[PATCH 4.19 140/346] media: tm6000: Fix sizeof() mismatches

Greg Kroah-Hartman
2020-12-28T13:26:58Z

From: Colin Ian King <colin.king@canonical.com>

[ Upstream commit a08ad6339e0441ca12533969ed94a87e3655426e ]

The are two instances of sizeof() being used incorrectly. The
sizeof(void *) is incorrect because urb_buffer is a char ** pointer,
fix this by using sizeof(*dev->urb_buffer). The sizeof(dma_addr_t *)
is incorrect, it should be sizeof(*dev->urb_dma), which is a dma_addr_t
and not a dma_addr_t *. This errors did not cause any issues because
it just so happens the sizes are the same.

Addresses-Coverity: ("Sizeof not portable (SIZEOF_MISMATCH)")

Fixes: 16427faf2867 ("[media] tm6000: Add parameter to keep urb bufs allocated")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/media/usb/tm6000/tm6000-video.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/media/usb/tm6000/tm6000-video.c b/drivers/media/usb/tm6000/tm6000-video.c
index 96055de6e8ce2..62f0128419717 100644
--- a/drivers/media/usb/tm6000/tm6000-video.c
+++ b/drivers/media/usb/tm6000/tm6000-video.c
@@ -463,11 +463,12 @@ static int tm6000_alloc_urb_buffers(struct tm6000_core *dev)
if (dev->urb_buffer)
return 0;

- dev->urb_buffer = kmalloc_array(num_bufs, sizeof(void *), GFP_KERNEL);
+ dev->urb_buffer = kmalloc_array(num_bufs, sizeof(*dev->urb_buffer),
+ GFP_KERNEL);
if (!dev->urb_buffer)
return -ENOMEM;

- dev->urb_dma = kmalloc_array(num_bufs, sizeof(dma_addr_t *),
+ dev->urb_dma = kmalloc_array(num_bufs, sizeof(*dev->urb_dma),
GFP_KERNEL);
if (!dev->urb_dma)
return -ENOMEM;
--
2.27.0