[media] ds3000: return error if invalid symbol rate is set

Return -EINVAL if ds3000_set_frontend is called with invalid parameters.

v1 of the patch series got incorrect subject lines.

Signed-off-by: Olli Salonen <olli.salonen@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

diff --git a/drivers/media/dvb-frontends/ds3000.c b/drivers/media/dvb-frontends/ds3000.c
index addffc33993a9dc234e479ac0f55d91d536eeed1..447b518e287a305b0749c1a6128cea6232f3f1a6 100644 (file)
--- a/drivers/media/dvb-frontends/ds3000.c
+++ b/drivers/media/dvb-frontends/ds3000.c
@@ -959,6 +959,15 @@ static int ds3000_set_frontend(struct dvb_frontend *fe)
        /* enable ac coupling */
        ds3000_writereg(state, 0x25, 0x8a);
 
+       if ((c->symbol_rate < ds3000_ops.info.symbol_rate_min) ||
+                       (c->symbol_rate > ds3000_ops.info.symbol_rate_max)) {
+               dprintk("%s() symbol_rate %u out of range (%u ... %u)\n",
+                               __func__, c->symbol_rate,
+                               ds3000_ops.info.symbol_rate_min,
+                               ds3000_ops.info.symbol_rate_max);
+               return -EINVAL;
+       }
+
        /* enhance symbol rate performance */
        if ((c->symbol_rate / 1000) <= 5000) {
                value = 29777 / (c->symbol_rate / 1000) + 1;