Mar 06 2015

Staging: media: Replace dev_err with pr_err to avoid null pointer derefrence 

Author: Haneen Mohammed <hamohammed.sa@gmail.com>

This patch replace dev_err with pr_err, for pointer is derefrenced after comparing it to NULL.
This was found using the following coccinelle script:

@disable is_null@
identifier f;
expression E;
identifier fld;
statement S;
@@

+ if(E == NULL) S
	f(...,E->fld,...);
-if(E == NULL) S;

@@
identifier f;
expression E;
identifier fld;
statement S;
@@

+ if(!E) S
	f(...,E->fld,...);
-if(!E) S;

Signed-off-by: Haneen Mohammed 
Signed-off-by: Greg Kroah-Hartman 

---
 drivers/staging/media/lirc/lirc_zilog.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)
 
diff --git a/drivers/staging/media/lirc/lirc_zilog.c b/drivers/staging/media/lirc/lirc_zilog.c
index e16627c..261e27d 100644
--- a/drivers/staging/media/lirc/lirc_zilog.c
+++ b/drivers/staging/media/lirc/lirc_zilog.c
@@ -1341,8 +1341,7 @@ static int close(struct inode *node, struct file *filep)
 	struct IR *ir = filep->private_data;
 
 	if (ir == NULL) {
-		dev_err(ir->l.dev,
-			"close: no private_data attached to the file!\n");
+		pr_err("ir: close: no private_data attached to the file!\n");
 		return -ENODEV;
 	}

qlambert