[PATCH] Compaq PCI Hotplug: kill useless kmalloc casts

This patch removes the cast of kmalloc's results to the target pointer type.
Also it fixes kmalloc to use sizeof(*foo) instead of sizeof(type_of_foo) as
suggested by Matthew Wilcox. Also removes a few useless checks if a pointer
is NULL before calling kfree: kfree checks this itself.

drivers/pci/hotplug/cpqphp_ctrl.c

@@ -454,7 +454,7 @@ static struct pci_resource *do_pre_bridge_resource_split(struct pci_resource **h
 	if (node->length & (alignment -1)) {
 		/* this one isn't an aligned length, so we'll make a new entry
 		 * and split it up. */
-		split_node = kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
+		split_node = kmalloc(sizeof(*split_node), GFP_KERNEL);
 
 		if (!split_node)
 			return NULL;
@@ -582,7 +582,7 @@ static struct pci_resource *get_io_resource(struct pci_resource **head, u32 size
 			if ((node->length - (temp_dword - node->base)) < size)
 				continue;
 
-			split_node = (struct pci_resource*) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
+			split_node = kmalloc(sizeof(*split_node), GFP_KERNEL);
 
 			if (!split_node)
 				return NULL;
@@ -601,7 +601,7 @@ static struct pci_resource *get_io_resource(struct pci_resource **head, u32 size
 		if (node->length > size) {
 			/* this one is longer than we need
 			 * so we'll make a new entry and split it up */
-			split_node = (struct pci_resource*) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
+			split_node = kmalloc(sizeof(*split_node), GFP_KERNEL);
 
 			if (!split_node)
 				return NULL;
@@ -678,7 +678,7 @@ static struct pci_resource *get_max_resource(struct pci_resource **head, u32 siz
 			if ((max->length - (temp_dword - max->base)) < size)
 				continue;
 
-			split_node = (struct pci_resource*) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
+			split_node = kmalloc(sizeof(*split_node), GFP_KERNEL);
 
 			if (!split_node)
 				return NULL;
@@ -695,7 +695,7 @@ static struct pci_resource *get_max_resource(struct pci_resource **head, u32 siz
 		if ((max->base + max->length) & (size - 1)) {
 			/* this one isn't end aligned properly at the top
 			 * so we'll make a new entry and split it up */
-			split_node = kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
+			split_node = kmalloc(sizeof(*split_node), GFP_KERNEL);
 
 			if (!split_node)
 				return NULL;
@@ -776,7 +776,7 @@ static struct pci_resource *get_resource(struct pci_resource **head, u32 size)
 			if ((node->length - (temp_dword - node->base)) < size)
 				continue;
 
-			split_node = (struct pci_resource*) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
+			split_node = kmalloc(sizeof(*split_node), GFP_KERNEL);
 
 			if (!split_node)
 				return NULL;
@@ -795,7 +795,7 @@ static struct pci_resource *get_resource(struct pci_resource **head, u32 size)
 			dbg("%s: too big\n", __FUNCTION__);
 			/* this one is longer than we need
 			 * so we'll make a new entry and split it up */
-			split_node = (struct pci_resource*) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
+			split_node = kmalloc(sizeof(*split_node), GFP_KERNEL);
 
 			if (!split_node)
 				return NULL;
@@ -985,7 +985,7 @@ struct pci_func *cpqhp_slot_create(u8 busnumber)
 	struct pci_func *new_slot;
 	struct pci_func *next;
 
-	new_slot = (struct pci_func *) kmalloc(sizeof(struct pci_func), GFP_KERNEL);
+	new_slot = kmalloc(sizeof(*new_slot), GFP_KERNEL);
 
 	if (new_slot == NULL) {
 		/* I'm not dead yet!
@@ -1870,7 +1870,7 @@ static int update_slot_info(struct controller *ctrl, struct slot *slot)
 	struct hotplug_slot_info *info;
 	int result;
 
-	info = kmalloc (sizeof (struct hotplug_slot_info), GFP_KERNEL);
+	info = kmalloc(sizeof(*info), GFP_KERNEL);
 	if (!info)
 		return -ENOMEM;
 
@@ -2361,7 +2361,7 @@ int cpqhp_hardware_test(struct controller *ctrl, int test_num)
  * Returns 0 if success
  *
  */
-static u32 configure_new_device(struct controller *ctrl, struct pci_func *func,
+static u32 configure_new_device(struct controller * ctrl, struct pci_func * func,
 				 u8 behind_bridge, struct resource_lists * resources)
 {
 	u8 temp_byte, function, max_functions, stop_it;
@@ -2590,20 +2590,16 @@ static int configure_new_function(struct controller *ctrl, struct pci_func *func
 
 		/* Make copies of the nodes we are going to pass down so that
 		 * if there is a problem,we can just use these to free resources */
-		hold_bus_node = (struct pci_resource *) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
-		hold_IO_node = (struct pci_resource *) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
-		hold_mem_node = (struct pci_resource *) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
-		hold_p_mem_node = (struct pci_resource *) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
+		hold_bus_node = kmalloc(sizeof(*hold_bus_node), GFP_KERNEL);
+		hold_IO_node = kmalloc(sizeof(*hold_IO_node), GFP_KERNEL);
+		hold_mem_node = kmalloc(sizeof(*hold_mem_node), GFP_KERNEL);
+		hold_p_mem_node = kmalloc(sizeof(*hold_p_mem_node), GFP_KERNEL);
 
 		if (!hold_bus_node || !hold_IO_node || !hold_mem_node || !hold_p_mem_node) {
-			if (hold_bus_node)
-				kfree(hold_bus_node);
-			if (hold_IO_node)
-				kfree(hold_IO_node);
-			if (hold_mem_node)
-				kfree(hold_mem_node);
-			if (hold_p_mem_node)
-				kfree(hold_p_mem_node);
+			kfree(hold_bus_node);
+			kfree(hold_IO_node);
+			kfree(hold_mem_node);
+			kfree(hold_p_mem_node);
 
 			return 1;
 		}