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Diffstat (limited to 'drivers/media/video/em28xx/em28xx.h')
-rw-r--r--drivers/media/video/em28xx/em28xx.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/media/video/em28xx/em28xx.h b/drivers/media/video/em28xx/em28xx.h
index 8278117..5956e9b 100644
--- a/drivers/media/video/em28xx/em28xx.h
+++ b/drivers/media/video/em28xx/em28xx.h
@@ -102,6 +102,9 @@
#define EM28XX_MIN_BUF 4
#define EM28XX_DEF_BUF 8
+/*Limits the max URB message size */
+#define URB_MAX_CTRL_SIZE 80
+
/* Params for validated field */
#define EM28XX_BOARD_NOT_VALIDATED 1
#define EM28XX_BOARD_VALIDATED 0
@@ -430,6 +433,7 @@ struct em28xx {
/* locks */
struct mutex lock;
+ struct mutex ctrl_urb_lock; /* protects urb_buf */
/* spinlock_t queue_lock; */
struct list_head inqueue, outqueue;
wait_queue_head_t open, wait_frame, wait_stream;
@@ -451,6 +455,8 @@ struct em28xx {
unsigned int *alt_max_pkt_size; /* array of wMaxPacketSize */
struct urb *urb[EM28XX_NUM_BUFS]; /* urb for isoc transfers */
char *transfer_buffer[EM28XX_NUM_BUFS]; /* transfer buffers for isoc transfer */
+ char urb_buf[URB_MAX_CTRL_SIZE]; /* urb control msg buffer */
+
/* helper funcs that call usb_control_msg */
int (*em28xx_write_regs) (struct em28xx *dev, u16 reg,
char *buf, int len);