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path: root/drivers/char/ds1620.c
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Diffstat (limited to 'drivers/char/ds1620.c')
-rw-r--r--drivers/char/ds1620.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/char/ds1620.c b/drivers/char/ds1620.c
index 334ad5bbe6b6..34275c6f1da2 100644
--- a/drivers/char/ds1620.c
+++ b/drivers/char/ds1620.c
@@ -8,6 +8,7 @@
8#include <linux/proc_fs.h> 8#include <linux/proc_fs.h>
9#include <linux/capability.h> 9#include <linux/capability.h>
10#include <linux/init.h> 10#include <linux/init.h>
11#include <linux/smp_lock.h>
11 12
12#include <asm/hardware.h> 13#include <asm/hardware.h>
13#include <asm/mach-types.h> 14#include <asm/mach-types.h>
@@ -208,6 +209,12 @@ static void ds1620_read_state(struct therm *therm)
208 therm->hi = cvt_9_to_int(ds1620_in(THERM_READ_TH, 9)); 209 therm->hi = cvt_9_to_int(ds1620_in(THERM_READ_TH, 9));
209} 210}
210 211
212static int ds1620_open(struct inode *inode, struct file *file)
213{
214 cycle_kernel_lock();
215 return nonseekable_open(inode, file);
216}
217
211static ssize_t 218static ssize_t
212ds1620_read(struct file *file, char __user *buf, size_t count, loff_t *ptr) 219ds1620_read(struct file *file, char __user *buf, size_t count, loff_t *ptr)
213{ 220{
@@ -336,7 +343,7 @@ static struct proc_dir_entry *proc_therm_ds1620;
336 343
337static const struct file_operations ds1620_fops = { 344static const struct file_operations ds1620_fops = {
338 .owner = THIS_MODULE, 345 .owner = THIS_MODULE,
339 .open = nonseekable_open, 346 .open = ds1620_open,
340 .read = ds1620_read, 347 .read = ds1620_read,
341 .ioctl = ds1620_ioctl, 348 .ioctl = ds1620_ioctl,
342}; 349};