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| author | Steven Toth <stoth@hauppauge.com> | 2006-01-09 15:25:22 -0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@brturbo.com.br> | 2006-01-09 15:25:22 -0200 |
| commit | 0144f31466f0b7f1a8b21b470bfeb93c174a2006 (patch) | |
| tree | b46367c45eaf577ae10ef9d10c93ff85504a7f2a | |
| parent | 2c3f11b20fc6c41b4d3f64f301f525e35f18b6bc (diff) | |
| download | op-kernel-dev-0144f31466f0b7f1a8b21b470bfeb93c174a2006.zip op-kernel-dev-0144f31466f0b7f1a8b21b470bfeb93c174a2006.tar.gz | |
V4L/DVB (3130): cx24123: cleanup timout handling
- Cleanup timeout handling in cx24123_pll_writereg(), and
use a reasonable value for the timeout.
Signed-off-by: Steven Toth <stoth@hauppauge.com>
Signed-off-by: Johannes Stezenbach <js@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@brturbo.com.br>
| -rw-r--r-- | drivers/media/dvb/frontends/cx24123.c | 39 |
1 files changed, 16 insertions, 23 deletions
diff --git a/drivers/media/dvb/frontends/cx24123.c b/drivers/media/dvb/frontends/cx24123.c index 3e230fc..d661c6f 100644 --- a/drivers/media/dvb/frontends/cx24123.c +++ b/drivers/media/dvb/frontends/cx24123.c @@ -487,8 +487,7 @@ static int cx24123_pll_calculate(struct dvb_frontend* fe, struct dvb_frontend_pa static int cx24123_pll_writereg(struct dvb_frontend* fe, struct dvb_frontend_parameters *p, u32 data) { struct cx24123_state *state = fe->demodulator_priv; - - u8 timeout = 0; + unsigned long timeout; /* align the 21 bytes into to bit23 boundary */ data = data << 3; @@ -496,43 +495,37 @@ static int cx24123_pll_writereg(struct dvb_frontend* fe, struct dvb_frontend_par /* Reset the demod pll word length to 0x15 bits */ cx24123_writereg(state, 0x21, 0x15); - timeout = 0; /* write the msb 8 bits, wait for the send to be completed */ + timeout = jiffies + msecs_to_jiffies(40); cx24123_writereg(state, 0x22, (data >> 16) & 0xff); - while ( ( cx24123_readreg(state, 0x20) & 0x40 ) == 0 ) - { - /* Safety - No reason why the write should not complete, and we never get here, avoid hang */ - if (timeout++ >= 4) { - printk("%s: demodulator is no longer responding, aborting.\n",__FUNCTION__); + while ((cx24123_readreg(state, 0x20) & 0x40) == 0) { + if (time_after(jiffies, timeout)) { + printk("%s: demodulator is not responding, possibly hung, aborting.\n", __FUNCTION__); return -EREMOTEIO; } - msleep(500); + msleep(10); } - timeout = 0; /* send another 8 bytes, wait for the send to be completed */ + timeout = jiffies + msecs_to_jiffies(40); cx24123_writereg(state, 0x22, (data>>8) & 0xff ); - while ( (cx24123_readreg(state, 0x20) & 0x40 ) == 0 ) - { - /* Safety - No reason why the write should not complete, and we never get here, avoid hang */ - if (timeout++ >= 4) { - printk("%s: demodulator is not responding, possibly hung, aborting.\n",__FUNCTION__); + while ((cx24123_readreg(state, 0x20) & 0x40) == 0) { + if (time_after(jiffies, timeout)) { + printk("%s: demodulator is not responding, possibly hung, aborting.\n", __FUNCTION__); return -EREMOTEIO; } - msleep(500); + msleep(10); } - timeout = 0; /* send the lower 5 bits of this byte, padded with 3 LBB, wait for the send to be completed */ + timeout = jiffies + msecs_to_jiffies(40); cx24123_writereg(state, 0x22, (data) & 0xff ); - while ((cx24123_readreg(state, 0x20) & 0x80)) - { - /* Safety - No reason why the write should not complete, and we never get here, avoid hang */ - if (timeout++ >= 4) { - printk("%s: demodulator is not responding, possibly hung, aborting.\n",__FUNCTION__); + while ((cx24123_readreg(state, 0x20) & 0x80)) { + if (time_after(jiffies, timeout)) { + printk("%s: demodulator is not responding, possibly hung, aborting.\n", __FUNCTION__); return -EREMOTEIO; } - msleep(500); + msleep(10); } /* Trigger the demod to configure the tuner */ |
