diff options
| -rw-r--r-- | drivers/media/cec/cec-core.c | 58 | ||||
| -rw-r--r-- | include/media/cec.h | 5 |
2 files changed, 63 insertions, 0 deletions
diff --git a/drivers/media/cec/cec-core.c b/drivers/media/cec/cec-core.c index e47ea22b3c23..ea3eccfdba15 100644 --- a/drivers/media/cec/cec-core.c +++ b/drivers/media/cec/cec-core.c @@ -195,6 +195,55 @@ void cec_register_cec_notifier(struct cec_adapter *adap, EXPORT_SYMBOL_GPL(cec_register_cec_notifier); #endif +#ifdef CONFIG_DEBUG_FS +static ssize_t cec_error_inj_write(struct file *file, + const char __user *ubuf, size_t count, loff_t *ppos) +{ + struct seq_file *sf = file->private_data; + struct cec_adapter *adap = sf->private; + char *buf; + char *line; + char *p; + + buf = memdup_user_nul(ubuf, min_t(size_t, PAGE_SIZE, count)); + if (IS_ERR(buf)) + return PTR_ERR(buf); + p = buf; + while (p && *p && count >= 0) { + p = skip_spaces(p); + line = strsep(&p, "\n"); + if (!*line || *line == '#') + continue; + if (!adap->ops->error_inj_parse_line(adap, line)) { + count = -EINVAL; + break; + } + } + kfree(buf); + return count; +} + +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); +} + +static int cec_error_inj_open(struct inode *inode, struct file *file) +{ + return single_open(file, cec_error_inj_show, inode->i_private); +} + +static const struct file_operations cec_error_inj_fops = { + .open = cec_error_inj_open, + .write = cec_error_inj_write, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; +#endif + struct cec_adapter *cec_allocate_adapter(const struct cec_adap_ops *ops, void *priv, const char *name, u32 caps, u8 available_las) @@ -334,7 +383,16 @@ int cec_register_adapter(struct cec_adapter *adap, pr_warn("cec-%s: Failed to create status file\n", adap->name); debugfs_remove_recursive(adap->cec_dir); adap->cec_dir = NULL; + return 0; } + if (!adap->ops->error_inj_show || !adap->ops->error_inj_parse_line) + return 0; + adap->error_inj_file = debugfs_create_file("error-inj", 0644, + adap->cec_dir, adap, + &cec_error_inj_fops); + if (IS_ERR_OR_NULL(adap->error_inj_file)) + pr_warn("cec-%s: Failed to create error-inj file\n", + adap->name); #endif return 0; } diff --git a/include/media/cec.h b/include/media/cec.h index 9afba9b558df..41df048efc55 100644 --- a/include/media/cec.h +++ b/include/media/cec.h @@ -117,6 +117,10 @@ struct cec_adap_ops { void (*adap_status)(struct cec_adapter *adap, struct seq_file *file); void (*adap_free)(struct cec_adapter *adap); + /* Error injection callbacks */ + int (*error_inj_show)(struct cec_adapter *adap, struct seq_file *sf); + bool (*error_inj_parse_line)(struct cec_adapter *adap, char *line); + /* High-level CEC message callback */ int (*received)(struct cec_adapter *adap, struct cec_msg *msg); }; @@ -189,6 +193,7 @@ struct cec_adapter { struct dentry *cec_dir; struct dentry *status_file; + struct dentry *error_inj_file; u16 phys_addrs[15]; u32 sequence; |