stk-webcam: fix an endian bug in stk_camera_read_reg()
commit d08876f524a605d64c7ca32cb8e9f5be3839e82e upstream.
We pass an int pointer to stk_camera_read_reg() but only write to the
highest byte. It's a bug on big endian systems and generally a nasty
thing to do and doesn't match the write function either.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Cc: Amit Pundir <amit.pundir@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/media/usb/stkwebcam/stk-sensor.c b/drivers/media/usb/stkwebcam/stk-sensor.c
index e546b01..2dcc8d0 100644
--- a/drivers/media/usb/stkwebcam/stk-sensor.c
+++ b/drivers/media/usb/stkwebcam/stk-sensor.c
@@ -228,7 +228,7 @@
static int stk_sensor_outb(struct stk_camera *dev, u8 reg, u8 val)
{
int i = 0;
- int tmpval = 0;
+ u8 tmpval = 0;
if (stk_camera_write_reg(dev, STK_IIC_TX_INDEX, reg))
return 1;
@@ -253,7 +253,7 @@
static int stk_sensor_inb(struct stk_camera *dev, u8 reg, u8 *val)
{
int i = 0;
- int tmpval = 0;
+ u8 tmpval = 0;
if (stk_camera_write_reg(dev, STK_IIC_RX_INDEX, reg))
return 1;
@@ -274,7 +274,7 @@
if (stk_camera_read_reg(dev, STK_IIC_RX_VALUE, &tmpval))
return 1;
- *val = (u8) tmpval;
+ *val = tmpval;
return 0;
}
diff --git a/drivers/media/usb/stkwebcam/stk-webcam.c b/drivers/media/usb/stkwebcam/stk-webcam.c
index 22a9aae..1c48f2f 100644
--- a/drivers/media/usb/stkwebcam/stk-webcam.c
+++ b/drivers/media/usb/stkwebcam/stk-webcam.c
@@ -144,7 +144,7 @@
return 0;
}
-int stk_camera_read_reg(struct stk_camera *dev, u16 index, int *value)
+int stk_camera_read_reg(struct stk_camera *dev, u16 index, u8 *value)
{
struct usb_device *udev = dev->udev;
unsigned char *buf;
@@ -163,7 +163,7 @@
sizeof(u8),
500);
if (ret >= 0)
- memcpy(value, buf, sizeof(u8));
+ *value = *buf;
kfree(buf);
return ret;
@@ -171,9 +171,10 @@
static int stk_start_stream(struct stk_camera *dev)
{
- int value;
+ u8 value;
int i, ret;
- int value_116, value_117;
+ u8 value_116, value_117;
+
if (!is_present(dev))
return -ENODEV;
@@ -213,7 +214,7 @@
static int stk_stop_stream(struct stk_camera *dev)
{
- int value;
+ u8 value;
int i;
if (is_present(dev)) {
stk_camera_read_reg(dev, 0x0100, &value);
diff --git a/drivers/media/usb/stkwebcam/stk-webcam.h b/drivers/media/usb/stkwebcam/stk-webcam.h
index 9bbfa3d..92bb48e 100644
--- a/drivers/media/usb/stkwebcam/stk-webcam.h
+++ b/drivers/media/usb/stkwebcam/stk-webcam.h
@@ -129,7 +129,7 @@
#define vdev_to_camera(d) container_of(d, struct stk_camera, vdev)
int stk_camera_write_reg(struct stk_camera *, u16, u8);
-int stk_camera_read_reg(struct stk_camera *, u16, int *);
+int stk_camera_read_reg(struct stk_camera *, u16, u8 *);
int stk_sensor_init(struct stk_camera *);
int stk_sensor_configure(struct stk_camera *);