[media] coda: fix double call to debugfs_remove

In coda_free_aux_buf() call debugfs_remove only if buffer entry
is valid (and therfore dentry is valid), double protect by
invalidating dentry value.

Fixes erroneous prematurely dealloc of debugfs caused by
incorrect reference count incrementing.

Signed-off-by: Peter Seiderer <ps.report@gmx.net>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Kamil Debski <k.debski@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

diff --git a/drivers/media/platform/coda/coda-common.c b/drivers/media/platform/coda/coda-common.c
index c82ce562d95a0c868e18b14c50b26224976ffe74..2906dd22514304467d456f9556118d5a69ea8d2b 100644 (file)
--- a/drivers/media/platform/coda/coda-common.c
+++ b/drivers/media/platform/coda/coda-common.c
@@ -1215,8 +1215,9 @@ void coda_free_aux_buf(struct coda_dev *dev,
                                  buf->vaddr, buf->paddr);
                buf->vaddr = NULL;
                buf->size = 0;
+               debugfs_remove(buf->dentry);
+               buf->dentry = NULL;
        }
-       debugfs_remove(buf->dentry);
 }
 
 static int coda_start_streaming(struct vb2_queue *q, unsigned int count)