[media] v4l2: make vidioc_s_freq_hw_seek const

Write-only ioctls should have a const argument in the ioctl op.
Do this conversion for vidioc_s_freq_hw_seek.
Adding const for write-only ioctls was decided during the 2012 Media Workshop.

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

1 files changed, 17 insertions, 15 deletions

diff --git a/drivers/media/radio/radio-tea5777.c b/drivers/media/radio/radio-tea5777.c
index ef8289829794..c1a2ea6e87a3 100644
--- a/drivers/media/radio/radio-tea5777.c
+++ b/drivers/media/radio/radio-tea5777.c
@@ -385,59 +385,61 @@ static int vidioc_s_frequency(struct file *file, void *priv,
 }
 
 static int vidioc_s_hw_freq_seek(struct file *file, void *fh,
-                                        struct v4l2_hw_freq_seek *a)
+                                        const struct v4l2_hw_freq_seek *a)
 {
         struct radio_tea5777 *tea = video_drvdata(file);
         unsigned long timeout;
+        u32 rangelow = a->rangelow;
+        u32 rangehigh = a->rangehigh;
         int i, res, spacing;
         u32 orig_freq;
 
         if (a->tuner || a->wrap_around)
                 return -EINVAL;
 
-        if (a->rangelow || a->rangehigh) {
+        if (rangelow || rangehigh) {
                 for (i = 0; i < ARRAY_SIZE(bands); i++) {
                         if (i == BAND_AM && !tea->has_am)
                                 continue;
-                        if (bands[i].rangelow  >= a->rangelow &&
-                            bands[i].rangehigh <= a->rangehigh)
+                        if (bands[i].rangelow  >= rangelow &&
+                            bands[i].rangehigh <= rangehigh)
                                 break;
                 }
                 if (i == ARRAY_SIZE(bands))
                         return -EINVAL; /* No matching band found */
 
                 tea->band = i;
-                if (tea->freq < a->rangelow || tea->freq > a->rangehigh) {
-                        tea->freq = clamp(tea->freq, a->rangelow,
-                                                     a->rangehigh);
+                if (tea->freq < rangelow || tea->freq > rangehigh) {
+                        tea->freq = clamp(tea->freq, rangelow,
+                                                     rangehigh);
                         res = radio_tea5777_set_freq(tea);
                         if (res)
                                 return res;
                 }
         } else {
-                a->rangelow  = bands[tea->band].rangelow;
-                a->rangehigh = bands[tea->band].rangehigh;
+                rangelow  = bands[tea->band].rangelow;
+                rangehigh = bands[tea->band].rangehigh;
         }
 
         spacing   = (tea->band == BAND_AM) ? (5 * 16) : (200 * 16); /* kHz */
         orig_freq = tea->freq;
 
         tea->write_reg |= TEA5777_W_PROGBLIM_MASK;
-        if (tea->seek_rangelow != a->rangelow) {
+        if (tea->seek_rangelow != rangelow) {
                 tea->write_reg &= ~TEA5777_W_UPDWN_MASK;
-                tea->freq = a->rangelow;
+                tea->freq = rangelow;
                 res = radio_tea5777_set_freq(tea);
                 if (res)
                         goto leave;
-                tea->seek_rangelow = a->rangelow;
+                tea->seek_rangelow = rangelow;
         }
-        if (tea->seek_rangehigh != a->rangehigh) {
+        if (tea->seek_rangehigh != rangehigh) {
                 tea->write_reg |= TEA5777_W_UPDWN_MASK;
-                tea->freq = a->rangehigh;
+                tea->freq = rangehigh;
                 res = radio_tea5777_set_freq(tea);
                 if (res)
                         goto leave;
-                tea->seek_rangehigh = a->rangehigh;
+                tea->seek_rangehigh = rangehigh;
         }
         tea->write_reg &= ~TEA5777_W_PROGBLIM_MASK;