From 035cad576d4e8c472a97b8913f92f73c93205fd3 Mon Sep 17 00:00:00 2001
From: Jemma Denson <jdenson@gmail.com>
Date: Sun, 28 Feb 2016 15:29:50 -0300
Subject: [PATCH] [media] cx24120: make sure tuner is locked at get_frontend
Change get_frontend to re-check current lock status rather than relying
on a cached value from get_status. Removes potential for tuning failure
if get_frontend is called during tuning.
Probably not too essential as other changes work around this:
https://patchwork.linuxtv.org/patch/32845/
Signed-off-by: Jemma Denson <jdenson@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
---
drivers/media/dvb-frontends/cx24120.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/media/dvb-frontends/cx24120.c b/drivers/media/dvb-frontends/cx24120.c
index 6ccbd86c949027..066ee387bf2508 100644
--- a/drivers/media/dvb-frontends/cx24120.c
+++ b/drivers/media/dvb-frontends/cx24120.c
@@ -1507,11 +1507,13 @@ static int cx24120_get_frontend(struct dvb_frontend *fe,
{
struct cx24120_state *state = fe->demodulator_priv;
u8 freq1, freq2, freq3;
+ int status;
dev_dbg(&state->i2c->dev, "\n");
/* don't return empty data if we're not tuned in */
- if ((state->fe_status & FE_HAS_LOCK) == 0)
+ status = cx24120_readreg(state, CX24120_REG_STATUS);
+ if (!(status & CX24120_HAS_LOCK))
return 0;
/* Get frequency */
--
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