diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2020-06-04 06:59:38 +0300 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-06-04 06:59:38 +0300 |
commit | a98f670e41a99f53acb1fb33cee9c6abbb2e6f23 (patch) | |
tree | f8ae10a4cb91758ad7f9422053753a8c5d0f04dc /drivers/media/cec/core/cec-api.c | |
parent | ee01c4d72adffb7d424535adf630f2955748fa8b (diff) | |
parent | 938b29db3aa9c293c7c1366b16e55e308f1a1ddd (diff) | |
download | linux-a98f670e41a99f53acb1fb33cee9c6abbb2e6f23.tar.xz |
Merge tag 'media/v5.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media
Pull media updates from Mauro Carvalho Chehab:
- Media documentation is now split into admin-guide, driver-api and
userspace-api books (a longstanding request from Jon);
- The media Kconfig was reorganized, in order to make easier to select
drivers and their dependencies;
- The testing drivers now has a separate directory;
- added a new driver for Rockchip Video Decoder IP;
- The atomisp staging driver was resurrected. It is meant to work with
4 generations of cameras on Atom-based laptops, tablets and cell
phones. So, it seems worth investing time to cleanup this driver and
making it in good shape.
- Added some V4L2 core ancillary routines to help with h264 codecs;
- Added an ov2740 image sensor driver;
- The si2157 gained support for Analog TV, which, in turn, added
support for some cx231xx and cx23885 boards to also support analog
standards;
- Added some V4L2 controls (V4L2_CID_CAMERA_ORIENTATION and
V4L2_CID_CAMERA_SENSOR_ROTATION) to help identifying where the camera
is located at the device;
- VIDIOC_ENUM_FMT was extended to support MC-centric devices;
- Lots of drivers improvements and cleanups.
* tag 'media/v5.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (503 commits)
media: Documentation: media: Refer to mbus format documentation from CSI-2 docs
media: s5k5baf: Replace zero-length array with flexible-array
media: i2c: imx219: Drop <linux/clk-provider.h> and <linux/clkdev.h>
media: i2c: Add ov2740 image sensor driver
media: ov8856: Implement sensor module revision identification
media: ov8856: Add devicetree support
media: dt-bindings: ov8856: Document YAML bindings
media: dvb-usb: Add Cinergy S2 PCIe Dual Port support
media: dvbdev: Fix tuner->demod media controller link
media: dt-bindings: phy: phy-rockchip-dphy-rx0: move rockchip dphy rx0 bindings out of staging
media: staging: dt-bindings: phy-rockchip-dphy-rx0: remove non-used reg property
media: atomisp: unify the version for isp2401 a0 and b0 versions
media: atomisp: update TODO with the current data
media: atomisp: adjust some code at sh_css that could be broken
media: atomisp: don't produce errs for ignored IRQs
media: atomisp: print IRQ when debugging
media: atomisp: isp_mmu: don't use kmem_cache
media: atomisp: add a notice about possible leak resources
media: atomisp: disable the dynamic and reserved pools
media: atomisp: turn on camera before setting it
...
Diffstat (limited to 'drivers/media/cec/core/cec-api.c')
-rw-r--r-- | drivers/media/cec/core/cec-api.c | 701 |
1 files changed, 701 insertions, 0 deletions
diff --git a/drivers/media/cec/core/cec-api.c b/drivers/media/cec/core/cec-api.c new file mode 100644 index 000000000000..17d1cb2e5f97 --- /dev/null +++ b/drivers/media/cec/core/cec-api.c @@ -0,0 +1,701 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * cec-api.c - HDMI Consumer Electronics Control framework - API + * + * Copyright 2016 Cisco Systems, Inc. and/or its affiliates. All rights reserved. + */ + +#include <linux/errno.h> +#include <linux/init.h> +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/kmod.h> +#include <linux/ktime.h> +#include <linux/slab.h> +#include <linux/mm.h> +#include <linux/string.h> +#include <linux/types.h> +#include <linux/uaccess.h> +#include <linux/version.h> + +#include <media/cec-pin.h> +#include "cec-priv.h" +#include "cec-pin-priv.h" + +static inline struct cec_devnode *cec_devnode_data(struct file *filp) +{ + struct cec_fh *fh = filp->private_data; + + return &fh->adap->devnode; +} + +/* CEC file operations */ + +static __poll_t cec_poll(struct file *filp, + struct poll_table_struct *poll) +{ + struct cec_fh *fh = filp->private_data; + struct cec_adapter *adap = fh->adap; + __poll_t res = 0; + + poll_wait(filp, &fh->wait, poll); + if (!cec_is_registered(adap)) + return EPOLLERR | EPOLLHUP; + mutex_lock(&adap->lock); + if (adap->is_configured && + adap->transmit_queue_sz < CEC_MAX_MSG_TX_QUEUE_SZ) + res |= EPOLLOUT | EPOLLWRNORM; + if (fh->queued_msgs) + res |= EPOLLIN | EPOLLRDNORM; + if (fh->total_queued_events) + res |= EPOLLPRI; + mutex_unlock(&adap->lock); + return res; +} + +static bool cec_is_busy(const struct cec_adapter *adap, + const struct cec_fh *fh) +{ + bool valid_initiator = adap->cec_initiator && adap->cec_initiator == fh; + bool valid_follower = adap->cec_follower && adap->cec_follower == fh; + + /* + * Exclusive initiators and followers can always access the CEC adapter + */ + if (valid_initiator || valid_follower) + return false; + /* + * All others can only access the CEC adapter if there is no + * exclusive initiator and they are in INITIATOR mode. + */ + return adap->cec_initiator || + fh->mode_initiator == CEC_MODE_NO_INITIATOR; +} + +static long cec_adap_g_caps(struct cec_adapter *adap, + struct cec_caps __user *parg) +{ + struct cec_caps caps = {}; + + strscpy(caps.driver, adap->devnode.dev.parent->driver->name, + sizeof(caps.driver)); + strscpy(caps.name, adap->name, sizeof(caps.name)); + caps.available_log_addrs = adap->available_log_addrs; + caps.capabilities = adap->capabilities; + caps.version = LINUX_VERSION_CODE; + if (copy_to_user(parg, &caps, sizeof(caps))) + return -EFAULT; + return 0; +} + +static long cec_adap_g_phys_addr(struct cec_adapter *adap, + __u16 __user *parg) +{ + u16 phys_addr; + + mutex_lock(&adap->lock); + phys_addr = adap->phys_addr; + mutex_unlock(&adap->lock); + if (copy_to_user(parg, &phys_addr, sizeof(phys_addr))) + return -EFAULT; + return 0; +} + +static int cec_validate_phys_addr(u16 phys_addr) +{ + int i; + + if (phys_addr == CEC_PHYS_ADDR_INVALID) + return 0; + for (i = 0; i < 16; i += 4) + if (phys_addr & (0xf << i)) + break; + if (i == 16) + return 0; + for (i += 4; i < 16; i += 4) + if ((phys_addr & (0xf << i)) == 0) + return -EINVAL; + return 0; +} + +static long cec_adap_s_phys_addr(struct cec_adapter *adap, struct cec_fh *fh, + bool block, __u16 __user *parg) +{ + u16 phys_addr; + long err; + + if (!(adap->capabilities & CEC_CAP_PHYS_ADDR)) + return -ENOTTY; + if (copy_from_user(&phys_addr, parg, sizeof(phys_addr))) + return -EFAULT; + + err = cec_validate_phys_addr(phys_addr); + if (err) + return err; + mutex_lock(&adap->lock); + if (cec_is_busy(adap, fh)) + err = -EBUSY; + else + __cec_s_phys_addr(adap, phys_addr, block); + mutex_unlock(&adap->lock); + return err; +} + +static long cec_adap_g_log_addrs(struct cec_adapter *adap, + struct cec_log_addrs __user *parg) +{ + struct cec_log_addrs log_addrs; + + mutex_lock(&adap->lock); + log_addrs = adap->log_addrs; + if (!adap->is_configured) + memset(log_addrs.log_addr, CEC_LOG_ADDR_INVALID, + sizeof(log_addrs.log_addr)); + mutex_unlock(&adap->lock); + + if (copy_to_user(parg, &log_addrs, sizeof(log_addrs))) + return -EFAULT; + return 0; +} + +static long cec_adap_s_log_addrs(struct cec_adapter *adap, struct cec_fh *fh, + bool block, struct cec_log_addrs __user *parg) +{ + struct cec_log_addrs log_addrs; + long err = -EBUSY; + + if (!(adap->capabilities & CEC_CAP_LOG_ADDRS)) + return -ENOTTY; + if (copy_from_user(&log_addrs, parg, sizeof(log_addrs))) + return -EFAULT; + log_addrs.flags &= CEC_LOG_ADDRS_FL_ALLOW_UNREG_FALLBACK | + CEC_LOG_ADDRS_FL_ALLOW_RC_PASSTHRU | + CEC_LOG_ADDRS_FL_CDC_ONLY; + mutex_lock(&adap->lock); + if (!adap->is_configuring && + (!log_addrs.num_log_addrs || !adap->is_configured) && + !cec_is_busy(adap, fh)) { + err = __cec_s_log_addrs(adap, &log_addrs, block); + if (!err) + log_addrs = adap->log_addrs; + } + mutex_unlock(&adap->lock); + if (err) + return err; + if (copy_to_user(parg, &log_addrs, sizeof(log_addrs))) + return -EFAULT; + return 0; +} + +static long cec_adap_g_connector_info(struct cec_adapter *adap, + struct cec_log_addrs __user *parg) +{ + int ret = 0; + + if (!(adap->capabilities & CEC_CAP_CONNECTOR_INFO)) + return -ENOTTY; + + mutex_lock(&adap->lock); + if (copy_to_user(parg, &adap->conn_info, sizeof(adap->conn_info))) + ret = -EFAULT; + mutex_unlock(&adap->lock); + return ret; +} + +static long cec_transmit(struct cec_adapter *adap, struct cec_fh *fh, + bool block, struct cec_msg __user *parg) +{ + struct cec_msg msg = {}; + long err = 0; + + if (!(adap->capabilities & CEC_CAP_TRANSMIT)) + return -ENOTTY; + if (copy_from_user(&msg, parg, sizeof(msg))) + return -EFAULT; + + mutex_lock(&adap->lock); + if (adap->log_addrs.num_log_addrs == 0) + err = -EPERM; + else if (adap->is_configuring) + err = -ENONET; + else if (cec_is_busy(adap, fh)) + err = -EBUSY; + else + err = cec_transmit_msg_fh(adap, &msg, fh, block); + mutex_unlock(&adap->lock); + if (err) + return err; + if (copy_to_user(parg, &msg, sizeof(msg))) + return -EFAULT; + return 0; +} + +/* Called by CEC_RECEIVE: wait for a message to arrive */ +static int cec_receive_msg(struct cec_fh *fh, struct cec_msg *msg, bool block) +{ + u32 timeout = msg->timeout; + int res; + + do { + mutex_lock(&fh->lock); + /* Are there received messages queued up? */ + if (fh->queued_msgs) { + /* Yes, return the first one */ + struct cec_msg_entry *entry = + list_first_entry(&fh->msgs, + struct cec_msg_entry, list); + + list_del(&entry->list); + *msg = entry->msg; + kfree(entry); + fh->queued_msgs--; + mutex_unlock(&fh->lock); + /* restore original timeout value */ + msg->timeout = timeout; + return 0; + } + + /* No, return EAGAIN in non-blocking mode or wait */ + mutex_unlock(&fh->lock); + + /* Return when in non-blocking mode */ + if (!block) + return -EAGAIN; + + if (msg->timeout) { + /* The user specified a timeout */ + res = wait_event_interruptible_timeout(fh->wait, + fh->queued_msgs, + msecs_to_jiffies(msg->timeout)); + if (res == 0) + res = -ETIMEDOUT; + else if (res > 0) + res = 0; + } else { + /* Wait indefinitely */ + res = wait_event_interruptible(fh->wait, + fh->queued_msgs); + } + /* Exit on error, otherwise loop to get the new message */ + } while (!res); + return res; +} + +static long cec_receive(struct cec_adapter *adap, struct cec_fh *fh, + bool block, struct cec_msg __user *parg) +{ + struct cec_msg msg = {}; + long err; + + if (copy_from_user(&msg, parg, sizeof(msg))) + return -EFAULT; + + err = cec_receive_msg(fh, &msg, block); + if (err) + return err; + msg.flags = 0; + if (copy_to_user(parg, &msg, sizeof(msg))) + return -EFAULT; + return 0; +} + +static long cec_dqevent(struct cec_adapter *adap, struct cec_fh *fh, + bool block, struct cec_event __user *parg) +{ + struct cec_event_entry *ev = NULL; + u64 ts = ~0ULL; + unsigned int i; + unsigned int ev_idx; + long err = 0; + + mutex_lock(&fh->lock); + while (!fh->total_queued_events && block) { + mutex_unlock(&fh->lock); + err = wait_event_interruptible(fh->wait, + fh->total_queued_events); + if (err) + return err; + mutex_lock(&fh->lock); + } + + /* Find the oldest event */ + for (i = 0; i < CEC_NUM_EVENTS; i++) { + struct cec_event_entry *entry = + list_first_entry_or_null(&fh->events[i], + struct cec_event_entry, list); + + if (entry && entry->ev.ts <= ts) { + ev = entry; + ev_idx = i; + ts = ev->ev.ts; + } + } + + if (!ev) { + err = -EAGAIN; + goto unlock; + } + list_del(&ev->list); + + if (copy_to_user(parg, &ev->ev, sizeof(ev->ev))) + err = -EFAULT; + if (ev_idx >= CEC_NUM_CORE_EVENTS) + kfree(ev); + fh->queued_events[ev_idx]--; + fh->total_queued_events--; + +unlock: + mutex_unlock(&fh->lock); + return err; +} + +static long cec_g_mode(struct cec_adapter *adap, struct cec_fh *fh, + u32 __user *parg) +{ + u32 mode = fh->mode_initiator | fh->mode_follower; + + if (copy_to_user(parg, &mode, sizeof(mode))) + return -EFAULT; + return 0; +} + +static long cec_s_mode(struct cec_adapter *adap, struct cec_fh *fh, + u32 __user *parg) +{ + u32 mode; + u8 mode_initiator; + u8 mode_follower; + bool send_pin_event = false; + long err = 0; + + if (copy_from_user(&mode, parg, sizeof(mode))) + return -EFAULT; + if (mode & ~(CEC_MODE_INITIATOR_MSK | CEC_MODE_FOLLOWER_MSK)) { + dprintk(1, "%s: invalid mode bits set\n", __func__); + return -EINVAL; + } + + mode_initiator = mode & CEC_MODE_INITIATOR_MSK; + mode_follower = mode & CEC_MODE_FOLLOWER_MSK; + + if (mode_initiator > CEC_MODE_EXCL_INITIATOR || + mode_follower > CEC_MODE_MONITOR_ALL) { + dprintk(1, "%s: unknown mode\n", __func__); + return -EINVAL; + } + + if (mode_follower == CEC_MODE_MONITOR_ALL && + !(adap->capabilities & CEC_CAP_MONITOR_ALL)) { + dprintk(1, "%s: MONITOR_ALL not supported\n", __func__); + return -EINVAL; + } + + if (mode_follower == CEC_MODE_MONITOR_PIN && + !(adap->capabilities & CEC_CAP_MONITOR_PIN)) { + dprintk(1, "%s: MONITOR_PIN not supported\n", __func__); + return -EINVAL; + } + + /* Follower modes should always be able to send CEC messages */ + if ((mode_initiator == CEC_MODE_NO_INITIATOR || + !(adap->capabilities & CEC_CAP_TRANSMIT)) && + mode_follower >= CEC_MODE_FOLLOWER && + mode_follower <= CEC_MODE_EXCL_FOLLOWER_PASSTHRU) { + dprintk(1, "%s: cannot transmit\n", __func__); + return -EINVAL; + } + + /* Monitor modes require CEC_MODE_NO_INITIATOR */ + if (mode_initiator && mode_follower >= CEC_MODE_MONITOR_PIN) { + dprintk(1, "%s: monitor modes require NO_INITIATOR\n", + __func__); + return -EINVAL; + } + + /* Monitor modes require CAP_NET_ADMIN */ + if (mode_follower >= CEC_MODE_MONITOR_PIN && !capable(CAP_NET_ADMIN)) + return -EPERM; + + mutex_lock(&adap->lock); + /* + * You can't become exclusive follower if someone else already + * has that job. + */ + if ((mode_follower == CEC_MODE_EXCL_FOLLOWER || + mode_follower == CEC_MODE_EXCL_FOLLOWER_PASSTHRU) && + adap->cec_follower && adap->cec_follower != fh) + err = -EBUSY; + /* + * You can't become exclusive initiator if someone else already + * has that job. + */ + if (mode_initiator == CEC_MODE_EXCL_INITIATOR && + adap->cec_initiator && adap->cec_initiator != fh) + err = -EBUSY; + + if (!err) { + bool old_mon_all = fh->mode_follower == CEC_MODE_MONITOR_ALL; + bool new_mon_all = mode_follower == CEC_MODE_MONITOR_ALL; + + if (old_mon_all != new_mon_all) { + if (new_mon_all) + err = cec_monitor_all_cnt_inc(adap); + else + cec_monitor_all_cnt_dec(adap); + } + } + + if (!err) { + bool old_mon_pin = fh->mode_follower == CEC_MODE_MONITOR_PIN; + bool new_mon_pin = mode_follower == CEC_MODE_MONITOR_PIN; + + if (old_mon_pin != new_mon_pin) { + send_pin_event = new_mon_pin; + if (new_mon_pin) + err = cec_monitor_pin_cnt_inc(adap); + else + cec_monitor_pin_cnt_dec(adap); + } + } + + if (err) { + mutex_unlock(&adap->lock); + return err; + } + + if (fh->mode_follower == CEC_MODE_FOLLOWER) + adap->follower_cnt--; + if (mode_follower == CEC_MODE_FOLLOWER) + adap->follower_cnt++; + if (send_pin_event) { + struct cec_event ev = { + .flags = CEC_EVENT_FL_INITIAL_STATE, + }; + + ev.event = adap->cec_pin_is_high ? CEC_EVENT_PIN_CEC_HIGH : + CEC_EVENT_PIN_CEC_LOW; + cec_queue_event_fh(fh, &ev, 0); + } + if (mode_follower == CEC_MODE_EXCL_FOLLOWER || + mode_follower == CEC_MODE_EXCL_FOLLOWER_PASSTHRU) { + adap->passthrough = + mode_follower == CEC_MODE_EXCL_FOLLOWER_PASSTHRU; + adap->cec_follower = fh; + } else if (adap->cec_follower == fh) { + adap->passthrough = false; + adap->cec_follower = NULL; + } + if (mode_initiator == CEC_MODE_EXCL_INITIATOR) + adap->cec_initiator = fh; + else if (adap->cec_initiator == fh) + adap->cec_initiator = NULL; + fh->mode_initiator = mode_initiator; + fh->mode_follower = mode_follower; + mutex_unlock(&adap->lock); + return 0; +} + +static long cec_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) +{ + struct cec_fh *fh = filp->private_data; + struct cec_adapter *adap = fh->adap; + bool block = !(filp->f_flags & O_NONBLOCK); + void __user *parg = (void __user *)arg; + + if (!cec_is_registered(adap)) + return -ENODEV; + + switch (cmd) { + case CEC_ADAP_G_CAPS: + return cec_adap_g_caps(adap, parg); + + case CEC_ADAP_G_PHYS_ADDR: + return cec_adap_g_phys_addr(adap, parg); + + case CEC_ADAP_S_PHYS_ADDR: + return cec_adap_s_phys_addr(adap, fh, block, parg); + + case CEC_ADAP_G_LOG_ADDRS: + return cec_adap_g_log_addrs(adap, parg); + + case CEC_ADAP_S_LOG_ADDRS: + return cec_adap_s_log_addrs(adap, fh, block, parg); + + case CEC_ADAP_G_CONNECTOR_INFO: + return cec_adap_g_connector_info(adap, parg); + + case CEC_TRANSMIT: + return cec_transmit(adap, fh, block, parg); + + case CEC_RECEIVE: + return cec_receive(adap, fh, block, parg); + + case CEC_DQEVENT: + return cec_dqevent(adap, fh, block, parg); + + case CEC_G_MODE: + return cec_g_mode(adap, fh, parg); + + case CEC_S_MODE: + return cec_s_mode(adap, fh, parg); + + default: + return -ENOTTY; + } +} + +static int cec_open(struct inode *inode, struct file *filp) +{ + struct cec_devnode *devnode = + container_of(inode->i_cdev, struct cec_devnode, cdev); + struct cec_adapter *adap = to_cec_adapter(devnode); + struct cec_fh *fh = kzalloc(sizeof(*fh), GFP_KERNEL); + /* + * Initial events that are automatically sent when the cec device is + * opened. + */ + struct cec_event ev = { + .event = CEC_EVENT_STATE_CHANGE, + .flags = CEC_EVENT_FL_INITIAL_STATE, + }; + unsigned int i; + int err; + + if (!fh) + return -ENOMEM; + + INIT_LIST_HEAD(&fh->msgs); + INIT_LIST_HEAD(&fh->xfer_list); + for (i = 0; i < CEC_NUM_EVENTS; i++) + INIT_LIST_HEAD(&fh->events[i]); + mutex_init(&fh->lock); + init_waitqueue_head(&fh->wait); + + fh->mode_initiator = CEC_MODE_INITIATOR; + fh->adap = adap; + + err = cec_get_device(devnode); + if (err) { + kfree(fh); + return err; + } + + mutex_lock(&devnode->lock); + if (list_empty(&devnode->fhs) && + !adap->needs_hpd && + adap->phys_addr == CEC_PHYS_ADDR_INVALID) { + err = adap->ops->adap_enable(adap, true); + if (err) { + mutex_unlock(&devnode->lock); + kfree(fh); + return err; + } + } + filp->private_data = fh; + + /* Queue up initial state events */ + ev.state_change.phys_addr = adap->phys_addr; + ev.state_change.log_addr_mask = adap->log_addrs.log_addr_mask; + ev.state_change.have_conn_info = + 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) { + err = adap->pin->ops->read_hpd(adap); + if (err >= 0) { + ev.event = err ? CEC_EVENT_PIN_HPD_HIGH : + CEC_EVENT_PIN_HPD_LOW; + cec_queue_event_fh(fh, &ev, 0); + } + } + if (adap->pin && adap->pin->ops->read_5v) { + err = adap->pin->ops->read_5v(adap); + if (err >= 0) { + ev.event = err ? CEC_EVENT_PIN_5V_HIGH : + CEC_EVENT_PIN_5V_LOW; + cec_queue_event_fh(fh, &ev, 0); + } + } +#endif + + list_add(&fh->list, &devnode->fhs); + mutex_unlock(&devnode->lock); + + return 0; +} + +/* Override for the release function */ +static int cec_release(struct inode *inode, struct file *filp) +{ + struct cec_devnode *devnode = cec_devnode_data(filp); + struct cec_adapter *adap = to_cec_adapter(devnode); + struct cec_fh *fh = filp->private_data; + unsigned int i; + + mutex_lock(&adap->lock); + if (adap->cec_initiator == fh) + adap->cec_initiator = NULL; + if (adap->cec_follower == fh) { + adap->cec_follower = NULL; + adap->passthrough = false; + } + if (fh->mode_follower == CEC_MODE_FOLLOWER) + adap->follower_cnt--; + if (fh->mode_follower == CEC_MODE_MONITOR_PIN) + cec_monitor_pin_cnt_dec(adap); + if (fh->mode_follower == CEC_MODE_MONITOR_ALL) + cec_monitor_all_cnt_dec(adap); + mutex_unlock(&adap->lock); + + mutex_lock(&devnode->lock); + list_del(&fh->list); + if (cec_is_registered(adap) && list_empty(&devnode->fhs) && + !adap->needs_hpd && adap->phys_addr == CEC_PHYS_ADDR_INVALID) { + WARN_ON(adap->ops->adap_enable(adap, false)); + } + mutex_unlock(&devnode->lock); + + /* Unhook pending transmits from this filehandle. */ + mutex_lock(&adap->lock); + while (!list_empty(&fh->xfer_list)) { + struct cec_data *data = + list_first_entry(&fh->xfer_list, struct cec_data, xfer_list); + + data->blocking = false; + data->fh = NULL; + list_del(&data->xfer_list); + } + mutex_unlock(&adap->lock); + while (!list_empty(&fh->msgs)) { + struct cec_msg_entry *entry = + list_first_entry(&fh->msgs, struct cec_msg_entry, list); + + list_del(&entry->list); + kfree(entry); + } + for (i = CEC_NUM_CORE_EVENTS; i < CEC_NUM_EVENTS; i++) { + while (!list_empty(&fh->events[i])) { + struct cec_event_entry *entry = + list_first_entry(&fh->events[i], + struct cec_event_entry, list); + + list_del(&entry->list); + kfree(entry); + } + } + kfree(fh); + + cec_put_device(devnode); + filp->private_data = NULL; + return 0; +} + +const struct file_operations cec_devnode_fops = { + .owner = THIS_MODULE, + .open = cec_open, + .unlocked_ioctl = cec_ioctl, + .compat_ioctl = cec_ioctl, + .release = cec_release, + .poll = cec_poll, + .llseek = no_llseek, +}; |