PCMCIA: soc_common: provide single socket add/remove functionality

Factor out the functionality for adding and removing a single
socket, thereby allowing SoCs to individually register each
socket.  The advantage of this approach is that SoCs can then
extend soc_pcmcia_socket as they wish.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>

drivers/pcmcia/soc_common.c

@@ -574,7 +574,7 @@ void soc_pcmcia_enable_irqs(struct soc_pcmcia_socket *skt,
 EXPORT_SYMBOL(soc_pcmcia_enable_irqs);
 
 
-LIST_HEAD(soc_pcmcia_sockets);
+static LIST_HEAD(soc_pcmcia_sockets);
 static DEFINE_MUTEX(soc_pcmcia_sockets_lock);
 
 #ifdef CONFIG_CPU_FREQ
@@ -619,32 +619,40 @@ module_exit(soc_pcmcia_cpufreq_unregister);
 
 #endif
 
-int soc_common_drv_pcmcia_probe(struct device *dev, struct pcmcia_low_level *ops,
-				struct skt_dev_info *sinfo)
+void soc_pcmcia_remove_one(struct soc_pcmcia_socket *skt)
 {
-	struct soc_pcmcia_socket *skt;
-	int ret, i;
-
 	mutex_lock(&soc_pcmcia_sockets_lock);
+	del_timer_sync(&skt->poll_timer);
 
-	/*
-	 * Initialise the per-socket structure.
-	 */
-	for (i = 0; i < sinfo->nskt; i++) {
-		skt = &sinfo->skt[i];
+	pcmcia_unregister_socket(&skt->socket);
 
-		skt->socket.ops = &soc_common_pcmcia_operations;
-		skt->socket.owner = ops->owner;
-		skt->socket.dev.parent = dev;
+	flush_scheduled_work();
+
+	skt->ops->hw_shutdown(skt);
+
+	soc_common_pcmcia_config_skt(skt, &dead_socket);
+
+	list_del(&skt->node);
+	mutex_unlock(&soc_pcmcia_sockets_lock);
+
+	iounmap(skt->virt_io);
+	skt->virt_io = NULL;
+	release_resource(&skt->res_attr);
+	release_resource(&skt->res_mem);
+	release_resource(&skt->res_io);
+	release_resource(&skt->res_skt);
+}
+EXPORT_SYMBOL(soc_pcmcia_remove_one);
+
+int soc_pcmcia_add_one(struct soc_pcmcia_socket *skt)
+{
+	int ret;
 
 	init_timer(&skt->poll_timer);
 	skt->poll_timer.function = soc_common_pcmcia_poll_event;
 	skt->poll_timer.data = (unsigned long)skt;
 	skt->poll_timer.expires = jiffies + SOC_PCMCIA_POLL_PERIOD;
 
-		skt->dev	= dev;
-		skt->ops	= ops;
-
 	ret = request_resource(&iomem_resource, &skt->res_skt);
 	if (ret)
 		goto out_err_1;
@@ -667,6 +675,8 @@ int soc_common_drv_pcmcia_probe(struct device *dev, struct pcmcia_low_level *ops
 		goto out_err_5;
 	}
 
+	mutex_lock(&soc_pcmcia_sockets_lock);
+
 	list_add(&skt->node, &soc_pcmcia_sockets);
 
 	/*
@@ -674,12 +684,13 @@ int soc_common_drv_pcmcia_probe(struct device *dev, struct pcmcia_low_level *ops
 	 * we are not guaranteed to see a SetIOMap operation at
 	 * runtime.
 	 */
-		ops->set_timing(skt);
+	skt->ops->set_timing(skt);
 
-		ret = ops->hw_init(skt);
+	ret = skt->ops->hw_init(skt);
 	if (ret)
 		goto out_err_6;
 
+	skt->socket.ops = &soc_common_pcmcia_operations;
 	skt->socket.features = SS_CAP_STATIC_MAP|SS_CAP_PCCARD;
 	skt->socket.resource_ops = &pccard_static_ops;
 	skt->socket.irq_mask = 0;
@@ -693,33 +704,28 @@ int soc_common_drv_pcmcia_probe(struct device *dev, struct pcmcia_low_level *ops
 	if (ret)
 		goto out_err_7;
 
-		WARN_ON(skt->socket.sock != i);
-
 	add_timer(&skt->poll_timer);
 
+	mutex_unlock(&soc_pcmcia_sockets_lock);
+
 	ret = device_create_file(&skt->socket.dev, &dev_attr_status);
 	if (ret)
 		goto out_err_8;
-	}
 
-	dev_set_drvdata(dev, sinfo);
-	ret = 0;
-	goto out;
-
-	do {
-		skt = &sinfo->skt[i];
+	return ret;
 
-		device_remove_file(&skt->socket.dev, &dev_attr_status);
  out_err_8:
+	mutex_lock(&soc_pcmcia_sockets_lock);
 	del_timer_sync(&skt->poll_timer);
 	pcmcia_unregister_socket(&skt->socket);
 
  out_err_7:
 	flush_scheduled_work();
 
-		ops->hw_shutdown(skt);
+	skt->ops->hw_shutdown(skt);
  out_err_6:
 	list_del(&skt->node);
+	mutex_unlock(&soc_pcmcia_sockets_lock);
 	iounmap(skt->virt_io);
  out_err_5:
 	release_resource(&skt->res_attr);
@@ -730,13 +736,44 @@ int soc_common_drv_pcmcia_probe(struct device *dev, struct pcmcia_low_level *ops
  out_err_2:
 	release_resource(&skt->res_skt);
  out_err_1:
-		i--;
-	} while (i > 0);
 
+	return ret;
+}
+EXPORT_SYMBOL(soc_pcmcia_add_one);
+
+int soc_common_drv_pcmcia_probe(struct device *dev, struct pcmcia_low_level *ops,
+				struct skt_dev_info *sinfo)
+{
+	struct soc_pcmcia_socket *skt;
+	int ret, i;
+
+	/*
+	 * Initialise the per-socket structure.
+	 */
+	for (i = ret = 0; i < sinfo->nskt; i++) {
+		skt = &sinfo->skt[i];
+
+		skt->socket.owner = ops->owner;
+		skt->socket.dev.parent = dev;
+
+		skt->dev	= dev;
+		skt->ops	= ops;
+
+		ret = soc_pcmcia_add_one(skt);
+		if (ret)
+			break;
+
+		WARN_ON(skt->socket.sock != i);
+	}
+
+	if (ret) {
+		while (--i >= 0)
+			soc_pcmcia_remove_one(&sinfo->skt[i]);
 		kfree(sinfo);
+	} else {
+		dev_set_drvdata(dev, sinfo);
+	}
 
- out:
-	mutex_unlock(&soc_pcmcia_sockets_lock);
 	return ret;
 }
 EXPORT_SYMBOL(soc_common_drv_pcmcia_probe);
@@ -748,29 +785,8 @@ int soc_common_drv_pcmcia_remove(struct device *dev)
 
 	dev_set_drvdata(dev, NULL);
 
-	mutex_lock(&soc_pcmcia_sockets_lock);
-	for (i = 0; i < sinfo->nskt; i++) {
-		struct soc_pcmcia_socket *skt = &sinfo->skt[i];
-
-		del_timer_sync(&skt->poll_timer);
-
-		pcmcia_unregister_socket(&skt->socket);
-
-		flush_scheduled_work();
-
-		skt->ops->hw_shutdown(skt);
-
-		soc_common_pcmcia_config_skt(skt, &dead_socket);
-
-		list_del(&skt->node);
-		iounmap(skt->virt_io);
-		skt->virt_io = NULL;
-		release_resource(&skt->res_attr);
-		release_resource(&skt->res_mem);
-		release_resource(&skt->res_io);
-		release_resource(&skt->res_skt);
-	}
-	mutex_unlock(&soc_pcmcia_sockets_lock);
+	for (i = 0; i < sinfo->nskt; i++)
+		soc_pcmcia_remove_one(&sinfo->skt[i]);
 
 	kfree(sinfo);
 

drivers/pcmcia/soc_common.h

@@ -135,7 +135,8 @@ extern void soc_pcmcia_enable_irqs(struct soc_pcmcia_socket *skt, struct pcmcia_
 extern void soc_common_pcmcia_get_timing(struct soc_pcmcia_socket *, struct soc_pcmcia_timing *);
 
 
-extern struct list_head soc_pcmcia_sockets;
+void soc_pcmcia_remove_one(struct soc_pcmcia_socket *skt);
+int soc_pcmcia_add_one(struct soc_pcmcia_socket *skt);
 
 extern int soc_common_drv_pcmcia_probe(struct device *dev, struct pcmcia_low_level *ops, struct skt_dev_info *sinfo);
 extern int soc_common_drv_pcmcia_remove(struct device *dev);