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Commit ee0133ee authored by Mauro Carvalho Chehab's avatar Mauro Carvalho Chehab
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[media] lgdt3306a: properly handle I/O errors 

Fixes the following smatch errors:

drivers/media/dvb-frontends/lgdt3306a.c: In function 'lgdt3306a_set_if':
drivers/media/dvb-frontends/lgdt3306a.c:695:6: warning: variable 'ret' set but not used [-Wunused-but-set-variable]
  int ret;
      ^
drivers/media/dvb-frontends/lgdt3306a.c: In function 'lgdt3306a_monitor_vsb':
drivers/media/dvb-frontends/lgdt3306a.c:1033:6: warning: variable 'ret' set but not used [-Wunused-but-set-variable]
  int ret;
      ^
drivers/media/dvb-frontends/lgdt3306a.c: In function 'lgdt3306a_check_oper_mode':
drivers/media/dvb-frontends/lgdt3306a.c:1082:6: warning: variable 'ret' set but not used [-Wunused-but-set-variable]
  int ret;
      ^
drivers/media/dvb-frontends/lgdt3306a.c: In function 'lgdt3306a_check_lock_status':
drivers/media/dvb-frontends/lgdt3306a.c:1109:6: warning: variable 'ret' set but not used [-Wunused-but-set-variable]
  int ret;
      ^
drivers/media/dvb-frontends/lgdt3306a.c: In function 'lgdt3306a_check_neverlock_status':
drivers/media/dvb-frontends/lgdt3306a.c:1185:6: warning: variable 'ret' set but not used [-Wunused-but-set-variable]
  int ret;
      ^
drivers/media/dvb-frontends/lgdt3306a.c: In function 'lgdt3306a_pre_monitoring':
drivers/media/dvb-frontends/lgdt3306a.c:1199:6: warning: variable 'ret' set but not used [-Wunused-but-set-variable]
  int ret;
      ^
drivers/media/dvb-frontends/lgdt3306a.c: In function 'lgdt3306a_get_packet_error':
drivers/media/dvb-frontends/lgdt3306a.c:1310:6: warning: variable 'ret' set but not used [-Wunused-but-set-variable]
  int ret;
      ^
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@osg.samsung.com>
parent a132fef8
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Showing with 79 additions and 5 deletions
drivers/media/dvb-frontends/lgdt3306a.c
View file @ ee0133ee
...@@ -734,7 +734,11 @@ static int lgdt3306a_set_if(struct lgdt3306a_state *state, ...@@ -734,7 +734,11 @@ static int lgdt3306a_set_if(struct lgdt3306a_state *state,
break; break;
} }
ret = lgdt3306a_write_reg(state, 0x0010, nco1); ret = lgdt3306a_write_reg(state, 0x0010, nco1);
if (ret)
return ret;
ret = lgdt3306a_write_reg(state, 0x0011, nco2); ret = lgdt3306a_write_reg(state, 0x0011, nco2);
if (ret)
return ret;
lg_dbg("if_freq=%d KHz->[%04x]\n", if_freq_khz, nco1<<8 | nco2); lg_dbg("if_freq=%d KHz->[%04x]\n", if_freq_khz, nco1<<8 | nco2);
...@@ -1027,7 +1031,7 @@ static enum dvbfe_algo lgdt3306a_get_frontend_algo(struct dvb_frontend *fe) ...@@ -1027,7 +1031,7 @@ static enum dvbfe_algo lgdt3306a_get_frontend_algo(struct dvb_frontend *fe)
} }
/* ------------------------------------------------------------------------ */ /* ------------------------------------------------------------------------ */
static void lgdt3306a_monitor_vsb(struct lgdt3306a_state *state) static int lgdt3306a_monitor_vsb(struct lgdt3306a_state *state)
{ {
u8 val; u8 val;
int ret; int ret;
...@@ -1035,16 +1039,27 @@ static void lgdt3306a_monitor_vsb(struct lgdt3306a_state *state) ...@@ -1035,16 +1039,27 @@ static void lgdt3306a_monitor_vsb(struct lgdt3306a_state *state)
u16 fbDlyCir; u16 fbDlyCir;
ret = lgdt3306a_read_reg(state, 0x21a1, &val); ret = lgdt3306a_read_reg(state, 0x21a1, &val);
if (ret)
return ret;
snrRef = val & 0x3f; snrRef = val & 0x3f;
ret = lgdt3306a_read_reg(state, 0x2185, &maxPowerMan); ret = lgdt3306a_read_reg(state, 0x2185, &maxPowerMan);
if (ret)
return ret;
ret = lgdt3306a_read_reg(state, 0x2191, &val); ret = lgdt3306a_read_reg(state, 0x2191, &val);
if (ret)
return ret;
nCombDet = (val & 0x80) >> 7; nCombDet = (val & 0x80) >> 7;
ret = lgdt3306a_read_reg(state, 0x2180, &val); ret = lgdt3306a_read_reg(state, 0x2180, &val);
if (ret)
return ret;
fbDlyCir = (val & 0x03) << 8; fbDlyCir = (val & 0x03) << 8;
ret = lgdt3306a_read_reg(state, 0x2181, &val); ret = lgdt3306a_read_reg(state, 0x2181, &val);
if (ret)
return ret;
fbDlyCir |= val; fbDlyCir |= val;
lg_dbg("snrRef=%d maxPowerMan=0x%x nCombDet=%d fbDlyCir=0x%x\n", lg_dbg("snrRef=%d maxPowerMan=0x%x nCombDet=%d fbDlyCir=0x%x\n",
...@@ -1052,6 +1067,8 @@ static void lgdt3306a_monitor_vsb(struct lgdt3306a_state *state) ...@@ -1052,6 +1067,8 @@ static void lgdt3306a_monitor_vsb(struct lgdt3306a_state *state)
/* Carrier offset sub loop bandwidth */ /* Carrier offset sub loop bandwidth */
ret = lgdt3306a_read_reg(state, 0x1061, &val); ret = lgdt3306a_read_reg(state, 0x1061, &val);
if (ret)
return ret;
val &= 0xf8; val &= 0xf8;
if ((snrRef > 18) && (maxPowerMan > 0x68) && (nCombDet == 0x01) && ((fbDlyCir == 0x03FF) || (fbDlyCir < 0x6C))) { if ((snrRef > 18) && (maxPowerMan > 0x68) && (nCombDet == 0x01) && ((fbDlyCir == 0x03FF) || (fbDlyCir < 0x6C))) {
/* SNR is over 18dB and no ghosting */ /* SNR is over 18dB and no ghosting */
...@@ -1060,20 +1077,30 @@ static void lgdt3306a_monitor_vsb(struct lgdt3306a_state *state) ...@@ -1060,20 +1077,30 @@ static void lgdt3306a_monitor_vsb(struct lgdt3306a_state *state)
val |= 0x04; /* final bandwidth = 4 */ val |= 0x04; /* final bandwidth = 4 */
} }
ret = lgdt3306a_write_reg(state, 0x1061, val); ret = lgdt3306a_write_reg(state, 0x1061, val);
if (ret)
return ret;
/* Adjust Notch Filter */ /* Adjust Notch Filter */
ret = lgdt3306a_read_reg(state, 0x0024, &val); ret = lgdt3306a_read_reg(state, 0x0024, &val);
if (ret)
return ret;
val &= 0x0f; val &= 0x0f;
if (nCombDet == 0) { /* Turn on the Notch Filter */ if (nCombDet == 0) { /* Turn on the Notch Filter */
val |= 0x50; val |= 0x50;
} }
ret = lgdt3306a_write_reg(state, 0x0024, val); ret = lgdt3306a_write_reg(state, 0x0024, val);
if (ret)
return ret;
/* VSB Timing Recovery output normalization */ /* VSB Timing Recovery output normalization */
ret = lgdt3306a_read_reg(state, 0x103d, &val); ret = lgdt3306a_read_reg(state, 0x103d, &val);
if (ret)
return ret;
val &= 0xcf; val &= 0xcf;
val |= 0x20; val |= 0x20;
ret = lgdt3306a_write_reg(state, 0x103d, val); ret = lgdt3306a_write_reg(state, 0x103d, val);
return ret;
} }
static enum lgdt3306a_modulation lgdt3306a_check_oper_mode(struct lgdt3306a_state *state) static enum lgdt3306a_modulation lgdt3306a_check_oper_mode(struct lgdt3306a_state *state)
...@@ -1082,6 +1109,8 @@ static enum lgdt3306a_modulation lgdt3306a_check_oper_mode(struct lgdt3306a_stat ...@@ -1082,6 +1109,8 @@ static enum lgdt3306a_modulation lgdt3306a_check_oper_mode(struct lgdt3306a_stat
int ret; int ret;
ret = lgdt3306a_read_reg(state, 0x0081, &val); ret = lgdt3306a_read_reg(state, 0x0081, &val);
if (ret)
goto err;
if (val & 0x80) { if (val & 0x80) {
lg_dbg("VSB\n"); lg_dbg("VSB\n");
...@@ -1089,6 +1118,8 @@ static enum lgdt3306a_modulation lgdt3306a_check_oper_mode(struct lgdt3306a_stat ...@@ -1089,6 +1118,8 @@ static enum lgdt3306a_modulation lgdt3306a_check_oper_mode(struct lgdt3306a_stat
} }
if (val & 0x08) { if (val & 0x08) {
ret = lgdt3306a_read_reg(state, 0x00a6, &val); ret = lgdt3306a_read_reg(state, 0x00a6, &val);
if (ret)
goto err;
val = val >> 2; val = val >> 2;
if (val & 0x01) { if (val & 0x01) {
lg_dbg("QAM256\n"); lg_dbg("QAM256\n");
...@@ -1098,6 +1129,7 @@ static enum lgdt3306a_modulation lgdt3306a_check_oper_mode(struct lgdt3306a_stat ...@@ -1098,6 +1129,7 @@ static enum lgdt3306a_modulation lgdt3306a_check_oper_mode(struct lgdt3306a_stat
return LG3306_QAM64; return LG3306_QAM64;
} }
} }
err:
lg_warn("UNKNOWN\n"); lg_warn("UNKNOWN\n");
return LG3306_UNKNOWN_MODE; return LG3306_UNKNOWN_MODE;
} }
...@@ -1116,6 +1148,8 @@ static enum lgdt3306a_lock_status lgdt3306a_check_lock_status(struct lgdt3306a_s ...@@ -1116,6 +1148,8 @@ static enum lgdt3306a_lock_status lgdt3306a_check_lock_status(struct lgdt3306a_s
case LG3306_SYNC_LOCK: case LG3306_SYNC_LOCK:
{ {
ret = lgdt3306a_read_reg(state, 0x00a6, &val); ret = lgdt3306a_read_reg(state, 0x00a6, &val);
if (ret)
return ret;
if ((val & 0x80) == 0x80) if ((val & 0x80) == 0x80)
lockStatus = LG3306_LOCK; lockStatus = LG3306_LOCK;
...@@ -1128,6 +1162,8 @@ static enum lgdt3306a_lock_status lgdt3306a_check_lock_status(struct lgdt3306a_s ...@@ -1128,6 +1162,8 @@ static enum lgdt3306a_lock_status lgdt3306a_check_lock_status(struct lgdt3306a_s
case LG3306_AGC_LOCK: case LG3306_AGC_LOCK:
{ {
ret = lgdt3306a_read_reg(state, 0x0080, &val); ret = lgdt3306a_read_reg(state, 0x0080, &val);
if (ret)
return ret;
if ((val & 0x40) == 0x40) if ((val & 0x40) == 0x40)
lockStatus = LG3306_LOCK; lockStatus = LG3306_LOCK;
...@@ -1142,6 +1178,8 @@ static enum lgdt3306a_lock_status lgdt3306a_check_lock_status(struct lgdt3306a_s ...@@ -1142,6 +1178,8 @@ static enum lgdt3306a_lock_status lgdt3306a_check_lock_status(struct lgdt3306a_s
modeOper = lgdt3306a_check_oper_mode(state); modeOper = lgdt3306a_check_oper_mode(state);
if ((modeOper == LG3306_QAM64) || (modeOper == LG3306_QAM256)) { if ((modeOper == LG3306_QAM64) || (modeOper == LG3306_QAM256)) {
ret = lgdt3306a_read_reg(state, 0x1094, &val); ret = lgdt3306a_read_reg(state, 0x1094, &val);
if (ret)
return ret;
if ((val & 0x80) == 0x80) if ((val & 0x80) == 0x80)
lockStatus = LG3306_LOCK; lockStatus = LG3306_LOCK;
...@@ -1158,6 +1196,8 @@ static enum lgdt3306a_lock_status lgdt3306a_check_lock_status(struct lgdt3306a_s ...@@ -1158,6 +1196,8 @@ static enum lgdt3306a_lock_status lgdt3306a_check_lock_status(struct lgdt3306a_s
modeOper = lgdt3306a_check_oper_mode(state); modeOper = lgdt3306a_check_oper_mode(state);
if ((modeOper == LG3306_QAM64) || (modeOper == LG3306_QAM256)) { if ((modeOper == LG3306_QAM64) || (modeOper == LG3306_QAM256)) {
ret = lgdt3306a_read_reg(state, 0x0080, &val); ret = lgdt3306a_read_reg(state, 0x0080, &val);
if (ret)
return ret;
if ((val & 0x10) == 0x10) if ((val & 0x10) == 0x10)
lockStatus = LG3306_LOCK; lockStatus = LG3306_LOCK;
...@@ -1186,6 +1226,8 @@ static enum lgdt3306a_neverlock_status lgdt3306a_check_neverlock_status(struct l ...@@ -1186,6 +1226,8 @@ static enum lgdt3306a_neverlock_status lgdt3306a_check_neverlock_status(struct l
enum lgdt3306a_neverlock_status lockStatus; enum lgdt3306a_neverlock_status lockStatus;
ret = lgdt3306a_read_reg(state, 0x0080, &val); ret = lgdt3306a_read_reg(state, 0x0080, &val);
if (ret)
return ret;
lockStatus = (enum lgdt3306a_neverlock_status)(val & 0x03); lockStatus = (enum lgdt3306a_neverlock_status)(val & 0x03);
lg_dbg("NeverLock=%d", lockStatus); lg_dbg("NeverLock=%d", lockStatus);
...@@ -1193,7 +1235,7 @@ static enum lgdt3306a_neverlock_status lgdt3306a_check_neverlock_status(struct l ...@@ -1193,7 +1235,7 @@ static enum lgdt3306a_neverlock_status lgdt3306a_check_neverlock_status(struct l
return lockStatus; return lockStatus;
} }
static void lgdt3306a_pre_monitoring(struct lgdt3306a_state *state) static int lgdt3306a_pre_monitoring(struct lgdt3306a_state *state)
{ {
u8 val = 0; u8 val = 0;
int ret; int ret;
...@@ -1201,16 +1243,24 @@ static void lgdt3306a_pre_monitoring(struct lgdt3306a_state *state) ...@@ -1201,16 +1243,24 @@ static void lgdt3306a_pre_monitoring(struct lgdt3306a_state *state)
/* Channel variation */ /* Channel variation */
ret = lgdt3306a_read_reg(state, 0x21bc, &currChDiffACQ); ret = lgdt3306a_read_reg(state, 0x21bc, &currChDiffACQ);
if (ret)
return ret;
/* SNR of Frame sync */ /* SNR of Frame sync */
ret = lgdt3306a_read_reg(state, 0x21a1, &val); ret = lgdt3306a_read_reg(state, 0x21a1, &val);
if (ret)
return ret;
snrRef = val & 0x3f; snrRef = val & 0x3f;
/* Strong Main CIR */ /* Strong Main CIR */
ret = lgdt3306a_read_reg(state, 0x2199, &val); ret = lgdt3306a_read_reg(state, 0x2199, &val);
if (ret)
return ret;
mainStrong = (val & 0x40) >> 6; mainStrong = (val & 0x40) >> 6;
ret = lgdt3306a_read_reg(state, 0x0090, &val); ret = lgdt3306a_read_reg(state, 0x0090, &val);
if (ret)
return ret;
aiccrejStatus = (val & 0xf0) >> 4; aiccrejStatus = (val & 0xf0) >> 4;
lg_dbg("snrRef=%d mainStrong=%d aiccrejStatus=%d currChDiffACQ=0x%x\n", lg_dbg("snrRef=%d mainStrong=%d aiccrejStatus=%d currChDiffACQ=0x%x\n",
...@@ -1221,30 +1271,50 @@ static void lgdt3306a_pre_monitoring(struct lgdt3306a_state *state) ...@@ -1221,30 +1271,50 @@ static void lgdt3306a_pre_monitoring(struct lgdt3306a_state *state)
#endif #endif
if (mainStrong == 0) { if (mainStrong == 0) {
ret = lgdt3306a_read_reg(state, 0x2135, &val); ret = lgdt3306a_read_reg(state, 0x2135, &val);
if (ret)
return ret;
val &= 0x0f; val &= 0x0f;
val |= 0xa0; val |= 0xa0;
ret = lgdt3306a_write_reg(state, 0x2135, val); ret = lgdt3306a_write_reg(state, 0x2135, val);
if (ret)
return ret;
ret = lgdt3306a_read_reg(state, 0x2141, &val); ret = lgdt3306a_read_reg(state, 0x2141, &val);
if (ret)
return ret;
val &= 0x3f; val &= 0x3f;
val |= 0x80; val |= 0x80;
ret = lgdt3306a_write_reg(state, 0x2141, val); ret = lgdt3306a_write_reg(state, 0x2141, val);
if (ret)
return ret;
ret = lgdt3306a_write_reg(state, 0x2122, 0x70); ret = lgdt3306a_write_reg(state, 0x2122, 0x70);
if (ret)
return ret;
} else { /* Weak ghost or static channel */ } else { /* Weak ghost or static channel */
ret = lgdt3306a_read_reg(state, 0x2135, &val); ret = lgdt3306a_read_reg(state, 0x2135, &val);
if (ret)
return ret;
val &= 0x0f; val &= 0x0f;
val |= 0x70; val |= 0x70;
ret = lgdt3306a_write_reg(state, 0x2135, val); ret = lgdt3306a_write_reg(state, 0x2135, val);
if (ret)
return ret;
ret = lgdt3306a_read_reg(state, 0x2141, &val); ret = lgdt3306a_read_reg(state, 0x2141, &val);
if (ret)
return ret;
val &= 0x3f; val &= 0x3f;
val |= 0x40; val |= 0x40;
ret = lgdt3306a_write_reg(state, 0x2141, val); ret = lgdt3306a_write_reg(state, 0x2141, val);
if (ret)
return ret;
ret = lgdt3306a_write_reg(state, 0x2122, 0x40); ret = lgdt3306a_write_reg(state, 0x2122, 0x40);
if (ret)
return ret;
} }
return 0;
} }
static enum lgdt3306a_lock_status lgdt3306a_sync_lock_poll(struct lgdt3306a_state *state) static enum lgdt3306a_lock_status lgdt3306a_sync_lock_poll(struct lgdt3306a_state *state)
...@@ -1310,6 +1380,8 @@ static u8 lgdt3306a_get_packet_error(struct lgdt3306a_state *state) ...@@ -1310,6 +1380,8 @@ static u8 lgdt3306a_get_packet_error(struct lgdt3306a_state *state)
int ret; int ret;
ret = lgdt3306a_read_reg(state, 0x00fa, &val); ret = lgdt3306a_read_reg(state, 0x00fa, &val);
if (ret)
return ret;
return val; return val;
} }
...@@ -1393,7 +1465,9 @@ static enum lgdt3306a_lock_status lgdt3306a_vsb_lock_poll(struct lgdt3306a_state ...@@ -1393,7 +1465,9 @@ static enum lgdt3306a_lock_status lgdt3306a_vsb_lock_poll(struct lgdt3306a_state
return LG3306_UNLOCK; return LG3306_UNLOCK;
} else { } else {
msleep(20); msleep(20);
lgdt3306a_pre_monitoring(state); ret = lgdt3306a_pre_monitoring(state);
if (ret)
return LG3306_UNLOCK;
packet_error = lgdt3306a_get_packet_error(state); packet_error = lgdt3306a_get_packet_error(state);
snr = lgdt3306a_calculate_snr_x100(state); snr = lgdt3306a_calculate_snr_x100(state);
...@@ -1483,7 +1557,7 @@ static int lgdt3306a_read_status(struct dvb_frontend *fe, fe_status_t *status) ...@@ -1483,7 +1557,7 @@ static int lgdt3306a_read_status(struct dvb_frontend *fe, fe_status_t *status)
*status |= FE_HAS_LOCK; *status |= FE_HAS_LOCK;
lgdt3306a_monitor_vsb(state); ret = lgdt3306a_monitor_vsb(state);
} }
break; break;
default: default:
......
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