[media] tda10071: change firmware download condition

Reading firmware status register to detect whether firmware is
running or not didn't work 100% reliably. That register was
likely set by firmware itself which means it could not contain
reasonable values until firmware is up and running. Usually it
just worked as some garbage value was returned accidentally but it
appears that in some cases returned garbage value was 0x00 which
was considered "firmware is up and running" by the driver and
firmware loading was skipped leaving device to non-working state.
Fix problem by removing unreliable check and let the driver keep
count whether firmware is loaded or not.

Signed-off-by: Andreas Matthies <a.matthies@gmx.net>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

diff --git a/drivers/media/dvb-frontends/tda10071.c b/drivers/media/dvb-frontends/tda10071.c
index 2521f7e23018f70a33a9ad43e1bb26e79e037ab8..e79749cfec814b75f0ac84d2f5ad881399a79a75 100644 (file)
--- a/drivers/media/dvb-frontends/tda10071.c
+++ b/drivers/media/dvb-frontends/tda10071.c
@@ -912,14 +912,8 @@ static int tda10071_init(struct dvb_frontend *fe)
                { 0xd5, 0x03, 0x03 },
        };
 
-       /* firmware status */
-       ret = tda10071_rd_reg(priv, 0x51, &tmp);
-       if (ret)
-               goto error;
-
-       if (!tmp) {
+       if (priv->warm) {
                /* warm state - wake up device from sleep */
-               priv->warm = 1;
 
                for (i = 0; i < ARRAY_SIZE(tab); i++) {
                        ret = tda10071_wr_reg_mask(priv, tab[i].reg,
@@ -937,7 +931,6 @@ static int tda10071_init(struct dvb_frontend *fe)
                        goto error;
        } else {
                /* cold state - try to download firmware */
-               priv->warm = 0;
 
                /* request the firmware, this will block and timeout */
                ret = request_firmware(&fw, fw_file, priv->i2c->dev.parent);