Sep 27 2014

staging: dgnc: dgnc_mgmt.c: Replace non-standard spinlock’s macros 

Author: Roberta Dobrescu <roberta.dobrescu@gmail.com>

This patch replaces non-standard spinlock's macros.
It is done using coccinelle and the following semantic patch:

@@
expression x;
@@

- DGNC_SPINLOCK_INIT(x)
+ spin_lock_init(&x)

@@
expression x, y;
@@

- DGNC_LOCK(x, y)
+ spin_lock_irqsave(&x, y)

@@
expression x, y;
@@

- DGNC_UNLOCK(x, y)
+ spin_unlock_irqrestore(&x, y)

@used_by_lock exists@
typedef ulong;
symbol lock_flags;
position p1, p2;
@@

(
 ulong lock_flags@p1;
|
 unsigned long lock_flags@p2;
)
...
(
 spin_lock_irqsave(..., lock_flags)
|
 spin_unlock_irqrestore(..., lock_flags)
)

@@
position used_by_lock.p1, used_by_lock.p2;
@@

(
- ulong lock_flags@p1;
+ unsigned long flags;
|
- unsigned long lock_flags@p2;
+ unsigned long flags;
)
<...
- lock_flags
+ flags
...>

Signed-off-by: Roberta Dobrescu 
Signed-off-by: Greg Kroah-Hartman 

---
 drivers/staging/dgnc/dgnc_mgmt.c | 30 +++++++++++++++---------------
 1 file changed, 15 insertions(+), 15 deletions(-)
 
diff --git a/drivers/staging/dgnc/dgnc_mgmt.c b/drivers/staging/dgnc/dgnc_mgmt.c
index 31e9f45..9e45b85 100644
--- a/drivers/staging/dgnc/dgnc_mgmt.c
+++ b/drivers/staging/dgnc/dgnc_mgmt.c
@@ -62,25 +62,25 @@ static int dgnc_mgmt_in_use[MAXMGMTDEVICES];
  */
 int dgnc_mgmt_open(struct inode *inode, struct file *file)
 {
-	unsigned long lock_flags;
+	unsigned long flags;
 	unsigned int minor = iminor(inode);
 
-	DGNC_LOCK(dgnc_global_lock, lock_flags);
+	spin_lock_irqsave(&dgnc_global_lock, flags);
 
 	/* mgmt device */
 	if (minor < MAXMGMTDEVICES) {
 		/* Only allow 1 open at a time on mgmt device */
 		if (dgnc_mgmt_in_use[minor]) {
-			DGNC_UNLOCK(dgnc_global_lock, lock_flags);
+			spin_unlock_irqrestore(&dgnc_global_lock, flags);
 			return -EBUSY;
 		}
 		dgnc_mgmt_in_use[minor]++;
 	} else {
-		DGNC_UNLOCK(dgnc_global_lock, lock_flags);
+		spin_unlock_irqrestore(&dgnc_global_lock, flags);
 		return -ENXIO;
 	}
 
-	DGNC_UNLOCK(dgnc_global_lock, lock_flags);
+	spin_unlock_irqrestore(&dgnc_global_lock, flags);
 
 	return 0;
 }
@@ -93,17 +93,17 @@ int dgnc_mgmt_open(struct inode *inode, struct file *file)
  */
 int dgnc_mgmt_close(struct inode *inode, struct file *file)
 {
-	unsigned long lock_flags;
+	unsigned long flags;
 	unsigned int minor = iminor(inode);
 
-	DGNC_LOCK(dgnc_global_lock, lock_flags);
+	spin_lock_irqsave(&dgnc_global_lock, flags);
 
 	/* mgmt device */
 	if (minor < MAXMGMTDEVICES) {
 		if (dgnc_mgmt_in_use[minor])
 			dgnc_mgmt_in_use[minor] = 0;
 	}
-	DGNC_UNLOCK(dgnc_global_lock, lock_flags);
+	spin_unlock_irqrestore(&dgnc_global_lock, flags);
 
 	return 0;
 }
@@ -117,7 +117,7 @@ int dgnc_mgmt_close(struct inode *inode, struct file *file)
 
 long dgnc_mgmt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 {
-	unsigned long lock_flags;
+	unsigned long flags;
 	void __user *uarg = (void __user *) arg;
 
 	switch (cmd) {
@@ -131,12 +131,12 @@ long dgnc_mgmt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 		 */
 		struct digi_dinfo ddi;
 
-		DGNC_LOCK(dgnc_global_lock, lock_flags);
+		spin_lock_irqsave(&dgnc_global_lock, flags);
 
 		ddi.dinfo_nboards = dgnc_NumBoards;
 		sprintf(ddi.dinfo_version, "%s", DG_PART);
 
-		DGNC_UNLOCK(dgnc_global_lock, lock_flags);
+		spin_unlock_irqrestore(&dgnc_global_lock, flags);
 
 		if (copy_to_user(uarg, &ddi, sizeof(ddi)))
 			return -EFAULT;
@@ -161,7 +161,7 @@ long dgnc_mgmt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 
 		di.info_bdnum = brd;
 
-		DGNC_LOCK(dgnc_Board[brd]->bd_lock, lock_flags);
+		spin_lock_irqsave(&dgnc_Board[brd]->bd_lock, flags);
 
 		di.info_bdtype = dgnc_Board[brd]->dpatype;
 		di.info_bdstate = dgnc_Board[brd]->dpastatus;
@@ -173,7 +173,7 @@ long dgnc_mgmt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 		else
 			di.info_nports = 0;
 
-		DGNC_UNLOCK(dgnc_Board[brd]->bd_lock, lock_flags);
+		spin_unlock_irqrestore(&dgnc_Board[brd]->bd_lock, flags);
 
 		if (copy_to_user(uarg, &di, sizeof(di)))
 			return -EFAULT;
@@ -212,7 +212,7 @@ long dgnc_mgmt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 		ni.board = board;
 		ni.channel = channel;
 
-		DGNC_LOCK(ch->ch_lock, lock_flags);
+		spin_lock_irqsave(&ch->ch_lock, flags);
 
 		mstat = (ch->ch_mostat | ch->ch_mistat);
 
@@ -266,7 +266,7 @@ long dgnc_mgmt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 
 		ni.baud = ch->ch_old_baud;
 
-		DGNC_UNLOCK(ch->ch_lock, lock_flags);
+		spin_unlock_irqrestore(&ch->ch_lock, flags);
 
 		if (copy_to_user(uarg, &ni, sizeof(ni)))
 			return -EFAULT;

qlambert