V4L/DVB: cx88: fix setting input when using DVB

In cx88-mpeg.c, there is code that sets core->input to CX88_VMUX_DVB.
However, this may be incorrect, since core->input is actually an
index to core->board.input[], which has not enough elements to be
indexed by the value of CX88_VMUX_DVB. So, the modified code searches
core->board.input[] for an input with a type of CX88_VMUX_DVB, and if
it does not find one, the index is simply set to zero.
The change may not have much effect, though, since it appears the only
case when core->input is actually used is when the current input is
being queried.

Signed-off-by: Istvan Varga <istvanv@users.sourceforge.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/media/video/cx88/cx88-mpeg.c b/drivers/media/video/cx88/cx88-mpeg.c
index 6aba7af..499f8d5 100644 (file)
--- a/drivers/media/video/cx88/cx88-mpeg.c
+++ b/drivers/media/video/cx88/cx88-mpeg.c
@@ -599,13 +599,22 @@ struct cx8802_driver * cx8802_get_driver(struct cx8802_dev *dev, enum cx88_board
 static int cx8802_request_acquire(struct cx8802_driver *drv)
 {
        struct cx88_core *core = drv->core;
+       unsigned int    i;
 
        /* Fail a request for hardware if the device is busy. */
        if (core->active_type_id != CX88_BOARD_NONE &&
            core->active_type_id != drv->type_id)
                return -EBUSY;
 
-       core->input = CX88_VMUX_DVB;
+       core->input = 0;
+       for (i = 0;
+            i < (sizeof(core->board.input) / sizeof(struct cx88_input));
+            i++) {
+               if (core->board.input[i].type == CX88_VMUX_DVB) {
+                       core->input = i;
+                       break;
+               }
+       }
 
        if (drv->advise_acquire)
        {