fix for kernel weirdness when transcode devices are closed

git-svn-id: http://svn.digium.com/svn/zaptel/trunk@1342 5390a7c7-147a-4af0-8ec9-7488f05a26cb

1 files changed, 8 insertions, 0 deletions

diff --git a/zttranscode.c b/zttranscode.c
index 334304b..5c9f26b 100644
--- a/zttranscode.c
+++ b/zttranscode.c
@@ -199,9 +199,17 @@ static int zt_tc_open(struct inode *inode, struct file *file)
 
 static void ztc_release(struct zt_transcoder_channel *ztc)
 {
+	struct zt_transcode_header *zth = ztc->tch;
+	struct page *page;
+
 	if (!ztc)
 		return;
 
+	for (page = virt_to_page(zth);
+	     page < virt_to_page((unsigned long) zth + sizeof(*zth));
+	     page++)
+		ClearPageReserved(page);
+
 	ztc->flags &= ~(ZT_TC_FLAG_BUSY);
 	if (ztc->tch)
 		kfree(ztc->tch);