V4L/DVB (6583): Fix em28xx read stream locking

On some situations, closing an streaming application and re-opening were
returning -EBUSY.

Uses the same locking schema also present on cx88.

Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/media/video/em28xx/em28xx.h b/drivers/media/video/em28xx/em28xx.h
index f8ad0f4ae6d..3efc05d2df6 100644
--- a/drivers/media/video/em28xx/em28xx.h
+++ b/drivers/media/video/em28xx/em28xx.h
@@ -224,6 +224,8 @@ struct em28xx {
         unsigned int has_msp34xx:1;
         unsigned int has_tda9887:1;
 
+        unsigned int stream_on:1;       /* Locks streams */
+
         u32 i2s_speed;          /* I2S speed for audio digital stream */
 
         enum em28xx_decoder decoder;
@@ -258,7 +260,6 @@ struct em28xx {
         int vscale;             /* vertical scale factor (see datasheet) */
         int interlaced;         /* 1=interlace fileds, 0=just top fileds */
         int type;
-        unsigned int reader:1;
 
         unsigned long hash;     /* eeprom hash - for boards with generic ID */
         unsigned long i2c_hash; /* i2c devicelist hash - for boards with generic ID */
@@ -297,7 +298,7 @@ struct em28xx {
 
 struct em28xx_fh {
         struct em28xx *dev;
-        unsigned int  reader:1;
+        unsigned int  stream_on:1;      /* Locks streams */
 };
 
 /* Provided by em28xx-i2c.c */