slot_list) {
 		if (slot_cur->func) {
 			func_cur = slot_cur->func;
 			while (func_cur) {
@@ -693,14 +686,12 @@ static struct pci_func *ibm_slot_find(u8 busno, u8 device, u8 function)
  *************************************************************/
 static void free_slots(void)
 {
-	struct slot *slot_cur;
-	struct list_head *tmp;
-	struct list_head *next;
+	struct slot *slot_cur, *next;
 
 	debug("%s -- enter\n", __func__);
 
-	list_for_each_safe(tmp, next, &ibmphp_slot_head) {
-		slot_cur = list_entry(tmp, struct slot, ibm_slot_list);
+	list_for_each_entry_safe(slot_cur, next, &ibmphp_slot_head,
+				 ibm_slot_list) {
 		pci_hp_deregister(slot_cur->hotplug_slot);
 	}
 	debug("%s -- exit\n", __func__);

diff --git a/drivers/pci/hotplug/ibmphp_ebda.c b/drivers/pci/hotplug/ibmphp_ebda.c
@@ -1117,25 +1117,21 @@ int ibmphp_get_bus_index (u8 num)
 
 void ibmphp_free_bus_info_queue (void)
 {
-	struct bus_info *bus_info;
-	struct list_head *list;
-	struct list_head *next;
+	struct bus_info *bus_info, *next;
 
-	list_for_each_safe (list, next, &bus_info_head ) {
-		bus_info = list_entry (list, struct bus_info, bus_info_list);
+	list_for_each_entry_safe(bus_info, next, &bus_info_head,
+				 bus_info_list) {
 		kfree (bus_info);
 	}
 }
 
 void ibmphp_free_ebda_hpc_queue (void)
 {
-	struct controller *controller = NULL;
-	struct list_head *list;
-	struct list_head *next;
+	struct controller *controller = NULL, *next;
 	int pci_flag = 0;
 
-	list_for_each_safe (list, next, &ebda_hpc_head) {
-		controller = list_entry (list, struct controller, ebda_hpc_list);
+	list_for_each_entry_safe(controller, next, &ebda_hpc_head,
+				 ebda_hpc_list) {
 		if (controller->ctlr_type == 0)
 			release_region (controller->u.isa_ctlr.io_start, (controller->u.isa_ctlr.io_end - controller->u.isa_ctlr.io_start + 1));
 		else if ((controller->ctlr_type == 1) && (!pci_flag)) {
@@ -1148,12 +1144,10 @@ void ibmphp_free_ebda_hpc_queue (void)
 
 void ibmphp_free_ebda_pci_rsrc_queue (void)
 {
-	struct ebda_pci_rsrc *resource;
-	struct list_head *list;
-	struct list_head *next;
+	struct ebda_pci_rsrc *resource, *next;
 
-	list_for_each_safe (list, next, &ibmphp_ebda_pci_rsrc_head) {
-		resource = list_entry (list, struct ebda_pci_rsrc, ebda_pci_rsrc_list);
+	list_for_each_entry_safe(resource, next, &ibmphp_ebda_pci_rsrc_head,
+				 ebda_pci_rsrc_list) {
 		kfree (resource);
 		resource = NULL;
 	}

diff --git a/drivers/pci/hotplug/ibmphp_hpc.c b/drivers/pci/hotplug/ibmphp_hpc.c
@@ -537,7 +537,6 @@ int ibmphp_hpc_readslot (struct slot *pslot, u8 cmd, u8 *pstatus)
 {
 	void __iomem *wpg_bbar = NULL;
 	struct controller *ctlr_ptr;
-	struct list_head *pslotlist;
 	u8 index, status;
 	int rc = 0;
 	int busindex;
@@ -628,8 +627,8 @@ int ibmphp_hpc_readslot (struct slot *pslot, u8 cmd, u8 *pstatus)
 
 			// Not used
 		case READ_ALLSLOT:
-			list_for_each (pslotlist, &ibmphp_slot_head) {
-				pslot = list_entry (pslotlist, struct slot, ibm_slot_list);
+			list_for_each_entry(pslot, &ibmphp_slot_head,
+					    ibm_slot_list) {
 				index = pslot->ctlr_index;
 				rc = hpc_wait_ctlr_notworking (HPC_CTLR_WORKING_TOUT, ctlr_ptr,
 								wpg_bbar, &status);
@@ -820,7 +819,6 @@ static int poll_hpc(void *data)
 {
 	struct slot myslot;
 	struct slot *pslot = NULL;
-	struct list_head *pslotlist;
 	int rc;
 	int poll_state = POLL_LATCH_REGISTER;
 	u8 oldlatchlow = 0x00;
@@ -838,10 +836,10 @@ static int poll_hpc(void *data)
 		case POLL_LATCH_REGISTER:
 			oldlatchlow = curlatchlow;
 			ctrl_count = 0x00;
-			list_for_each (pslotlist, &ibmphp_slot_head) {
+			list_for_each_entry(pslot, &ibmphp_slot_head,
+					    ibm_slot_list) {
 				if (ctrl_count >= ibmphp_get_total_controllers())
 					break;
-				pslot = list_entry (pslotlist, struct slot, ibm_slot_list);
 				if (pslot->ctrl->ctlr_relative_id == ctrl_count) {
 					ctrl_count++;
 					if (READ_SLOT_LATCH (pslot->ctrl)) {
@@ -859,8 +857,8 @@ static int poll_hpc(void *data)
 			poll_state = POLL_SLEEP;
 			break;
 		case POLL_SLOTS:
-			list_for_each (pslotlist, &ibmphp_slot_head) {
-				pslot = list_entry (pslotlist, struct slot, ibm_slot_list);
+			list_for_each_entry(pslot, &ibmphp_slot_head,
+					    ibm_slot_list) {
 				// make a copy of the old status
 				memcpy ((void *) &myslot, (void *) pslot,
 					sizeof (struct slot));
@@ -870,10 +868,10 @@ static int poll_hpc(void *data)
 					process_changeinstatus (pslot, &myslot);
 			}
 			ctrl_count = 0x00;
-			list_for_each (pslotlist, &ibmphp_slot_head) {
+			list_for_each_entry(pslot, &ibmphp_slot_head,
+					    ibm_slot_list) {
 				if (ctrl_count >= ibmphp_get_total_controllers())
 					break;
-				pslot = list_entry (pslotlist, struct slot, ibm_slot_list);
 				if (pslot->ctrl->ctlr_relative_id == ctrl_count) {
 					ctrl_count++;
 					if (READ_SLOT_LATCH (pslot->ctrl))

diff --git a/drivers/pci/hotplug/ibmphp_res.c b/drivers/pci/hotplug/ibmphp_res.c
@@ -203,15 +203,13 @@ int __init ibmphp_rsrc_init (void)
 	struct bus_node *newbus = NULL;
 	struct bus_node *bus_cur;
 	struct bus_node *bus_prev;
-	struct list_head *tmp;
 	struct resource_node *new_io = NULL;
 	struct resource_node *new_mem = NULL;
 	struct resource_node *new_pfmem = NULL;
 	int rc;
-	struct list_head *tmp_ebda;
 
-	list_for_each (tmp_ebda, &ibmphp_ebda_pci_rsrc_head) {
-		curr = list_entry (tmp_ebda, struct ebda_pci_rsrc, ebda_pci_rsrc_list);
+	list_for_each_entry(curr, &ibmphp_ebda_pci_rsrc_head,
+			    ebda_pci_rsrc_list) {
 		if (!(curr->rsrc_type & PCIDEVMASK)) {
 			/* EBDA still lists non PCI devices, so ignore... */
 			debug ("this is not a PCI DEVICE in rsrc_init, please take care\n");
@@ -369,8 +367,7 @@ int __init ibmphp_rsrc_init (void)
 		}
 	}
 
-	list_for_each (tmp, &gbuses) {
-		bus_cur = list_entry (tmp, struct bus_node, bus_list);
+	list_for_each_entry(bus_cur, &gbuses, bus_list) {
 		/* This is to get info about PPB resources, since EBDA doesn't put this info into the primary bus info */
 		rc = update_bridge_ranges (&bus_cur);
 		if (rc)
@@ -1571,19 +1568,16 @@ int ibmphp_find_resource (struct bus_node *bus, u32 start_address, struct resour
  ***********************************************************************/
 void ibmphp_free_resources (void)
 {
-	struct bus_node *bus_cur = NULL;
+	struct bus_node *bus_cur = NULL, *next;
 	struct bus_node *bus_tmp;
 	struct range_node *range_cur;
 	struct range_node *range_tmp;
 	struct resource_node *res_cur;
 	struct resource_node *res_tmp;
-	struct list_head *tmp;
-	struct list_head *next;
 	int i = 0;
 	flags = 1;
 
-	list_for_each_safe (tmp, next, &gbuses) {
-		bus_cur = list_entry (tmp, struct bus_node, bus_list);
+	list_for_each_entry_safe(bus_cur, next, &gbuses, bus_list) {
 		if (bus_cur->noIORanges) {
 			range_cur = bus_cur->rangeIO;
 			for (i = 0; i < bus_cur->noIORanges; i++) {
@@ -1691,10 +1685,8 @@ static int __init once_over (void)
 	struct resource_node *pfmem_prev;
 	struct resource_node *mem;
 	struct bus_node *bus_cur;
-	struct list_head *tmp;
 
-	list_for_each (tmp, &gbuses) {
-		bus_cur = list_entry (tmp, struct bus_node, bus_list);
+	list_for_each_entry(bus_cur, &gbuses, bus_list) {
 		if ((!bus_cur->rangePFMem) && (bus_cur->firstPFMem)) {
 			for (pfmem_cur = bus_cur->firstPFMem, pfmem_prev = NULL; pfmem_cur; pfmem_prev = pfmem_cur, pfmem_cur = pfmem_cur->next) {
 				pfmem_cur->fromMem = 1;
@@ -1767,14 +1759,10 @@ struct bus_node *ibmphp_find_res_bus (u8 bus_number)
 static struct bus_node *find_bus_wprev (u8 bus_number, struct bus_node **prev, u8 flag)
 {
 	struct bus_node *bus_cur;
-	struct list_head *tmp;
-	struct list_head *tmp_prev;
 
-	list_for_each (tmp, &gbuses) {
-		tmp_prev = tmp->prev;
-		bus_cur = list_entry (tmp, struct bus_node, bus_list);
+	list_for_each_entry(bus_cur, &gbuses, bus_list) {
 		if (flag)
-			*prev = list_entry (tmp_prev, struct bus_node, bus_list);
+			*prev = list_prev_entry(bus_cur, bus_list);
 		if (bus_cur->busno == bus_number)
 			return bus_cur;
 	}
@@ -1788,7 +1776,6 @@ void ibmphp_print_test (void)
 	struct bus_node *bus_cur = NULL;
 	struct range_node *range;
 	struct resource_node *res;
-	struct list_head *tmp;
 
 	debug_pci ("*****************START**********************\n");
 
@@ -1797,8 +1784,7 @@ void ibmphp_print_test (void)
 		return;
 	}
 
-	list_for_each (tmp, &gbuses) {
-		bus_cur = list_entry (tmp, struct bus_node, bus_list);
+	list_for_each_entry(bus_cur, &gbuses, bus_list) {
 		debug_pci ("This is bus # %d.  There are\n", bus_cur->busno);
 		debug_pci ("IORanges = %d\t", bus_cur->noIORanges);
 		debug_pci ("MemRanges = %d\t", bus_cur->noMemRanges);

diff --git a/drivers/pci/hotplug/pci_hotplug_core.c b/drivers/pci/hotplug/pci_hotplug_core.c
@@ -396,10 +396,8 @@ static void fs_remove_slot(struct pci_slot *pci_slot)
 static struct hotplug_slot *get_slot_from_name(const char *name)
 {
 	struct hotplug_slot *slot;
-	struct list_head *tmp;
 
-	list_for_each(tmp, &pci_hotplug_slot_list) {
-		slot = list_entry(tmp, struct hotplug_slot, slot_list);
+	list_for_each_entry(slot, &pci_hotplug_slot_list, slot_list) {
 		if (strcmp(hotplug_slot_name(slot), name) == 0)
 			return slot;
 	}

diff --git a/drivers/pci/hotplug/pcihp_skeleton.c b/drivers/pci/hotplug/pcihp_skeleton.c
@@ -321,17 +321,14 @@ static int __init init_slots(void)
 
 static void __exit cleanup_slots(void)
 {
-	struct list_head *tmp;
-	struct list_head *next;
-	struct slot *slot;
+	struct slot *slot, *next;
 
 	/*
 	 * Unregister all of our slots with the pci_hotplug subsystem.
 	 * Memory will be freed in release_slot() callback after slot's
 	 * lifespan is finished.
 	 */
-	list_for_each_safe(tmp, next, &slot_list) {
-		slot = list_entry(tmp, struct slot, slot_list);
+	list_for_each_entry_safe(slot, next, &slot_list, slot_list) {
 		list_del(&slot->slot_list);
 		pci_hp_deregister(slot->hotplug_slot);
 	}

diff --git a/drivers/pci/hotplug/rpadlpar_core.c b/drivers/pci/hotplug/rpadlpar_core.c
@@ -114,11 +114,10 @@ static struct device_node *find_dlpar_node(char *drc_name, int *node_type)
  */
 static struct slot *find_php_slot(struct device_node *dn)
 {
-	struct list_head *tmp, *n;
-	struct slot *slot;
+	struct slot *slot, *next;
 
-	list_for_each_safe(tmp, n, &rpaphp_slot_head) {
-		slot = list_entry(tmp, struct slot, rpaphp_slot_list);
+	list_for_each_entry_safe(slot, next, &rpaphp_slot_head,
+				 rpaphp_slot_list) {
 		if (slot->dn == dn)
 			return slot;
 	}

diff --git a/drivers/pci/hotplug/rpaphp_core.c b/drivers/pci/hotplug/rpaphp_core.c
@@ -356,17 +356,16 @@ EXPORT_SYMBOL_GPL(rpaphp_add_slot);
 
 static void __exit cleanup_slots(void)
 {
-	struct list_head *tmp, *n;
-	struct slot *slot;
+	struct slot *slot, *next;
 
 	/*
 	 * Unregister all of our slots with the pci_hotplug subsystem,
 	 * and free up all memory that we had allocated.
 	 * memory will be freed in release_slot callback.
 	 */
 
-	list_for_each_safe(tmp, n, &rpaphp_slot_head) {
-		slot = list_entry(tmp, struct slot, rpaphp_slot_list);
+	list_for_each_entry_safe(slot, next, &rpaphp_slot_head,
+				 rpaphp_slot_list) {
 		list_del(&slot->rpaphp_slot_list);
 		pci_hp_deregister(slot->hotplug_slot);
 	}

diff --git a/drivers/pci/hotplug/s390_pci_hpc.c b/drivers/pci/hotplug/s390_pci_hpc.c
@@ -201,11 +201,10 @@ int zpci_init_slot(struct zpci_dev *zdev)
 
 void zpci_exit_slot(struct zpci_dev *zdev)
 {
-	struct list_head *tmp, *n;
-	struct slot *slot;
+	struct slot *slot, *next;
 
-	list_for_each_safe(tmp, n, &s390_hotplug_slot_list) {
-		slot = list_entry(tmp, struct slot, slot_list);
+	list_for_each_entry_safe(slot, next, &s390_hotplug_slot_list,
+				 slot_list) {
 		if (slot->zdev != zdev)
 			continue;
 		list_del(&slot->slot_list);

diff --git a/drivers/pci/hotplug/shpchp_core.c b/drivers/pci/hotplug/shpchp_core.c
@@ -178,12 +178,9 @@ static int init_slots(struct controller *ctrl)
 
 void cleanup_slots(struct controller *ctrl)
 {
-	struct list_head *tmp;
-	struct list_head *next;
-	struct slot *slot;
+	struct slot *slot, *next;
 
-	list_for_each_safe(tmp, next, &ctrl->slot_list) {
-		slot = list_entry(tmp, struct slot, slot_list);
+	list_for_each_entry_safe(slot, next, &ctrl->slot_list, slot_list) {
 		list_del(&slot->slot_list);
 		cancel_delayed_work(&slot->work);
 		destroy_workqueue(slot->wq);