diff options
| author | Jean-Francois Moine <moinejf@free.fr> | 2008-07-14 09:38:29 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@infradead.org> | 2008-07-20 07:26:14 -0300 |
| commit | 739570bb218bb4607df1f197282561e97a98e54a (patch) | |
| tree | 25555dfe5ac873bc96866c486d6f6c1dcabf24f4 /drivers/media/video/gspca/pac207.c | |
| parent | 5b77ae7776183d733ec86727bcc34c52a336afd6 (diff) | |
V4L/DVB (8352): gspca: Buffers for USB exchanges cannot be in the stack.
gspca: Protect dq_callback() against simultaneous USB exchanges.
Temporary buffer for USB exchanges added in the device struct.
(all) Use a temporary buffer for all USB exchanges.
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Diffstat (limited to 'drivers/media/video/gspca/pac207.c')
| -rw-r--r-- | drivers/media/video/gspca/pac207.c | 19 |
1 files changed, 9 insertions, 10 deletions
diff --git a/drivers/media/video/gspca/pac207.c b/drivers/media/video/gspca/pac207.c index 5d68d3f42262..fa7abc411090 100644 --- a/drivers/media/video/gspca/pac207.c +++ b/drivers/media/video/gspca/pac207.c @@ -27,8 +27,8 @@ #include "gspca.h" -#define DRIVER_VERSION_NUMBER KERNEL_VERSION(2, 1, 5) -static const char version[] = "2.1.5"; +#define DRIVER_VERSION_NUMBER KERNEL_VERSION(2, 1, 7) +static const char version[] = "2.1.7"; MODULE_AUTHOR("Hans de Goede <j.w.r.degoede@hhs.nl>"); MODULE_DESCRIPTION("Pixart PAC207"); @@ -187,18 +187,18 @@ static const __u8 PacReg72[] = { 0x00, 0x00, 0x36, 0x00 }; static const unsigned char pac207_sof_marker[5] = { 0xff, 0xff, 0x00, 0xff, 0x96 }; -int pac207_write_regs(struct gspca_dev *gspca_dev, u16 index, +static int pac207_write_regs(struct gspca_dev *gspca_dev, u16 index, const u8 *buffer, u16 length) { struct usb_device *udev = gspca_dev->dev; int err; - u8 kbuf[8]; - memcpy(kbuf, buffer, length); + memcpy(gspca_dev->usb_buf, buffer, length); err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x01, USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_INTERFACE, - 0x00, index, kbuf, length, PAC207_CTRL_TIMEOUT); + 0x00, index, + gspca_dev->usb_buf, length, PAC207_CTRL_TIMEOUT); if (err < 0) PDEBUG(D_ERR, "Failed to write registers to index 0x%04X, error %d)", @@ -227,12 +227,12 @@ int pac207_write_reg(struct gspca_dev *gspca_dev, u16 index, u16 value) int pac207_read_reg(struct gspca_dev *gspca_dev, u16 index) { struct usb_device *udev = gspca_dev->dev; - u8 buff; int res; res = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 0x00, USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_INTERFACE, - 0x00, index, &buff, 1, PAC207_CTRL_TIMEOUT); + 0x00, index, + gspca_dev->usb_buf, 1, PAC207_CTRL_TIMEOUT); if (res < 0) { PDEBUG(D_ERR, "Failed to read a register (index 0x%04X, error %d)", @@ -240,10 +240,9 @@ int pac207_read_reg(struct gspca_dev *gspca_dev, u16 index) return res; } - return buff; + return gspca_dev->usb_buf[0]; } - /* this function is called at probe time */ static int sd_config(struct gspca_dev *gspca_dev, const struct usb_device_id *id) |