V4L/DVB (4699): CX24109 patch to eliminate the weird mis-tunings

A number of people have been reporting wierd tuning problems with various
cards. Yeasah tracked down the problem to a miss-read datasheet. This
resolves the problems.

Signed-off-by: Yeasah Pell <yeasah@schwide.net>
Signed-off-by: Steven Toth <stoth@hauppauge.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

diff --git a/drivers/media/dvb/frontends/cx24123.c b/drivers/media/dvb/frontends/cx24123.c
index 62d69a6..a356d28 100644 (file)
--- a/drivers/media/dvb/frontends/cx24123.c
+++ b/drivers/media/dvb/frontends/cx24123.c
@@ -553,8 +553,8 @@ static int cx24123_pll_calculate(struct dvb_frontend* fe, struct dvb_frontend_pa
        ndiv = ( ((p->frequency * vco_div * 10) / (2 * XTAL / 1000)) / 32) & 0x1ff;
        adiv = ( ((p->frequency * vco_div * 10) / (2 * XTAL / 1000)) % 32) & 0x1f;
 
-       if (adiv == 0)
-               ndiv++;
+       if (adiv == 0 && ndiv > 0)
+               ndiv--;
 
        /* control bits 11, refdiv 11, charge pump polarity 1, charge pump current, ndiv, adiv */
        state->pllarg = (3 << 19) | (3 << 17) | (1 << 16) | (pump << 14) | (ndiv << 5) | adiv;