[PATCH 4.4 173/241] media: go7007: avoid clang frame overflow warning with KASAN

From: Greg Kroah-Hartman
Date: Sun Jun 09 2019 - 13:07:53 EST

[ Upstream commit ed713a4a1367aca5c0f2f329579465db00c17995 ]

clang-8 warns about one function here when KASAN is enabled, even
without the 'asan-stack' option:

drivers/media/usb/go7007/go7007-fw.c:1551:5: warning: stack frame size of 2656 bytes in function

I have reported this issue in the llvm bugzilla, but to make
it work with the clang-8 release, a small annotation is still

Link: https://bugs.llvm.org/show_bug.cgi?id=38809

Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xxxxxxxxx>
[hverkuil-cisco@xxxxxxxxx: fix checkpatch warning]
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
drivers/media/usb/go7007/go7007-fw.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/media/usb/go7007/go7007-fw.c b/drivers/media/usb/go7007/go7007-fw.c
index 60bf5f0644d11..a5efcd4f7b4f5 100644
--- a/drivers/media/usb/go7007/go7007-fw.c
+++ b/drivers/media/usb/go7007/go7007-fw.c
@@ -1499,8 +1499,8 @@ static int modet_to_package(struct go7007 *go, __le16 *code, int space)
return cnt;

-static int do_special(struct go7007 *go, u16 type, __le16 *code, int space,
- int *framelen)
+static noinline_for_stack int do_special(struct go7007 *go, u16 type,
+ __le16 *code, int space, int *framelen)
switch (type) {