FEX-Emu/linux
1
0
Fork 0
mirror of https://github.com/FEX-Emu/linux.git synced 2024-12-18 06:50:08 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

V4L/DVB (6979): tda18271: use a mutex to protect state in critical sections

Browse Source 
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Michael Krufky 2008-01-06 15:31:35 -03:00 committed by Mauro Carvalho Chehab
parent ccbac9bb17
commit 8d316bf54b
2 changed files with 23 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
drivers/media/dvb/frontends/tda18271-fe.c
View File

@ -598,26 +598,36 @@ static int tda18271_init(struct dvb_frontend *fe)
{
struct tda18271_priv *priv = fe->tuner_priv;
mutex_lock(&priv->lock);
/* initialization */
tda18271_ir_cal_init(fe);
if (priv->id == TDA18271HDC2)
tda18271_rf_cal_init(fe);
mutex_unlock(&priv->lock);
return 0;
}
static int tda18271c2_tune(struct dvb_frontend *fe,
u32 ifc, u32 freq, u32 bw, u8 std)
{
struct tda18271_priv *priv = fe->tuner_priv;
tda_dbg("freq = %d, ifc = %d\n", freq, ifc);
tda18271_init(fe);
mutex_lock(&priv->lock);
tda18271_rf_tracking_filters_correction(fe, freq);
tda18271_channel_configuration(fe, ifc, freq, bw, std);
mutex_unlock(&priv->lock);
return 0;
}
@ -632,6 +642,8 @@ static int tda18271c1_tune(struct dvb_frontend *fe,
tda18271_init(fe);
mutex_lock(&priv->lock);
tda_dbg("freq = %d, ifc = %d\n", freq, ifc);
/* RF tracking filter calibration */
@ -766,6 +778,7 @@ static int tda18271c1_tune(struct dvb_frontend *fe,
tda18271_write_regs(fe, R_TM, 15);
msleep(5);
mutex_unlock(&priv->lock);
return 0;
}
@ -1012,7 +1025,9 @@ static int tda18271_get_id(struct dvb_frontend *fe)
char *name;
int ret = 0;
mutex_lock(&priv->lock);
tda18271_read_regs(fe);
mutex_unlock(&priv->lock);
switch (regs[R_ID] & 0x7f) {
case 3:
@ -1065,6 +1080,7 @@ struct dvb_frontend *tda18271_attach(struct dvb_frontend *fe, u8 addr,
priv->i2c_adap = i2c;
priv->gate = (cfg) ? cfg->gate : TDA18271_GATE_AUTO;
priv->cal_initialized = false;
mutex_init(&priv->lock);
fe->tuner_priv = priv;
@ -1084,8 +1100,12 @@ struct dvb_frontend *tda18271_attach(struct dvb_frontend *fe, u8 addr,
if (tda18271_debug & DBG_MAP)
tda18271_dump_std_map(fe);
mutex_lock(&priv->lock);
tda18271_init_regs(fe);
mutex_unlock(&priv->lock);
return fe;
fail:
tda18271_release(fe);

3
drivers/media/dvb/frontends/tda18271-priv.h
View File

@ -23,6 +23,7 @@
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/mutex.h>
#include "tda18271.h"
#define R_ID 0x00 /* ID byte */
@ -112,6 +113,8 @@ struct tda18271_priv {
struct tda18271_std_map std;
struct tda18271_rf_tracking_filter_cal rf_cal_state[8];
struct mutex lock;
u32 frequency;
u32 bandwidth;
};