mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-11-01 00:48:50 +00:00
3f037426d6
Remove useless kfree() and clean up code related to the removal. The semantic patch that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @r exists@ position p1,p2; expression x; @@ if (x@p1 == NULL) { ... kfree@p2(x); ... return ...; } @unchanged exists@ position r.p1,r.p2; expression e <= r.x,x,e1; iterator I; statement S; @@ if (x@p1 == NULL) { ... when != I(x,...) S when != e = e1 when != e += e1 when != e -= e1 when != ++e when != --e when != e++ when != e-- when != &e kfree@p2(x); ... return ...; } @ok depends on unchanged exists@ position any r.p1; position r.p2; expression x; @@ ... when != true x@p1 == NULL kfree@p2(x); @depends on !ok && unchanged@ position r.p2; expression x; @@ *kfree@p2(x); // </smpl> Signed-off-by: Peter Senna Tschudin <peter.senna@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
267 lines
6.8 KiB
C
267 lines
6.8 KiB
C
/*
|
|
* Driver for Dummy Frontend
|
|
*
|
|
* Written by Emard <emard@softhome.net>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
*
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.=
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/string.h>
|
|
#include <linux/slab.h>
|
|
|
|
#include "dvb_frontend.h"
|
|
#include "dvb_dummy_fe.h"
|
|
|
|
|
|
struct dvb_dummy_fe_state {
|
|
struct dvb_frontend frontend;
|
|
};
|
|
|
|
|
|
static int dvb_dummy_fe_read_status(struct dvb_frontend* fe, fe_status_t* status)
|
|
{
|
|
*status = FE_HAS_SIGNAL
|
|
| FE_HAS_CARRIER
|
|
| FE_HAS_VITERBI
|
|
| FE_HAS_SYNC
|
|
| FE_HAS_LOCK;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dvb_dummy_fe_read_ber(struct dvb_frontend* fe, u32* ber)
|
|
{
|
|
*ber = 0;
|
|
return 0;
|
|
}
|
|
|
|
static int dvb_dummy_fe_read_signal_strength(struct dvb_frontend* fe, u16* strength)
|
|
{
|
|
*strength = 0;
|
|
return 0;
|
|
}
|
|
|
|
static int dvb_dummy_fe_read_snr(struct dvb_frontend* fe, u16* snr)
|
|
{
|
|
*snr = 0;
|
|
return 0;
|
|
}
|
|
|
|
static int dvb_dummy_fe_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
|
|
{
|
|
*ucblocks = 0;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Only needed if it actually reads something from the hardware
|
|
*/
|
|
static int dvb_dummy_fe_get_frontend(struct dvb_frontend *fe)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int dvb_dummy_fe_set_frontend(struct dvb_frontend *fe)
|
|
{
|
|
if (fe->ops.tuner_ops.set_params) {
|
|
fe->ops.tuner_ops.set_params(fe);
|
|
if (fe->ops.i2c_gate_ctrl)
|
|
fe->ops.i2c_gate_ctrl(fe, 0);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dvb_dummy_fe_sleep(struct dvb_frontend* fe)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int dvb_dummy_fe_init(struct dvb_frontend* fe)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int dvb_dummy_fe_set_tone(struct dvb_frontend* fe, fe_sec_tone_mode_t tone)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int dvb_dummy_fe_set_voltage(struct dvb_frontend* fe, fe_sec_voltage_t voltage)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static void dvb_dummy_fe_release(struct dvb_frontend* fe)
|
|
{
|
|
struct dvb_dummy_fe_state* state = fe->demodulator_priv;
|
|
kfree(state);
|
|
}
|
|
|
|
static struct dvb_frontend_ops dvb_dummy_fe_ofdm_ops;
|
|
|
|
struct dvb_frontend* dvb_dummy_fe_ofdm_attach(void)
|
|
{
|
|
struct dvb_dummy_fe_state* state = NULL;
|
|
|
|
/* allocate memory for the internal state */
|
|
state = kzalloc(sizeof(struct dvb_dummy_fe_state), GFP_KERNEL);
|
|
if (!state)
|
|
return NULL;
|
|
|
|
/* create dvb_frontend */
|
|
memcpy(&state->frontend.ops, &dvb_dummy_fe_ofdm_ops, sizeof(struct dvb_frontend_ops));
|
|
state->frontend.demodulator_priv = state;
|
|
return &state->frontend;
|
|
}
|
|
|
|
static struct dvb_frontend_ops dvb_dummy_fe_qpsk_ops;
|
|
|
|
struct dvb_frontend *dvb_dummy_fe_qpsk_attach(void)
|
|
{
|
|
struct dvb_dummy_fe_state* state = NULL;
|
|
|
|
/* allocate memory for the internal state */
|
|
state = kzalloc(sizeof(struct dvb_dummy_fe_state), GFP_KERNEL);
|
|
if (!state)
|
|
return NULL;
|
|
|
|
/* create dvb_frontend */
|
|
memcpy(&state->frontend.ops, &dvb_dummy_fe_qpsk_ops, sizeof(struct dvb_frontend_ops));
|
|
state->frontend.demodulator_priv = state;
|
|
return &state->frontend;
|
|
}
|
|
|
|
static struct dvb_frontend_ops dvb_dummy_fe_qam_ops;
|
|
|
|
struct dvb_frontend *dvb_dummy_fe_qam_attach(void)
|
|
{
|
|
struct dvb_dummy_fe_state* state = NULL;
|
|
|
|
/* allocate memory for the internal state */
|
|
state = kzalloc(sizeof(struct dvb_dummy_fe_state), GFP_KERNEL);
|
|
if (!state)
|
|
return NULL;
|
|
|
|
/* create dvb_frontend */
|
|
memcpy(&state->frontend.ops, &dvb_dummy_fe_qam_ops, sizeof(struct dvb_frontend_ops));
|
|
state->frontend.demodulator_priv = state;
|
|
return &state->frontend;
|
|
}
|
|
|
|
static struct dvb_frontend_ops dvb_dummy_fe_ofdm_ops = {
|
|
.delsys = { SYS_DVBT },
|
|
.info = {
|
|
.name = "Dummy DVB-T",
|
|
.frequency_min = 0,
|
|
.frequency_max = 863250000,
|
|
.frequency_stepsize = 62500,
|
|
.caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
|
|
FE_CAN_FEC_4_5 | FE_CAN_FEC_5_6 | FE_CAN_FEC_6_7 |
|
|
FE_CAN_FEC_7_8 | FE_CAN_FEC_8_9 | FE_CAN_FEC_AUTO |
|
|
FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO |
|
|
FE_CAN_TRANSMISSION_MODE_AUTO |
|
|
FE_CAN_GUARD_INTERVAL_AUTO |
|
|
FE_CAN_HIERARCHY_AUTO,
|
|
},
|
|
|
|
.release = dvb_dummy_fe_release,
|
|
|
|
.init = dvb_dummy_fe_init,
|
|
.sleep = dvb_dummy_fe_sleep,
|
|
|
|
.set_frontend = dvb_dummy_fe_set_frontend,
|
|
.get_frontend = dvb_dummy_fe_get_frontend,
|
|
|
|
.read_status = dvb_dummy_fe_read_status,
|
|
.read_ber = dvb_dummy_fe_read_ber,
|
|
.read_signal_strength = dvb_dummy_fe_read_signal_strength,
|
|
.read_snr = dvb_dummy_fe_read_snr,
|
|
.read_ucblocks = dvb_dummy_fe_read_ucblocks,
|
|
};
|
|
|
|
static struct dvb_frontend_ops dvb_dummy_fe_qam_ops = {
|
|
.delsys = { SYS_DVBC_ANNEX_A },
|
|
.info = {
|
|
.name = "Dummy DVB-C",
|
|
.frequency_stepsize = 62500,
|
|
.frequency_min = 51000000,
|
|
.frequency_max = 858000000,
|
|
.symbol_rate_min = (57840000/2)/64, /* SACLK/64 == (XIN/2)/64 */
|
|
.symbol_rate_max = (57840000/2)/4, /* SACLK/4 */
|
|
.caps = FE_CAN_QAM_16 | FE_CAN_QAM_32 | FE_CAN_QAM_64 |
|
|
FE_CAN_QAM_128 | FE_CAN_QAM_256 |
|
|
FE_CAN_FEC_AUTO | FE_CAN_INVERSION_AUTO
|
|
},
|
|
|
|
.release = dvb_dummy_fe_release,
|
|
|
|
.init = dvb_dummy_fe_init,
|
|
.sleep = dvb_dummy_fe_sleep,
|
|
|
|
.set_frontend = dvb_dummy_fe_set_frontend,
|
|
.get_frontend = dvb_dummy_fe_get_frontend,
|
|
|
|
.read_status = dvb_dummy_fe_read_status,
|
|
.read_ber = dvb_dummy_fe_read_ber,
|
|
.read_signal_strength = dvb_dummy_fe_read_signal_strength,
|
|
.read_snr = dvb_dummy_fe_read_snr,
|
|
.read_ucblocks = dvb_dummy_fe_read_ucblocks,
|
|
};
|
|
|
|
static struct dvb_frontend_ops dvb_dummy_fe_qpsk_ops = {
|
|
.delsys = { SYS_DVBS },
|
|
.info = {
|
|
.name = "Dummy DVB-S",
|
|
.frequency_min = 950000,
|
|
.frequency_max = 2150000,
|
|
.frequency_stepsize = 250, /* kHz for QPSK frontends */
|
|
.frequency_tolerance = 29500,
|
|
.symbol_rate_min = 1000000,
|
|
.symbol_rate_max = 45000000,
|
|
.caps = FE_CAN_INVERSION_AUTO |
|
|
FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
|
|
FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
|
|
FE_CAN_QPSK
|
|
},
|
|
|
|
.release = dvb_dummy_fe_release,
|
|
|
|
.init = dvb_dummy_fe_init,
|
|
.sleep = dvb_dummy_fe_sleep,
|
|
|
|
.set_frontend = dvb_dummy_fe_set_frontend,
|
|
.get_frontend = dvb_dummy_fe_get_frontend,
|
|
|
|
.read_status = dvb_dummy_fe_read_status,
|
|
.read_ber = dvb_dummy_fe_read_ber,
|
|
.read_signal_strength = dvb_dummy_fe_read_signal_strength,
|
|
.read_snr = dvb_dummy_fe_read_snr,
|
|
.read_ucblocks = dvb_dummy_fe_read_ucblocks,
|
|
|
|
.set_voltage = dvb_dummy_fe_set_voltage,
|
|
.set_tone = dvb_dummy_fe_set_tone,
|
|
};
|
|
|
|
MODULE_DESCRIPTION("DVB DUMMY Frontend");
|
|
MODULE_AUTHOR("Emard");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
EXPORT_SYMBOL(dvb_dummy_fe_ofdm_attach);
|
|
EXPORT_SYMBOL(dvb_dummy_fe_qam_attach);
|
|
EXPORT_SYMBOL(dvb_dummy_fe_qpsk_attach);
|