diff options
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/dvb-frontends/tua6100.c | 22 | ||||
| -rw-r--r-- | drivers/media/rc/bpf-lirc.c | 30 |
2 files changed, 28 insertions, 24 deletions
diff --git a/drivers/media/dvb-frontends/tua6100.c b/drivers/media/dvb-frontends/tua6100.c index f7c3e6be8e4d..2483f614d0e7 100644 --- a/drivers/media/dvb-frontends/tua6100.c +++ b/drivers/media/dvb-frontends/tua6100.c @@ -67,8 +67,8 @@ static int tua6100_set_params(struct dvb_frontend *fe) struct i2c_msg msg1 = { .addr = priv->i2c_address, .flags = 0, .buf = reg1, .len = 4 }; struct i2c_msg msg2 = { .addr = priv->i2c_address, .flags = 0, .buf = reg2, .len = 3 }; -#define _R 4 -#define _P 32 +#define _R_VAL 4 +#define _P_VAL 32 #define _ri 4000000 // setup register 0 @@ -83,14 +83,14 @@ static int tua6100_set_params(struct dvb_frontend *fe) else reg1[1] = 0x0c; - if (_P == 64) + if (_P_VAL == 64) reg1[1] |= 0x40; if (c->frequency >= 1525000) reg1[1] |= 0x80; // register 2 - reg2[1] = (_R >> 8) & 0x03; - reg2[2] = _R; + reg2[1] = (_R_VAL >> 8) & 0x03; + reg2[2] = _R_VAL; if (c->frequency < 1455000) reg2[1] |= 0x1c; else if (c->frequency < 1630000) @@ -102,18 +102,18 @@ static int tua6100_set_params(struct dvb_frontend *fe) * The N divisor ratio (note: c->frequency is in kHz, but we * need it in Hz) */ - prediv = (c->frequency * _R) / (_ri / 1000); - div = prediv / _P; + prediv = (c->frequency * _R_VAL) / (_ri / 1000); + div = prediv / _P_VAL; reg1[1] |= (div >> 9) & 0x03; reg1[2] = div >> 1; reg1[3] = (div << 7); - priv->frequency = ((div * _P) * (_ri / 1000)) / _R; + priv->frequency = ((div * _P_VAL) * (_ri / 1000)) / _R_VAL; // Finally, calculate and store the value for A - reg1[3] |= (prediv - (div*_P)) & 0x7f; + reg1[3] |= (prediv - (div*_P_VAL)) & 0x7f; -#undef _R -#undef _P +#undef _R_VAL +#undef _P_VAL #undef _ri if (fe->ops.i2c_gate_ctrl) diff --git a/drivers/media/rc/bpf-lirc.c b/drivers/media/rc/bpf-lirc.c index ee657003c1a1..0a0ce620e4a2 100644 --- a/drivers/media/rc/bpf-lirc.c +++ b/drivers/media/rc/bpf-lirc.c @@ -8,6 +8,9 @@ #include <linux/bpf_lirc.h> #include "rc-core-priv.h" +#define lirc_rcu_dereference(p) \ + rcu_dereference_protected(p, lockdep_is_held(&ir_raw_handler_lock)) + /* * BPF interface for raw IR */ @@ -136,7 +139,7 @@ const struct bpf_verifier_ops lirc_mode2_verifier_ops = { static int lirc_bpf_attach(struct rc_dev *rcdev, struct bpf_prog *prog) { - struct bpf_prog_array __rcu *old_array; + struct bpf_prog_array *old_array; struct bpf_prog_array *new_array; struct ir_raw_event_ctrl *raw; int ret; @@ -154,12 +157,12 @@ static int lirc_bpf_attach(struct rc_dev *rcdev, struct bpf_prog *prog) goto unlock; } - if (raw->progs && bpf_prog_array_length(raw->progs) >= BPF_MAX_PROGS) { + old_array = lirc_rcu_dereference(raw->progs); + if (old_array && bpf_prog_array_length(old_array) >= BPF_MAX_PROGS) { ret = -E2BIG; goto unlock; } - old_array = raw->progs; ret = bpf_prog_array_copy(old_array, NULL, prog, &new_array); if (ret < 0) goto unlock; @@ -174,7 +177,7 @@ unlock: static int lirc_bpf_detach(struct rc_dev *rcdev, struct bpf_prog *prog) { - struct bpf_prog_array __rcu *old_array; + struct bpf_prog_array *old_array; struct bpf_prog_array *new_array; struct ir_raw_event_ctrl *raw; int ret; @@ -192,7 +195,7 @@ static int lirc_bpf_detach(struct rc_dev *rcdev, struct bpf_prog *prog) goto unlock; } - old_array = raw->progs; + old_array = lirc_rcu_dereference(raw->progs); ret = bpf_prog_array_copy(old_array, prog, NULL, &new_array); /* * Do not use bpf_prog_array_delete_safe() as we would end up @@ -223,21 +226,22 @@ void lirc_bpf_run(struct rc_dev *rcdev, u32 sample) /* * This should be called once the rc thread has been stopped, so there can be * no concurrent bpf execution. + * + * Should be called with the ir_raw_handler_lock held. */ void lirc_bpf_free(struct rc_dev *rcdev) { struct bpf_prog_array_item *item; + struct bpf_prog_array *array; - if (!rcdev->raw->progs) + array = lirc_rcu_dereference(rcdev->raw->progs); + if (!array) return; - item = rcu_dereference(rcdev->raw->progs)->items; - while (item->prog) { + for (item = array->items; item->prog; item++) bpf_prog_put(item->prog); - item++; - } - bpf_prog_array_free(rcdev->raw->progs); + bpf_prog_array_free(array); } int lirc_prog_attach(const union bpf_attr *attr, struct bpf_prog *prog) @@ -290,7 +294,7 @@ int lirc_prog_detach(const union bpf_attr *attr) int lirc_prog_query(const union bpf_attr *attr, union bpf_attr __user *uattr) { __u32 __user *prog_ids = u64_to_user_ptr(attr->query.prog_ids); - struct bpf_prog_array __rcu *progs; + struct bpf_prog_array *progs; struct rc_dev *rcdev; u32 cnt, flags = 0; int ret; @@ -311,7 +315,7 @@ int lirc_prog_query(const union bpf_attr *attr, union bpf_attr __user *uattr) if (ret) goto put; - progs = rcdev->raw->progs; + progs = lirc_rcu_dereference(rcdev->raw->progs); cnt = progs ? bpf_prog_array_length(progs) : 0; if (copy_to_user(&uattr->query.prog_cnt, &cnt, sizeof(cnt))) { |