[media] radio drivers: in non-blocking mode return EAGAIN in hwseek

VIDIOC_S_HW_FREQ_SEEK should return EAGAIN when called in non-blocking
mode. This might change in the future if we add support for this in the
future, but right now this is not supported.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

6 files changed, 18 insertions, 0 deletions

diff --git a/drivers/media/radio/radio-mr800.c b/drivers/media/radio/radio-mr800.c
index 720bf0da599c..9c5a267b60b4 100644
--- a/drivers/media/radio/radio-mr800.c
+++ b/drivers/media/radio/radio-mr800.c
@@ -360,6 +360,9 @@ static int vidioc_s_hw_freq_seek(struct file *file, void *priv,
         if (seek->tuner != 0 || !seek->wrap_around)
                 return -EINVAL;
 
+        if (file->f_flags & O_NONBLOCK)
+                return -EWOULDBLOCK;
+
         retval = amradio_send_cmd(radio,
                         AMRADIO_SET_SEARCH_LVL, 0, buf, 8, false);
         if (retval)
diff --git a/drivers/media/radio/radio-tea5777.c b/drivers/media/radio/radio-tea5777.c
index c1a2ea6e87a3..4b5190d4fea5 100644
--- a/drivers/media/radio/radio-tea5777.c
+++ b/drivers/media/radio/radio-tea5777.c
@@ -397,6 +397,9 @@ static int vidioc_s_hw_freq_seek(struct file *file, void *fh,
         if (a->tuner || a->wrap_around)
                 return -EINVAL;
 
+        if (file->f_flags & O_NONBLOCK)
+                return -EWOULDBLOCK;
+
         if (rangelow || rangehigh) {
                 for (i = 0; i < ARRAY_SIZE(bands); i++) {
                         if (i == BAND_AM && !tea->has_am)
diff --git a/drivers/media/radio/radio-wl1273.c b/drivers/media/radio/radio-wl1273.c
index b53ecbc67f17..9b0c9fa0beb8 100644
--- a/drivers/media/radio/radio-wl1273.c
+++ b/drivers/media/radio/radio-wl1273.c
@@ -1693,6 +1693,9 @@ static int wl1273_fm_vidioc_s_hw_freq_seek(struct file *file, void *priv,
         if (seek->tuner != 0 || seek->type != V4L2_TUNER_RADIO)
                 return -EINVAL;
 
+        if (file->f_flags & O_NONBLOCK)
+                return -EWOULDBLOCK;
+
         if (mutex_lock_interruptible(&core->lock))
                 return -EINTR;
 
diff --git a/drivers/media/radio/si470x/radio-si470x-common.c b/drivers/media/radio/si470x/radio-si470x-common.c
index 74a5c901471f..18989388ddc1 100644
--- a/drivers/media/radio/si470x/radio-si470x-common.c
+++ b/drivers/media/radio/si470x/radio-si470x-common.c
@@ -708,6 +708,9 @@ static int si470x_vidioc_s_hw_freq_seek(struct file *file, void *priv,
         if (seek->tuner != 0)
                 return -EINVAL;
 
+        if (file->f_flags & O_NONBLOCK)
+                return -EWOULDBLOCK;
+
         return si470x_set_seek(radio, seek);
 }
 
diff --git a/drivers/media/radio/wl128x/fmdrv_v4l2.c b/drivers/media/radio/wl128x/fmdrv_v4l2.c
index 8a672a31a656..048de4536036 100644
--- a/drivers/media/radio/wl128x/fmdrv_v4l2.c
+++ b/drivers/media/radio/wl128x/fmdrv_v4l2.c
@@ -408,6 +408,9 @@ static int fm_v4l2_vidioc_s_hw_freq_seek(struct file *file, void *priv,
         struct fmdev *fmdev = video_drvdata(file);
         int ret;
 
+        if (file->f_flags & O_NONBLOCK)
+                return -EWOULDBLOCK;
+
         if (fmdev->curr_fmmode != FM_MODE_RX) {
                 ret = fmc_set_mode(fmdev, FM_MODE_RX);
                 if (ret != 0) {
diff --git a/sound/i2c/other/tea575x-tuner.c b/sound/i2c/other/tea575x-tuner.c
index 4a8fad674f02..3c6c1e3226f3 100644
--- a/sound/i2c/other/tea575x-tuner.c
+++ b/sound/i2c/other/tea575x-tuner.c
@@ -368,6 +368,9 @@ static int vidioc_s_hw_freq_seek(struct file *file, void *fh,
         if (a->tuner || a->wrap_around)
                 return -EINVAL;
 
+        if (file->f_flags & O_NONBLOCK)
+                return -EWOULDBLOCK;
+
         if (a->rangelow || a->rangehigh) {
                 for (i = 0; i < ARRAY_SIZE(bands); i++) {
                         if ((i == BAND_FM && tea->tea5759) ||