From: Hans Verkuil <hans.verk...@cisco.com>
In various places the stack was used to provide buffers for USB data, but
this should be allocated memory.
Signed-off-by: Hans Verkuil <hans.verk...@cisco.com>
---
drivers/media/usb/usbvision/usbvision-core.c | 18 ++++++++++--------
drivers/media/usb/usbvision/usbvision-i2c.c | 2 +-
2 files changed, 11 insertions(+), 9 deletions(-)
diff --git a/drivers/media/usb/usbvision/usbvision-core.c
b/drivers/media/usb/usbvision/usbvision-core.c
index ec50984..9f4e630 100644
--- a/drivers/media/usb/usbvision/usbvision-core.c
+++ b/drivers/media/usb/usbvision/usbvision-core.c
@@ -1367,7 +1367,7 @@ static void usbvision_isoc_irq(struct urb *urb)
int usbvision_read_reg(struct usb_usbvision *usbvision, unsigned char reg)
{
int err_code = 0;
- unsigned char buffer[1];
+ unsigned char *buffer = usbvision->ctrl_urb_buffer;
if (!USBVISION_IS_OPERATIONAL(usbvision))
return -1;
@@ -1401,10 +1401,12 @@ int usbvision_write_reg(struct usb_usbvision
*usbvision, unsigned char reg,
if (!USBVISION_IS_OPERATIONAL(usbvision))
return 0;
+ usbvision->ctrl_urb_buffer[0] = value;
err_code = usb_control_msg(usbvision->dev,
usb_sndctrlpipe(usbvision->dev, 1),
USBVISION_OP_CODE,
USB_DIR_OUT | USB_TYPE_VENDOR |
- USB_RECIP_ENDPOINT, 0, (__u16) reg, &value, 1,
HZ);
+ USB_RECIP_ENDPOINT, 0, (__u16) reg,
+ usbvision->ctrl_urb_buffer, 1, HZ);
if (err_code < 0) {
dev_err(&usbvision->dev->dev,
@@ -1596,7 +1598,7 @@ static int usbvision_init_webcam(struct usb_usbvision
*usbvision)
{ 0x27, 0x00, 0x00 }, { 0x28, 0x00, 0x00 }, { 0x29, 0x00, 0x00
}, { 0x08, 0x80, 0x60 },
{ 0x0f, 0x2d, 0x24 }, { 0x0c, 0x80, 0x80 }
};
- char value[3];
+ unsigned char *value = usbvision->ctrl_urb_buffer;
/* the only difference between PAL and NTSC init_values */
if (usbvision_device_data[usbvision->dev_model].video_norm ==
V4L2_STD_NTSC)
@@ -1635,8 +1637,8 @@ static int usbvision_init_webcam(struct usb_usbvision
*usbvision)
static int usbvision_set_video_format(struct usb_usbvision *usbvision, int
format)
{
static const char proc[] = "usbvision_set_video_format";
+ unsigned char *value = usbvision->ctrl_urb_buffer;
int rc;
- unsigned char value[2];
if (!USBVISION_IS_OPERATIONAL(usbvision))
return 0;
@@ -1677,7 +1679,7 @@ int usbvision_set_output(struct usb_usbvision *usbvision,
int width,
int err_code = 0;
int usb_width, usb_height;
unsigned int frame_rate = 0, frame_drop = 0;
- unsigned char value[4];
+ unsigned char *value = usbvision->ctrl_urb_buffer;
if (!USBVISION_IS_OPERATIONAL(usbvision))
return 0;
@@ -1872,7 +1874,7 @@ static int usbvision_set_compress_params(struct
usb_usbvision *usbvision)
{
static const char proc[] = "usbvision_set_compresion_params: ";
int rc;
- unsigned char value[6];
+ unsigned char *value = usbvision->ctrl_urb_buffer;
value[0] = 0x0F; /* Intra-Compression cycle */
value[1] = 0x01; /* Reg.45 one line per strip */
@@ -1946,7 +1948,7 @@ int usbvision_set_input(struct usb_usbvision *usbvision)
{
static const char proc[] = "usbvision_set_input: ";
int rc;
- unsigned char value[8];
+ unsigned char *value = usbvision->ctrl_urb_buffer;
unsigned char dvi_yuv_value;
if (!USBVISION_IS_OPERATIONAL(usbvision))
@@ -2062,8 +2064,8 @@ int usbvision_set_input(struct usb_usbvision *usbvision)
static int usbvision_set_dram_settings(struct usb_usbvision *usbvision)
{
+ unsigned char *value = usbvision->ctrl_urb_buffer;
int rc;
- unsigned char value[8];
if (usbvision->isoc_mode == ISOC_MODE_COMPRESS) {
value[0] = 0x42;
diff --git a/drivers/media/usb/usbvision/usbvision-i2c.c
b/drivers/media/usb/usbvision/usbvision-i2c.c
index 26dbcb1..120de2e 100644
--- a/drivers/media/usb/usbvision/usbvision-i2c.c
+++ b/drivers/media/usb/usbvision/usbvision-i2c.c
@@ -343,7 +343,7 @@ static int usbvision_i2c_write_max4(struct usb_usbvision
*usbvision,
{
int rc, retries;
int i;
- unsigned char value[6];
+ unsigned char *value = usbvision->ctrl_urb_buffer;
unsigned char ser_cont;
ser_cont = (len & 0x07) | 0x10;
--
2.1.4
--
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