[PATCH] pcmcia: embed dev_link_t into struct pcmcia_device

Embed dev_link_t into struct pcmcia_device(), as they basically address the
same entity. The actual contents of dev_link_t will be cleaned up step by step.
This patch includes a bugfix from and signed-off-by Andrew Morton.

Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>

3 files changed, 35 insertions, 44 deletions

diff --git a/drivers/char/pcmcia/cm4000_cs.c b/drivers/char/pcmcia/cm4000_cs.c
index c996ae1375b..3e6d6e0bb6e 100644
--- a/drivers/char/pcmcia/cm4000_cs.c
+++ b/drivers/char/pcmcia/cm4000_cs.c
@@ -46,7 +46,7 @@
 /* #define ATR_CSUM */
 
 #ifdef PCMCIA_DEBUG
-#define reader_to_dev(x)	(&handle_to_dev(x->link.handle))
+#define reader_to_dev(x)	(&handle_to_dev(x->p_dev->handle))
 static int pc_debug = PCMCIA_DEBUG;
 module_param(pc_debug, int, 0600);
 #define DEBUGP(n, rdr, x, args...) do { 				\
@@ -106,7 +106,7 @@ static int major;		/* major number we get from the kernel */
 #define REG_STOPBITS(x)		(x + 7)
 
 struct cm4000_dev {
-	dev_link_t link;		/* pcmcia link */
+	struct pcmcia_device *p_dev;
 	dev_node_t node;		/* OS node (major,minor) */
 
 	unsigned char atr[MAX_ATR];
@@ -454,7 +454,7 @@ static struct card_fixup card_fixups[] = {
 static void set_cardparameter(struct cm4000_dev *dev)
 {
 	int i;
-	ioaddr_t iobase = dev->link.io.BasePort1;
+	ioaddr_t iobase = dev->p_dev->io.BasePort1;
 	u_int8_t stopbits = 0x02; /* ISO default */
 
 	DEBUGP(3, dev, "-> set_cardparameter\n");
@@ -487,7 +487,7 @@ static int set_protocol(struct cm4000_dev *dev, struct ptsreq *ptsreq)
 	unsigned short num_bytes_read;
 	unsigned char pts_reply[4];
 	ssize_t rc;
-	ioaddr_t iobase = dev->link.io.BasePort1;
+	ioaddr_t iobase = dev->p_dev->io.BasePort1;
 
 	rc = 0;
 
@@ -699,7 +699,7 @@ static void terminate_monitor(struct cm4000_dev *dev)
 static void monitor_card(unsigned long p)
 {
 	struct cm4000_dev *dev = (struct cm4000_dev *) p;
-	ioaddr_t iobase = dev->link.io.BasePort1;
+	ioaddr_t iobase = dev->p_dev->io.BasePort1;
 	unsigned short s;
 	struct ptsreq ptsreq;
 	int i, atrc;
@@ -962,7 +962,7 @@ static ssize_t cmm_read(struct file *filp, __user char *buf, size_t count,
 			loff_t *ppos)
 {
 	struct cm4000_dev *dev = filp->private_data;
-	ioaddr_t iobase = dev->link.io.BasePort1;
+	ioaddr_t iobase = dev->p_dev->io.BasePort1;
 	ssize_t rc;
 	int i, j, k;
 
@@ -971,7 +971,7 @@ static ssize_t cmm_read(struct file *filp, __user char *buf, size_t count,
 	if (count == 0)		/* according to manpage */
 		return 0;
 
-	if ((dev->link.state & DEV_PRESENT) == 0 ||	/* socket removed */
+	if ((dev->p_dev->state & DEV_PRESENT) == 0 ||	/* socket removed */
 	    test_bit(IS_CMM_ABSENT, &dev->flags))
 		return -ENODEV;
 
@@ -1083,7 +1083,7 @@ static ssize_t cmm_write(struct file *filp, const char __user *buf,
 			 size_t count, loff_t *ppos)
 {
 	struct cm4000_dev *dev = (struct cm4000_dev *) filp->private_data;
-	ioaddr_t iobase = dev->link.io.BasePort1;
+	ioaddr_t iobase = dev->p_dev->io.BasePort1;
 	unsigned short s;
 	unsigned char tmp;
 	unsigned char infolen;
@@ -1108,7 +1108,7 @@ static ssize_t cmm_write(struct file *filp, const char __user *buf,
 
 	sendT0 = dev->proto ? 0 : nr > 5 ? 0x08 : 0;
 
-	if ((dev->link.state & DEV_PRESENT) == 0 ||	/* socket removed */
+	if ((dev->p_dev->state & DEV_PRESENT) == 0 ||	/* socket removed */
 	    test_bit(IS_CMM_ABSENT, &dev->flags))
 		return -ENODEV;
 
@@ -1440,7 +1440,7 @@ static int cmm_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
 		     unsigned long arg)
 {
 	struct cm4000_dev *dev = filp->private_data;
-	ioaddr_t iobase = dev->link.io.BasePort1;
+	ioaddr_t iobase = dev->p_dev->io.BasePort1;
 	dev_link_t *link;
 	int size;
 	int rc;
@@ -1844,7 +1844,7 @@ static void cm4000_config(dev_link_t * link, int devno)
 	dev->node.major = major;
 	dev->node.minor = devno;
 	dev->node.next = NULL;
-	link->dev = &dev->node;
+	link->dev_node = &dev->node;
 	link->state &= ~DEV_CONFIG_PENDING;
 
 	return;
@@ -1889,8 +1889,8 @@ static void cm4000_release(dev_link_t *link)
 static int cm4000_attach(struct pcmcia_device *p_dev)
 {
 	struct cm4000_dev *dev;
-	dev_link_t *link;
 	int i;
+	dev_link_t *link = dev_to_instance(p_dev);
 
 	for (i = 0; i < CM4000_MAX_DEV; i++)
 		if (dev_table[i] == NULL)
@@ -1906,7 +1906,7 @@ static int cm4000_attach(struct pcmcia_device *p_dev)
 	if (dev == NULL)
 		return -ENOMEM;
 
-	link = &dev->link;
+	dev->p_dev = p_dev;
 	link->priv = dev;
 	link->conf.IntType = INT_MEMORY_AND_IO;
 	dev_table[i] = link;
@@ -1916,9 +1916,6 @@ static int cm4000_attach(struct pcmcia_device *p_dev)
 	init_waitqueue_head(&dev->atrq);
 	init_waitqueue_head(&dev->readq);
 
-	link->handle = p_dev;
-	p_dev->instance = link;
-
 	link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
 	cm4000_config(link, i);
 
diff --git a/drivers/char/pcmcia/cm4040_cs.c b/drivers/char/pcmcia/cm4040_cs.c
index 94ecd0342b7..97e32e7f84d 100644
--- a/drivers/char/pcmcia/cm4040_cs.c
+++ b/drivers/char/pcmcia/cm4040_cs.c
@@ -41,7 +41,7 @@
 
 
 #ifdef PCMCIA_DEBUG
-#define reader_to_dev(x)	(&handle_to_dev(x->link.handle))
+#define reader_to_dev(x)	(&handle_to_dev(x->p_dev->handle))
 static int pc_debug = PCMCIA_DEBUG;
 module_param(pc_debug, int, 0600);
 #define DEBUGP(n, rdr, x, args...) do { 				\
@@ -74,7 +74,7 @@ static struct class *cmx_class;
 #define		BS_WRITABLE	0x02
 
 struct reader_dev {
-	dev_link_t		link;
+	struct pcmcia_device	*p_dev;
 	dev_node_t		node;
 	wait_queue_head_t	devq;
 	wait_queue_head_t	poll_wait;
@@ -116,7 +116,7 @@ static inline unsigned char xinb(unsigned short port)
 static void cm4040_do_poll(unsigned long dummy)
 {
 	struct reader_dev *dev = (struct reader_dev *) dummy;
-	unsigned int obs = xinb(dev->link.io.BasePort1
+	unsigned int obs = xinb(dev->p_dev->io.BasePort1
 				+ REG_OFFSET_BUFFER_STATUS);
 
 	if ((obs & BSR_BULK_IN_FULL)) {
@@ -147,7 +147,7 @@ static void cm4040_stop_poll(struct reader_dev *dev)
 static int wait_for_bulk_out_ready(struct reader_dev *dev)
 {
 	int i, rc;
-	int iobase = dev->link.io.BasePort1;
+	int iobase = dev->p_dev->io.BasePort1;
 
 	for (i = 0; i < POLL_LOOP_COUNT; i++) {
 		if ((xinb(iobase + REG_OFFSET_BUFFER_STATUS)
@@ -177,7 +177,7 @@ static int wait_for_bulk_out_ready(struct reader_dev *dev)
 /* Write to Sync Control Register */
 static int write_sync_reg(unsigned char val, struct reader_dev *dev)
 {
-	int iobase = dev->link.io.BasePort1;
+	int iobase = dev->p_dev->io.BasePort1;
 	int rc;
 
 	rc = wait_for_bulk_out_ready(dev);
@@ -195,7 +195,7 @@ static int write_sync_reg(unsigned char val, struct reader_dev *dev)
 static int wait_for_bulk_in_ready(struct reader_dev *dev)
 {
 	int i, rc;
-	int iobase = dev->link.io.BasePort1;
+	int iobase = dev->p_dev->io.BasePort1;
 
 	for (i = 0; i < POLL_LOOP_COUNT; i++) {
 		if ((xinb(iobase + REG_OFFSET_BUFFER_STATUS)
@@ -225,7 +225,7 @@ static ssize_t cm4040_read(struct file *filp, char __user *buf,
 			size_t count, loff_t *ppos)
 {
 	struct reader_dev *dev = filp->private_data;
-	int iobase = dev->link.io.BasePort1;
+	int iobase = dev->p_dev->io.BasePort1;
 	size_t bytes_to_read;
 	unsigned long i;
 	size_t min_bytes_to_read;
@@ -246,7 +246,7 @@ static ssize_t cm4040_read(struct file *filp, char __user *buf,
 		return -EAGAIN;
 	}
 
-	if ((dev->link.state & DEV_PRESENT)==0)
+	if ((dev->p_dev->state & DEV_PRESENT)==0)
 		return -ENODEV;
 
 	for (i = 0; i < 5; i++) {
@@ -328,7 +328,7 @@ static ssize_t cm4040_write(struct file *filp, const char __user *buf,
 			 size_t count, loff_t *ppos)
 {
 	struct reader_dev *dev = filp->private_data;
-	int iobase = dev->link.io.BasePort1;
+	int iobase = dev->p_dev->io.BasePort1;
 	ssize_t rc;
 	int i;
 	unsigned int bytes_to_write;
@@ -351,7 +351,7 @@ static ssize_t cm4040_write(struct file *filp, const char __user *buf,
 		return -EAGAIN;
 	}
 
-	if ((dev->link.state & DEV_PRESENT) == 0)
+	if ((dev->p_dev->state & DEV_PRESENT) == 0)
 		return -ENODEV;
 
 	bytes_to_write = count;
@@ -606,7 +606,7 @@ static void reader_config(dev_link_t *link, int devno)
 	dev->node.major = major;
 	dev->node.minor = devno;
 	dev->node.next = NULL;
-	link->dev = &dev->node;
+	link->dev_node = &dev->node;
 	link->state &= ~DEV_CONFIG_PENDING;
 
 	DEBUGP(2, dev, "device " DEVICE_NAME "%d at 0x%.4x-0x%.4x\n", devno,
@@ -631,8 +631,8 @@ static void reader_release(dev_link_t *link)
 static int reader_attach(struct pcmcia_device *p_dev)
 {
 	struct reader_dev *dev;
-	dev_link_t *link;
 	int i;
+	dev_link_t *link = dev_to_instance(p_dev);
 
 	for (i = 0; i < CM_MAX_DEV; i++) {
 		if (dev_table[i] == NULL)
@@ -649,8 +649,8 @@ static int reader_attach(struct pcmcia_device *p_dev)
 	dev->timeout = CCID_DRIVER_MINIMUM_TIMEOUT;
 	dev->buffer_status = 0;
 
-	link = &dev->link;
 	link->priv = dev;
+	dev->p_dev = p_dev;
 
 	link->conf.IntType = INT_MEMORY_AND_IO;
 	dev_table[i] = link;
@@ -662,9 +662,6 @@ static int reader_attach(struct pcmcia_device *p_dev)
 	init_timer(&dev->poll_timer);
 	dev->poll_timer.function = &cm4040_do_poll;
 
-	link->handle = p_dev;
-	p_dev->instance = link;
-
 	link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
 	reader_config(link, i);
 
diff --git a/drivers/char/pcmcia/synclink_cs.c b/drivers/char/pcmcia/synclink_cs.c
index a6cbd323992..7b1e055184d 100644
--- a/drivers/char/pcmcia/synclink_cs.c
+++ b/drivers/char/pcmcia/synclink_cs.c
@@ -228,7 +228,7 @@ typedef struct _mgslpc_info {
 	struct	_input_signal_events	input_signal_events;
 
 	/* PCMCIA support */
-	dev_link_t	      link;
+	struct pcmcia_device	*p_dev;
 	dev_node_t	      node;
 	int		      stop;
 
@@ -536,11 +536,11 @@ static void ldisc_receive_buf(struct tty_struct *tty,
 static int mgslpc_attach(struct pcmcia_device *p_dev)
 {
     MGSLPC_INFO *info;
-    dev_link_t *link;
-    
+    dev_link_t *link = dev_to_instance(p_dev);
+
     if (debug_level >= DEBUG_LEVEL_INFO)
 	    printk("mgslpc_attach\n");
-	
+
     info = (MGSLPC_INFO *)kmalloc(sizeof(MGSLPC_INFO), GFP_KERNEL);
     if (!info) {
 	    printk("Error can't allocate device instance data\n");
@@ -565,22 +565,19 @@ static int mgslpc_attach(struct pcmcia_device *p_dev)
     info->imrb_value = 0xffff;
     info->pim_value = 0xff;
 
-    link = &info->link;
+    info->p_dev = p_dev;
     link->priv = info;
-    
+
     /* Initialize the dev_link_t structure */
 
     /* Interrupt setup */
     link->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
     link->irq.IRQInfo1   = IRQ_LEVEL_ID;
     link->irq.Handler = NULL;
-    
+
     link->conf.Attributes = 0;
     link->conf.IntType = INT_MEMORY_AND_IO;
 
-    link->handle = p_dev;
-    p_dev->instance = link;
-
     link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
     mgslpc_config(link);
 
@@ -673,7 +670,7 @@ static void mgslpc_config(dev_link_t *link)
     /* add to linked list of devices */
     sprintf(info->node.dev_name, "mgslpc0");
     info->node.major = info->node.minor = 0;
-    link->dev = &info->node;
+    link->dev_node = &info->node;
 
     printk(KERN_INFO "%s: index 0x%02x:",
 	   info->node.dev_name, link->conf.ConfigIndex);
@@ -1259,7 +1256,7 @@ static irqreturn_t mgslpc_isr(int irq, void *dev_id, struct pt_regs * regs)
 	if (!info)
 		return IRQ_NONE;
 		
-	if (!(info->link.state & DEV_CONFIG))
+	if (!(info->p_dev->state & DEV_CONFIG))
 		return IRQ_HANDLED;
 
 	spin_lock(&info->lock);