5.15-stable review patch. If anyone has any objections, please let me know.
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From: Hans Verkuil hverkuil-cisco@xs4all.nl
[ Upstream commit e2ed5024ac2bc27d4bfc99fd58f5ab54de8fa965 ]
Use call_(void_)op consistently in the CEC core framework. Ditto for the cec pin ops. And check if !adap->devnode.unregistered before calling each op. This avoids calls to ops when the device has been unregistered and the underlying hardware may be gone.
Signed-off-by: Hans Verkuil hverkuil-cisco@xs4all.nl Signed-off-by: Mauro Carvalho Chehab mchehab@kernel.org Stable-dep-of: 47c82aac10a6 ("media: cec: core: avoid recursive cec_claim_log_addrs") Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/media/cec/core/cec-adap.c | 37 ++++++++++----------------- drivers/media/cec/core/cec-api.c | 6 +++-- drivers/media/cec/core/cec-core.c | 4 +-- drivers/media/cec/core/cec-pin-priv.h | 11 ++++++++ drivers/media/cec/core/cec-pin.c | 23 ++++++++--------- drivers/media/cec/core/cec-priv.h | 10 ++++++++ 6 files changed, 51 insertions(+), 40 deletions(-)
diff --git a/drivers/media/cec/core/cec-adap.c b/drivers/media/cec/core/cec-adap.c index 297842398cf30..f53d0de176d85 100644 --- a/drivers/media/cec/core/cec-adap.c +++ b/drivers/media/cec/core/cec-adap.c @@ -39,15 +39,6 @@ static void cec_fill_msg_report_features(struct cec_adapter *adap, */ #define CEC_XFER_TIMEOUT_MS (5 * 400 + 100)
-#define call_op(adap, op, arg...) \ - (adap->ops->op ? adap->ops->op(adap, ## arg) : 0) - -#define call_void_op(adap, op, arg...) \ - do { \ - if (adap->ops->op) \ - adap->ops->op(adap, ## arg); \ - } while (0) - static int cec_log_addr2idx(const struct cec_adapter *adap, u8 log_addr) { int i; @@ -405,9 +396,9 @@ static void cec_data_cancel(struct cec_data *data, u8 tx_status, u8 rx_status) /* Queue transmitted message for monitoring purposes */ cec_queue_msg_monitor(adap, &data->msg, 1);
- if (!data->blocking && data->msg.sequence && adap->ops->received) + if (!data->blocking && data->msg.sequence) /* Allow drivers to process the message first */ - adap->ops->received(adap, &data->msg); + call_op(adap, received, &data->msg);
cec_data_completed(data); } @@ -584,8 +575,8 @@ int cec_thread_func(void *_adap)
adap->transmit_in_progress_aborted = false; /* Tell the adapter to transmit, cancel on error */ - if (adap->ops->adap_transmit(adap, data->attempts, - signal_free_time, &data->msg)) + if (call_op(adap, adap_transmit, data->attempts, + signal_free_time, &data->msg)) cec_data_cancel(data, CEC_TX_STATUS_ABORTED, 0); else adap->transmit_in_progress = true; @@ -1311,7 +1302,7 @@ static int cec_config_log_addr(struct cec_adapter *adap, * Message not acknowledged, so this logical * address is free to use. */ - err = adap->ops->adap_log_addr(adap, log_addr); + err = call_op(adap, adap_log_addr, log_addr); if (err) return err;
@@ -1328,9 +1319,8 @@ static int cec_config_log_addr(struct cec_adapter *adap, */ static void cec_adap_unconfigure(struct cec_adapter *adap) { - if (!adap->needs_hpd || - adap->phys_addr != CEC_PHYS_ADDR_INVALID) - WARN_ON(adap->ops->adap_log_addr(adap, CEC_LOG_ADDR_INVALID)); + if (!adap->needs_hpd || adap->phys_addr != CEC_PHYS_ADDR_INVALID) + WARN_ON(call_op(adap, adap_log_addr, CEC_LOG_ADDR_INVALID)); adap->log_addrs.log_addr_mask = 0; adap->is_configured = false; cec_flush(adap); @@ -1573,7 +1563,7 @@ static int cec_activate_cnt_inc(struct cec_adapter *adap) mutex_lock(&adap->devnode.lock); adap->last_initiator = 0xff; adap->transmit_in_progress = false; - ret = adap->ops->adap_enable(adap, true); + ret = call_op(adap, adap_enable, true); if (ret) adap->activate_cnt--; mutex_unlock(&adap->devnode.lock); @@ -1590,7 +1580,7 @@ static void cec_activate_cnt_dec(struct cec_adapter *adap)
/* serialize adap_enable */ mutex_lock(&adap->devnode.lock); - WARN_ON(adap->ops->adap_enable(adap, false)); + WARN_ON(call_op(adap, adap_enable, false)); adap->last_initiator = 0xff; adap->transmit_in_progress = false; adap->transmit_in_progress_aborted = false; @@ -1964,11 +1954,10 @@ static int cec_receive_notify(struct cec_adapter *adap, struct cec_msg *msg, msg->msg[1] != CEC_MSG_CDC_MESSAGE) return 0;
- if (adap->ops->received) { - /* Allow drivers to process the message first */ - if (adap->ops->received(adap, msg) != -ENOMSG) - return 0; - } + /* Allow drivers to process the message first */ + if (adap->ops->received && !adap->devnode.unregistered && + adap->ops->received(adap, msg) != -ENOMSG) + return 0;
/* * REPORT_PHYSICAL_ADDR, CEC_MSG_USER_CONTROL_PRESSED and diff --git a/drivers/media/cec/core/cec-api.c b/drivers/media/cec/core/cec-api.c index 398eeacf1eb59..a44cd1484a13c 100644 --- a/drivers/media/cec/core/cec-api.c +++ b/drivers/media/cec/core/cec-api.c @@ -595,7 +595,8 @@ static int cec_open(struct inode *inode, struct file *filp) adap->conn_info.type != CEC_CONNECTOR_TYPE_NO_CONNECTOR; cec_queue_event_fh(fh, &ev, 0); #ifdef CONFIG_CEC_PIN - if (adap->pin && adap->pin->ops->read_hpd) { + if (adap->pin && adap->pin->ops->read_hpd && + !adap->devnode.unregistered) { err = adap->pin->ops->read_hpd(adap); if (err >= 0) { ev.event = err ? CEC_EVENT_PIN_HPD_HIGH : @@ -603,7 +604,8 @@ static int cec_open(struct inode *inode, struct file *filp) cec_queue_event_fh(fh, &ev, 0); } } - if (adap->pin && adap->pin->ops->read_5v) { + if (adap->pin && adap->pin->ops->read_5v && + !adap->devnode.unregistered) { err = adap->pin->ops->read_5v(adap); if (err >= 0) { ev.event = err ? CEC_EVENT_PIN_5V_HIGH : diff --git a/drivers/media/cec/core/cec-core.c b/drivers/media/cec/core/cec-core.c index ec67065d52021..34f1631b77098 100644 --- a/drivers/media/cec/core/cec-core.c +++ b/drivers/media/cec/core/cec-core.c @@ -204,7 +204,7 @@ static ssize_t cec_error_inj_write(struct file *file, line = strsep(&p, "\n"); if (!*line || *line == '#') continue; - if (!adap->ops->error_inj_parse_line(adap, line)) { + if (!call_op(adap, error_inj_parse_line, line)) { kfree(buf); return -EINVAL; } @@ -217,7 +217,7 @@ static int cec_error_inj_show(struct seq_file *sf, void *unused) { struct cec_adapter *adap = sf->private;
- return adap->ops->error_inj_show(adap, sf); + return call_op(adap, error_inj_show, sf); }
static int cec_error_inj_open(struct inode *inode, struct file *file) diff --git a/drivers/media/cec/core/cec-pin-priv.h b/drivers/media/cec/core/cec-pin-priv.h index fb101f15865c8..e7d63f6acb300 100644 --- a/drivers/media/cec/core/cec-pin-priv.h +++ b/drivers/media/cec/core/cec-pin-priv.h @@ -12,6 +12,17 @@ #include <linux/atomic.h> #include <media/cec-pin.h>
+#define call_pin_op(pin, op, arg...) \ + ((pin && pin->ops->op && !pin->adap->devnode.unregistered) ? \ + pin->ops->op(pin->adap, ## arg) : 0) + +#define call_void_pin_op(pin, op, arg...) \ + do { \ + if (pin && pin->ops->op && \ + !pin->adap->devnode.unregistered) \ + pin->ops->op(pin->adap, ## arg); \ + } while (0) + enum cec_pin_state { /* CEC is off */ CEC_ST_OFF, diff --git a/drivers/media/cec/core/cec-pin.c b/drivers/media/cec/core/cec-pin.c index 0eb90cc0ffb0f..99e69c49e0c9e 100644 --- a/drivers/media/cec/core/cec-pin.c +++ b/drivers/media/cec/core/cec-pin.c @@ -135,7 +135,7 @@ static void cec_pin_update(struct cec_pin *pin, bool v, bool force)
static bool cec_pin_read(struct cec_pin *pin) { - bool v = pin->ops->read(pin->adap); + bool v = call_pin_op(pin, read);
cec_pin_update(pin, v, false); return v; @@ -143,13 +143,13 @@ static bool cec_pin_read(struct cec_pin *pin)
static void cec_pin_low(struct cec_pin *pin) { - pin->ops->low(pin->adap); + call_void_pin_op(pin, low); cec_pin_update(pin, false, false); }
static bool cec_pin_high(struct cec_pin *pin) { - pin->ops->high(pin->adap); + call_void_pin_op(pin, high); return cec_pin_read(pin); }
@@ -1086,7 +1086,7 @@ static int cec_pin_thread_func(void *_adap) CEC_PIN_IRQ_UNCHANGED)) { case CEC_PIN_IRQ_DISABLE: if (irq_enabled) { - pin->ops->disable_irq(adap); + call_void_pin_op(pin, disable_irq); irq_enabled = false; } cec_pin_high(pin); @@ -1097,7 +1097,7 @@ static int cec_pin_thread_func(void *_adap) case CEC_PIN_IRQ_ENABLE: if (irq_enabled) break; - pin->enable_irq_failed = !pin->ops->enable_irq(adap); + pin->enable_irq_failed = !call_pin_op(pin, enable_irq); if (pin->enable_irq_failed) { cec_pin_to_idle(pin); hrtimer_start(&pin->timer, ns_to_ktime(0), @@ -1112,8 +1112,8 @@ static int cec_pin_thread_func(void *_adap) if (kthread_should_stop()) break; } - if (pin->ops->disable_irq && irq_enabled) - pin->ops->disable_irq(adap); + if (irq_enabled) + call_void_pin_op(pin, disable_irq); hrtimer_cancel(&pin->timer); cec_pin_read(pin); cec_pin_to_idle(pin); @@ -1208,7 +1208,7 @@ static void cec_pin_adap_status(struct cec_adapter *adap, seq_printf(file, "state: %s\n", states[pin->state].name); seq_printf(file, "tx_bit: %d\n", pin->tx_bit); seq_printf(file, "rx_bit: %d\n", pin->rx_bit); - seq_printf(file, "cec pin: %d\n", pin->ops->read(adap)); + seq_printf(file, "cec pin: %d\n", call_pin_op(pin, read)); seq_printf(file, "cec pin events dropped: %u\n", pin->work_pin_events_dropped_cnt); seq_printf(file, "irq failed: %d\n", pin->enable_irq_failed); @@ -1261,8 +1261,7 @@ static void cec_pin_adap_status(struct cec_adapter *adap, pin->rx_data_bit_too_long_cnt = 0; pin->rx_low_drive_cnt = 0; pin->tx_low_drive_cnt = 0; - if (pin->ops->status) - pin->ops->status(adap, file); + call_void_pin_op(pin, status, file); }
static int cec_pin_adap_monitor_all_enable(struct cec_adapter *adap, @@ -1278,7 +1277,7 @@ static void cec_pin_adap_free(struct cec_adapter *adap) { struct cec_pin *pin = adap->pin;
- if (pin->ops->free) + if (pin && pin->ops->free) pin->ops->free(adap); adap->pin = NULL; kfree(pin); @@ -1288,7 +1287,7 @@ static int cec_pin_received(struct cec_adapter *adap, struct cec_msg *msg) { struct cec_pin *pin = adap->pin;
- if (pin->ops->received) + if (pin->ops->received && !adap->devnode.unregistered) return pin->ops->received(adap, msg); return -ENOMSG; } diff --git a/drivers/media/cec/core/cec-priv.h b/drivers/media/cec/core/cec-priv.h index 9bbd05053d420..b78df931aa74b 100644 --- a/drivers/media/cec/core/cec-priv.h +++ b/drivers/media/cec/core/cec-priv.h @@ -17,6 +17,16 @@ pr_info("cec-%s: " fmt, adap->name, ## arg); \ } while (0)
+#define call_op(adap, op, arg...) \ + ((adap->ops->op && !adap->devnode.unregistered) ? \ + adap->ops->op(adap, ## arg) : 0) + +#define call_void_op(adap, op, arg...) \ + do { \ + if (adap->ops->op && !adap->devnode.unregistered) \ + adap->ops->op(adap, ## arg); \ + } while (0) + /* devnode to cec_adapter */ #define to_cec_adapter(node) container_of(node, struct cec_adapter, devnode)