summaryrefslogtreecommitdiffstats
path: root/drivers/fpga/dfl-fme-main.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/fpga/dfl-fme-main.c')
-rw-r--r--drivers/fpga/dfl-fme-main.c19
1 files changed, 12 insertions, 7 deletions
diff --git a/drivers/fpga/dfl-fme-main.c b/drivers/fpga/dfl-fme-main.c
index 1d4690c99268..56d720c1af39 100644
--- a/drivers/fpga/dfl-fme-main.c
+++ b/drivers/fpga/dfl-fme-main.c
@@ -600,14 +600,16 @@ static int fme_open(struct inode *inode, struct file *filp)
if (WARN_ON(!pdata))
return -ENODEV;
- ret = dfl_feature_dev_use_begin(pdata);
- if (ret)
- return ret;
-
- dev_dbg(&fdev->dev, "Device File Open\n");
- filp->private_data = pdata;
+ mutex_lock(&pdata->lock);
+ ret = dfl_feature_dev_use_begin(pdata, filp->f_flags & O_EXCL);
+ if (!ret) {
+ dev_dbg(&fdev->dev, "Device File Opened %d Times\n",
+ dfl_feature_dev_use_count(pdata));
+ filp->private_data = pdata;
+ }
+ mutex_unlock(&pdata->lock);
- return 0;
+ return ret;
}
static int fme_release(struct inode *inode, struct file *filp)
@@ -616,7 +618,10 @@ static int fme_release(struct inode *inode, struct file *filp)
struct platform_device *pdev = pdata->dev;
dev_dbg(&pdev->dev, "Device File Release\n");
+
+ mutex_lock(&pdata->lock);
dfl_feature_dev_use_end(pdata);
+ mutex_unlock(&pdata->lock);
return 0;
}