[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: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

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)

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)

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;
 

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);
 }
 

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) {

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) ||