intel_scu_ipcutil: fix major device number handling

We need to save major device number to be able to use it for
unregister_chrdev() in ipc_module_exit().

ipc_module_init() must return 0 on success, not major device number.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Matthew Garrett <mjg@redhat.com>

1 files changed, 6 insertions, 2 deletions

diff --git a/drivers/platform/x86/intel_scu_ipcutil.c b/drivers/platform/x86/intel_scu_ipcutil.c
index b93a03259c16..2d0f9136ea9a 100644
--- a/drivers/platform/x86/intel_scu_ipcutil.c
+++ b/drivers/platform/x86/intel_scu_ipcutil.c
@@ -24,7 +24,7 @@
 #include <linux/init.h>
 #include <asm/intel_scu_ipc.h>
 
-static u32 major;
+static int major;
 
 #define MAX_FW_SIZE 264192
 
@@ -117,7 +117,11 @@ static const struct file_operations scu_ipc_fops = {
 
 static int __init ipc_module_init(void)
 {
-        return register_chrdev(0, "intel_mid_scu", &scu_ipc_fops);
+        major = register_chrdev(0, "intel_mid_scu", &scu_ipc_fops);
+        if (major < 0)
+                return major;
+
+        return 0;
 }
 
 static void __exit ipc_module_exit(void)