V4L/DVB (8154): Fix protection problems in the main driver.

- Protect format change when streaming active.
- Protect USB exchanges on close.
- Set a timeout in frame wait.
- Have only one capture file and free the resources when closing this file.
- Simplify the URB buffer.
- Don't reset the control values at open time in pac207.
- Fix compilation warnings of stk014.
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/video/gspca/gspca.h

@@ -108,11 +108,6 @@ struct sd_desc {
 	cam_qmnu_op querymenu;
 };
 
-struct gspca_pktbuf {
-	char *data;
-	struct urb *urb;
-};
-
 /* packet types when moving from iso buf to frame buf */
 #define DISCARD_PACKET	0
 #define FIRST_PACKET	1
@@ -121,19 +116,20 @@ struct gspca_pktbuf {
 
 struct gspca_frame {
 	unsigned char *data;		/* frame buffer */
-	unsigned char *data_end;	/* current end of frame while filling */
+	unsigned char *data_end;	/* end of frame while filling */
 	int vma_use_count;
 	struct v4l2_buffer v4l2_buf;
 };
 
 struct gspca_dev {
-	struct video_device vdev;		/* !! must be the first item */
+	struct video_device vdev;	/* !! must be the first item */
 	struct usb_device *dev;
+	struct file *capt_file;		/* file doing video capture */
 
 	struct cam cam;				/* device information */
 	const struct sd_desc *sd_desc;		/* subdriver description */
 
-	struct gspca_pktbuf pktbuf[NURBS];
+	struct urb *urb[NURBS];
 
 	__u8 *frbuf;				/* buffer for nframes */
 	struct gspca_frame frame[GSPCA_MAX_FRAMES];
@@ -147,7 +143,7 @@ struct gspca_dev {
 
 	__u8 iface;			/* USB interface number */
 	__u8 alt;			/* USB alternate setting */
-	char curr_mode;			/* current camera mode */
+	unsigned char curr_mode;	/* current camera mode */
 	__u32 pixfmt;			/* current mode parameters */
 	short width;
 	short height;
@@ -158,7 +154,7 @@ struct gspca_dev {
 	struct mutex read_lock;		/* read protection */
 	struct mutex queue_lock;	/* ISOC queue protection */
 	__u32 sequence;			/* frame sequence number */
-	signed char streaming;
+	char streaming;
 	char users;			/* # open */
 	char present;			/* device connected */
 	char nbufread;			/* number of buffers for read() */

drivers/media/video/gspca/pac207.c

@@ -27,8 +27,8 @@
 
 #include "gspca.h"
 
-#define DRIVER_VERSION_NUMBER	KERNEL_VERSION(0, 0, 30)
-static const char version[] = "0.0.30";
+#define DRIVER_VERSION_NUMBER	KERNEL_VERSION(0, 1, 1)
+static const char version[] = "0.1.1";
 
 MODULE_AUTHOR("Hans de Goede <j.w.r.degoede@hhs.nl>");
 MODULE_DESCRIPTION("Pixart PAC207");
@@ -251,6 +251,7 @@ int pac207_read_reg(struct gspca_dev *gspca_dev, u16 index)
 static int sd_config(struct gspca_dev *gspca_dev,
 			const struct usb_device_id *id)
 {
+	struct sd *sd = (struct sd *) gspca_dev;
 	struct cam *cam;
 	u8 idreg[2];
 
@@ -282,6 +283,9 @@ static int sd_config(struct gspca_dev *gspca_dev,
 	cam->epaddr = 0x05;
 	cam->cam_mode = sif_mode;
 	cam->nmodes = ARRAY_SIZE(sif_mode);
+	sd->brightness = PAC207_BRIGHTNESS_DEFAULT;
+	sd->exposure = PAC207_EXPOSURE_DEFAULT;
+	sd->gain = PAC207_GAIN_DEFAULT;
 
 	return 0;
 }
@@ -291,9 +295,6 @@ static int sd_open(struct gspca_dev *gspca_dev)
 {
 	struct sd *sd = (struct sd *) gspca_dev;
 
-	sd->brightness = PAC207_BRIGHTNESS_DEFAULT;
-	sd->exposure = PAC207_EXPOSURE_DEFAULT;
-	sd->gain = PAC207_GAIN_DEFAULT;
 	sd->autogain = 1;
 
 	return 0;

drivers/media/video/gspca/stk014.c

@@ -24,8 +24,8 @@
 #include "gspca.h"
 #include "jpeg.h"
 
-#define DRIVER_VERSION_NUMBER	KERNEL_VERSION(0, 0, 22)
-static const char version[] = "0.0.22";
+#define DRIVER_VERSION_NUMBER	KERNEL_VERSION(0, 1, 0)
+static const char version[] = "0.1.0";
 
 MODULE_AUTHOR("Jean-Francois Moine <http://moinejf.free.fr>");
 MODULE_DESCRIPTION("Syntek DV4000 (STK014) USB Camera Driver");
@@ -390,6 +390,7 @@ static void sd_pkt_scan(struct gspca_dev *gspca_dev,
 			int len)			/* iso packet length */
 {
 	int l;
+	static unsigned char ffd9[] = {0xff, 0xd9};
 
 	/* a frame starts with:
 	 *	- 0xff 0xfe
@@ -445,7 +446,7 @@ static void sd_pkt_scan(struct gspca_dev *gspca_dev,
 	if (len > frame->v4l2_buf.bytesused - 2 - l)
 		len = frame->v4l2_buf.bytesused - 2 - l;
 	gspca_frame_add(gspca_dev, INTER_PACKET, frame, data, len);
-	gspca_frame_add(gspca_dev, LAST_PACKET, frame, "\xff\xd9", 2);
+	gspca_frame_add(gspca_dev, LAST_PACKET, frame, ffd9, 2);
 }
 
 static int sd_setbrightness(struct gspca_dev *gspca_dev, __s32 val)