The function unregister_chrdev_region is called with a different counter
as the alloc_chrdev_region. To fix this, this patch introduces the
constant CHRDEV_REGION_SIZE that is used in both functions.
Signed-off-by: Christian Gromm <christian.gromm@xxxxxxxxxxxxx>
---
drivers/staging/most/cdev/cdev.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/staging/most/cdev/cdev.c b/drivers/staging/most/cdev/cdev.c
index 89d7fc7..9ce7fd2 100644
--- a/drivers/staging/most/cdev/cdev.c
+++ b/drivers/staging/most/cdev/cdev.c
@@ -18,6 +18,8 @@
#include <linux/idr.h>
#include "most/core.h"
+#define CHRDEV_REGION_SIZE 50
+
static struct cdev_component {
dev_t devno;
struct ida minor_id;
@@ -513,7 +515,7 @@ static int __init mod_init(void)
spin_lock_init(&ch_list_lock);
ida_init(&comp.minor_id);
- err = alloc_chrdev_region(&comp.devno, 0, 50, "cdev");
+ err = alloc_chrdev_region(&comp.devno, 0, CHRDEV_REGION_SIZE, "cdev");
if (err < 0)
goto dest_ida;
comp.major = MAJOR(comp.devno);
@@ -523,7 +525,7 @@ static int __init mod_init(void)
return 0;
free_cdev:
- unregister_chrdev_region(comp.devno, 1);
+ unregister_chrdev_region(comp.devno, CHRDEV_REGION_SIZE);
dest_ida:
ida_destroy(&comp.minor_id);
class_destroy(comp.class);
--
2.7.4
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