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| author | Mauro Carvalho Chehab <mchehab@osg.samsung.com> | 2016-03-06 10:12:32 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@osg.samsung.com> | 2016-03-10 13:37:45 -0300 |
| commit | ad7220479244e92d7eba2ecc4b3f3e08312fc68f (patch) | |
| tree | dd25992644f04efdb8ef5ed2c6b80bc15a0ff8d8 | |
| parent | eef8fc374c131647ea9eea3301f06f4eee7f51ae (diff) | |
| download | linux-ad7220479244e92d7eba2ecc4b3f3e08312fc68f.tar.bz2 | |
[media] touptek: don't DMA at the stack
As warned by smatch:
drivers/media/usb/gspca/touptek.c:220 reg_w() error: doing dma on the stack (buff)
drivers/media/usb/gspca/touptek.c:458 configure() error: doing dma on the stack (buff)
This can fail, as the stack may not be in a memory that would
allod DMA. So, use the usb_buf instead.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
| -rw-r--r-- | drivers/media/usb/gspca/touptek.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/media/usb/gspca/touptek.c b/drivers/media/usb/gspca/touptek.c index 7bac6bc96063..8063b8e45ee5 100644 --- a/drivers/media/usb/gspca/touptek.c +++ b/drivers/media/usb/gspca/touptek.c @@ -211,7 +211,7 @@ static int val_reply(struct gspca_dev *gspca_dev, const char *reply, int rc) static void reg_w(struct gspca_dev *gspca_dev, u16 value, u16 index) { - char buff[1]; + char *buff = gspca_dev->usb_buf; int rc; PDEBUG(D_USBO, @@ -438,7 +438,7 @@ static void configure_encrypted(struct gspca_dev *gspca_dev) static int configure(struct gspca_dev *gspca_dev) { int rc; - uint8_t buff[4]; + char *buff = gspca_dev->usb_buf; PDEBUG(D_STREAM, "configure()\n"); |