Patchwork Help needed, Re: [Bug #14334] pcmcia suspend regression from 2.6.31.1 to 2.6.31.2 - Dell Inspiron 600m

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Submitter Rafael Wysocki
Date Nov. 1, 2009, 8:36 a.m.
Message ID <200911010936.10409.rjw@sisk.pl>
Download mbox | patch
Permalink /patch/56828/
State RFC, archived
Headers show

Comments

Patch

Index: linux-2.6/drivers/pcmcia/yenta_socket.c
===================================================================
--- linux-2.6.orig/drivers/pcmcia/yenta_socket.c
+++ linux-2.6/drivers/pcmcia/yenta_socket.c
@@ -1275,16 +1275,26 @@  static int yenta_dev_resume_noirq(struct
 	if (socket->type && socket->type->restore_state)
 		socket->type->restore_state(socket);
 
-	return pcmcia_socket_dev_resume(dev);
+	pcmcia_socket_dev_early_resume(dev);
+	return 0;
+}
+
+static int yenta_dev_resume(struct device *dev)
+{
+	pcmcia_socket_dev_late_resume(dev);
+	return 0;
 }
 
 static struct dev_pm_ops yenta_pm_ops = {
 	.suspend_noirq = yenta_dev_suspend_noirq,
 	.resume_noirq = yenta_dev_resume_noirq,
+	.resume = yenta_dev_resume,
 	.freeze_noirq = yenta_dev_suspend_noirq,
 	.thaw_noirq = yenta_dev_resume_noirq,
+	.thaw = yenta_dev_resume,
 	.poweroff_noirq = yenta_dev_suspend_noirq,
 	.restore_noirq = yenta_dev_resume_noirq,
+	.restore = yenta_dev_resume,
 };
 
 #define YENTA_PM_OPS	(&yenta_pm_ops)
Index: linux-2.6/drivers/pcmcia/cs.c
===================================================================
--- linux-2.6.orig/drivers/pcmcia/cs.c
+++ linux-2.6/drivers/pcmcia/cs.c
@@ -98,10 +98,13 @@  EXPORT_SYMBOL(pcmcia_socket_list_rwsem);
  * These functions check for the appropriate struct pcmcia_soket arrays,
  * and pass them to the low-level functions pcmcia_{suspend,resume}_socket
  */
+static int socket_early_resume(struct pcmcia_socket *skt);
+static int socket_late_resume(struct pcmcia_socket *skt);
 static int socket_resume(struct pcmcia_socket *skt);
 static int socket_suspend(struct pcmcia_socket *skt);
 
-int pcmcia_socket_dev_suspend(struct device *dev)
+static void pcmcia_socket_dev_run(struct device *dev,
+				  int (*cb)(struct pcmcia_socket *))
 {
 	struct pcmcia_socket *socket;
 
@@ -110,29 +113,34 @@  int pcmcia_socket_dev_suspend(struct dev
 		if (socket->dev.parent != dev)
 			continue;
 		mutex_lock(&socket->skt_mutex);
-		socket_suspend(socket);
+		cb(socket);
 		mutex_unlock(&socket->skt_mutex);
 	}
 	up_read(&pcmcia_socket_list_rwsem);
+}
 
+int pcmcia_socket_dev_suspend(struct device *dev)
+{
+	pcmcia_socket_dev_run(dev, socket_suspend);
 	return 0;
 }
 EXPORT_SYMBOL(pcmcia_socket_dev_suspend);
 
-int pcmcia_socket_dev_resume(struct device *dev)
+void pcmcia_socket_dev_early_resume(struct device *dev)
 {
-	struct pcmcia_socket *socket;
+	pcmcia_socket_dev_run(dev, socket_early_resume);
+}
+EXPORT_SYMBOL(pcmcia_socket_dev_early_resume);
 
-	down_read(&pcmcia_socket_list_rwsem);
-	list_for_each_entry(socket, &pcmcia_socket_list, socket_list) {
-		if (socket->dev.parent != dev)
-			continue;
-		mutex_lock(&socket->skt_mutex);
-		socket_resume(socket);
-		mutex_unlock(&socket->skt_mutex);
-	}
-	up_read(&pcmcia_socket_list_rwsem);
+void pcmcia_socket_dev_late_resume(struct device *dev)
+{
+	pcmcia_socket_dev_run(dev, socket_late_resume);
+}
+EXPORT_SYMBOL(pcmcia_socket_dev_late_resume);
 
+int pcmcia_socket_dev_resume(struct device *dev)
+{
+	pcmcia_socket_dev_run(dev, socket_resume);
 	return 0;
 }
 EXPORT_SYMBOL(pcmcia_socket_dev_resume);
@@ -546,29 +554,34 @@  static int socket_suspend(struct pcmcia_
 	return 0;
 }
 
-/*
- * Resume a socket.  If a card is present, verify its CIS against
- * our cached copy.  If they are different, the card has been
- * replaced, and we need to tell the drivers.
- */
-static int socket_resume(struct pcmcia_socket *skt)
+static void socket_start_resume(struct pcmcia_socket *skt)
 {
-	int ret;
-
-	if (!(skt->state & SOCKET_SUSPEND))
-		return -EBUSY;
-
 	skt->socket = dead_socket;
 	skt->ops->init(skt);
 	skt->ops->set_socket(skt, &skt->socket);
+	if (skt->state & SOCKET_PRESENT)
+		skt->resume_status = socket_setup(skt, resume_delay);
+}
+
+static int socket_early_resume(struct pcmcia_socket *skt)
+{
+	if (skt->state & SOCKET_SUSPEND)
+		socket_start_resume(skt);
+
+	return 0;
+}
+
+static int socket_late_resume(struct pcmcia_socket *skt)
+{
+	if (!(skt->state & SOCKET_SUSPEND))
+		return 0;
 
 	if (!(skt->state & SOCKET_PRESENT)) {
 		skt->state &= ~SOCKET_SUSPEND;
 		return socket_insert(skt);
 	}
 
-	ret = socket_setup(skt, resume_delay);
-	if (ret == 0) {
+	if (skt->resume_status == 0) {
 		/*
 		 * FIXME: need a better check here for cardbus cards.
 		 */
@@ -596,6 +609,20 @@  static int socket_resume(struct pcmcia_s
 	return 0;
 }
 
+/*
+ * Resume a socket.  If a card is present, verify its CIS against
+ * our cached copy.  If they are different, the card has been
+ * replaced, and we need to tell the drivers.
+ */
+static int socket_resume(struct pcmcia_socket *skt)
+{
+	if (!(skt->state & SOCKET_SUSPEND))
+		return -EBUSY;
+
+	socket_start_resume(skt);
+	return socket_late_resume(skt);
+}
+
 static void socket_remove(struct pcmcia_socket *skt)
 {
 	dev_printk(KERN_NOTICE, &skt->dev,
Index: linux-2.6/include/pcmcia/ss.h
===================================================================
--- linux-2.6.orig/include/pcmcia/ss.h
+++ linux-2.6/include/pcmcia/ss.h
@@ -262,6 +262,8 @@  struct pcmcia_socket {
 	struct device			dev;
 	/* data internal to the socket driver */
 	void				*driver_data;
+	/* status of the card during resume from a system sleep state */
+	int				resume_status;
 };
 
 
@@ -280,6 +282,8 @@  extern struct pccard_resource_ops pccard
 
 /* socket drivers are expected to use these callbacks in their .drv struct */
 extern int pcmcia_socket_dev_suspend(struct device *dev);
+extern void pcmcia_socket_dev_early_resume(struct device *dev);
+extern void pcmcia_socket_dev_late_resume(struct device *dev);
 extern int pcmcia_socket_dev_resume(struct device *dev);
 
 /* socket drivers use this callback in their IRQ handler */