From d9928a115ac5b1b0e77f42a13b47a2a0d46d96d3 Mon Sep 17 00:00:00 2001 From: Devin Heitmueller Date: Wed, 19 Apr 2017 20:13:52 -0300 Subject: [media] xc5000: Don't spin waiting for analog lock The xc5000 driver should not be spinning waiting for an analog lock. The ioctl() should be returning immediately and the application is responsible for polling for lock status. This behavior isn't very visible in cases where you tune to a valid channel, since lock is usually achieved much faster than 400ms. However it is highly visible where doing things like changing video standards, which sends tuning request for a frequency that is almost never going to have an actual channel on it. Also fixup the return values to treat zero as success and an actual error code on error (to be consistent with other functions). Note this change has no practical effect at this time as none of the callers inspect the return value. Signed-off-by: Devin Heitmueller Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab --- drivers/media/tuners/xc5000.c | 26 ++------------------------ 1 file changed, 2 insertions(+), 24 deletions(-) (limited to 'drivers/media/tuners') diff --git a/drivers/media/tuners/xc5000.c b/drivers/media/tuners/xc5000.c index afdf0c9903d2..0e7e4fdf9e50 100644 --- a/drivers/media/tuners/xc5000.c +++ b/drivers/media/tuners/xc5000.c @@ -565,38 +565,16 @@ static int xc_get_totalgain(struct xc5000_priv *priv, u16 *totalgain) return xc5000_readreg(priv, XREG_TOTALGAIN, totalgain); } -static u16 wait_for_lock(struct xc5000_priv *priv) -{ - u16 lock_state = 0; - int watch_dog_count = 40; - - while ((lock_state == 0) && (watch_dog_count > 0)) { - xc_get_lock_status(priv, &lock_state); - if (lock_state != 1) { - msleep(5); - watch_dog_count--; - } - } - return lock_state; -} - #define XC_TUNE_ANALOG 0 #define XC_TUNE_DIGITAL 1 static int xc_tune_channel(struct xc5000_priv *priv, u32 freq_hz, int mode) { - int found = 0; - dprintk(1, "%s(%u)\n", __func__, freq_hz); if (xc_set_rf_frequency(priv, freq_hz) != 0) - return 0; - - if (mode == XC_TUNE_ANALOG) { - if (wait_for_lock(priv) == 1) - found = 1; - } + return -EREMOTEIO; - return found; + return 0; } static int xc_set_xtal(struct dvb_frontend *fe) -- cgit v1.2.3-59-g8ed1b