patch-2.4.0-test4 linux/drivers/sound/cmpci.c

• Lines: 100
• Date: Wed Jul 12 21:58:43 2000
• Orig file: v2.4.0-test3/linux/drivers/sound/cmpci.c
• Orig date: Mon Jul 10 16:47:24 2000

diff -u --recursive --new-file v2.4.0-test3/linux/drivers/sound/cmpci.c linux/drivers/sound/cmpci.c
@@ -114,6 +114,7 @@
 #include <linux/init.h>
 #include <linux/poll.h>
 #include <linux/spinlock.h>
+#include <linux/smp_lock.h>
 #include <asm/uaccess.h>
 #include <asm/hardirq.h>
 
@@ -1397,29 +1398,35 @@
 {
 	struct cm_state *s = (struct cm_state *)file->private_data;
 	struct dmabuf *db;
-	int ret;
+	int ret = -EINVAL;
 	unsigned long size;
 
 	VALIDATE_STATE(s);
+	lock_kernel();
 	if (vma->vm_flags & VM_WRITE) {
 		if ((ret = prog_dmabuf(s, 1)) != 0)
-			return ret;
+			goto out;
 		db = &s->dma_dac;
 	} else if (vma->vm_flags & VM_READ) {
 		if ((ret = prog_dmabuf(s, 0)) != 0)
-			return ret;
+			goto out;
 		db = &s->dma_adc;
 	} else 
-		return -EINVAL;
+		goto out;
+	ret = -EINVAL;
 	if (vma->vm_pgoff != 0)
-		return -EINVAL;
+		goto out;
 	size = vma->vm_end - vma->vm_start;
 	if (size > (PAGE_SIZE << db->buforder))
-		return -EINVAL;
+		goto out;
+	ret = -EAGAIN;
 	if (remap_page_range(vma->vm_start, virt_to_phys(db->rawbuf), size, vma->vm_page_prot))
-		return -EAGAIN;
+		goto out;
 	db->mapped = 1;
-	return 0;
+	ret = 0;
+out:
+	unlock_kernel();
+	return ret;
 }
 
 static int cm_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
@@ -1771,6 +1778,7 @@
 	struct cm_state *s = (struct cm_state *)file->private_data;
 
 	VALIDATE_STATE(s);
+	lock_kernel();
 	if (file->f_mode & FMODE_WRITE)
 		drain_dac(s, file->f_flags & O_NONBLOCK);
 	down(&s->open_sem);
@@ -1785,6 +1793,7 @@
 	s->open_mode &= (~file->f_mode) & (FMODE_READ|FMODE_WRITE);
 	up(&s->open_sem);
 	wake_up(&s->open_wait);
+	unlock_kernel();
 	return 0;
 }
 
@@ -2021,6 +2030,7 @@
 
 	VALIDATE_STATE(s);
 
+	lock_kernel();
 	if (file->f_mode & FMODE_WRITE) {
 		__set_current_state(TASK_INTERRUPTIBLE);
 		add_wait_queue(&s->midi.owait, &wait);
@@ -2058,6 +2068,7 @@
 	spin_unlock_irqrestore(&s->lock, flags);
 	up(&s->open_sem);
 	wake_up(&s->open_wait);
+	unlock_kernel();
 	return 0;
 }
 
@@ -2212,6 +2223,7 @@
 	unsigned int regb;
 
 	VALIDATE_STATE(s);
+	lock_kernel();
 	down(&s->open_sem);
 	s->open_mode &= ~FMODE_DMFM;
 	for (regb = 0xb0; regb < 0xb9; regb++) {
@@ -2222,6 +2234,7 @@
 	}
 	up(&s->open_sem);
 	wake_up(&s->open_wait);
+	unlock_kernel();
 	return 0;
 }