[media] em28xx: remove obsolete device state checks from the ioctl functions

v4l2_device_disconnect() is called when the device is disconnected, so that the
v4l2-core rejects all ioctl calls.

Signed-off-by: Frank Schäfer <fschaefer.oss@googlemail.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/media/usb/em28xx/em28xx-video.c b/drivers/media/usb/em28xx/em28xx-video.c
index e7f6f57..c214305 100644 (file)
--- a/drivers/media/usb/em28xx/em28xx-video.c
+++ b/drivers/media/usb/em28xx/em28xx-video.c
@@ -799,15 +799,6 @@ const struct v4l2_ctrl_ops em28xx_ctrl_ops = {
        .s_ctrl = em28xx_s_ctrl,
 };
 
-static int check_dev(struct em28xx *dev)
-{
-       if (dev->disconnected) {
-               em28xx_errdev("v4l2 ioctl: device not present\n");
-               return -ENODEV;
-       }
-       return 0;
-}
-
 static void get_scale(struct em28xx *dev,
                        unsigned int width, unsigned int height,
                        unsigned int *hscale, unsigned int *vscale)
@@ -957,11 +948,6 @@ static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *norm)
 {
        struct em28xx_fh   *fh  = priv;
        struct em28xx      *dev = fh->dev;
-       int                rc;
-
-       rc = check_dev(dev);
-       if (rc < 0)
-               return rc;
 
        *norm = dev->norm;
 
@@ -972,11 +958,6 @@ static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *norm)
 {
        struct em28xx_fh   *fh  = priv;
        struct em28xx      *dev = fh->dev;
-       int                rc;
-
-       rc = check_dev(dev);
-       if (rc < 0)
-               return rc;
 
        v4l2_device_call_all(&dev->v4l2_dev, 0, video, querystd, norm);
 
@@ -988,13 +969,9 @@ static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id *norm)
        struct em28xx_fh   *fh  = priv;
        struct em28xx      *dev = fh->dev;
        struct v4l2_format f;
-       int                rc;
 
        if (*norm == dev->norm)
                return 0;
-       rc = check_dev(dev);
-       if (rc < 0)
-               return rc;
 
        if (dev->streaming_users > 0)
                return -EBUSY;
@@ -1101,11 +1078,6 @@ static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
 {
        struct em28xx_fh   *fh  = priv;
        struct em28xx      *dev = fh->dev;
-       int                rc;
-
-       rc = check_dev(dev);
-       if (rc < 0)
-               return rc;
 
        if (i >= MAX_EM28XX_INPUT)
                return -EINVAL;
@@ -1180,11 +1152,6 @@ static int vidioc_g_tuner(struct file *file, void *priv,
 {
        struct em28xx_fh      *fh  = priv;
        struct em28xx         *dev = fh->dev;
-       int                   rc;
-
-       rc = check_dev(dev);
-       if (rc < 0)
-               return rc;
 
        if (0 != t->index)
                return -EINVAL;
@@ -1200,11 +1167,6 @@ static int vidioc_s_tuner(struct file *file, void *priv,
 {
        struct em28xx_fh      *fh  = priv;
        struct em28xx         *dev = fh->dev;
-       int                   rc;
-
-       rc = check_dev(dev);
-       if (rc < 0)
-               return rc;
 
        if (0 != t->index)
                return -EINVAL;
@@ -1231,11 +1193,6 @@ static int vidioc_s_frequency(struct file *file, void *priv,
 {
        struct em28xx_fh      *fh  = priv;
        struct em28xx         *dev = fh->dev;
-       int                   rc;
-
-       rc = check_dev(dev);
-       if (rc < 0)
-               return rc;
 
        if (0 != f->tuner)
                return -EINVAL;