diff options
Diffstat (limited to 'drivers/hid/hidraw.c')
| -rw-r--r-- | drivers/hid/hidraw.c | 31 |
1 files changed, 19 insertions, 12 deletions
diff --git a/drivers/hid/hidraw.c b/drivers/hid/hidraw.c index 6a6dd5cd7833..ab24ce2eb28f 100644 --- a/drivers/hid/hidraw.c +++ b/drivers/hid/hidraw.c @@ -6,7 +6,7 @@ * to work on raw hid events as they want to, and avoids a need to * use a transport-specific userspace libhid/libusb libraries. * - * Copyright (c) 2007 Jiri Kosina + * Copyright (c) 2007-2014 Jiri Kosina */ /* @@ -104,8 +104,11 @@ out: return ret; } -/* The first byte is expected to be a report number. - * This function is to be called with the minors_lock mutex held */ +/* + * The first byte of the report buffer is expected to be a report number. + * + * This function is to be called with the minors_lock mutex held. + */ static ssize_t hidraw_send_report(struct file *file, const char __user *buffer, size_t count, unsigned char report_type) { unsigned int minor = iminor(file_inode(file)); @@ -157,7 +160,6 @@ out: return ret; } -/* the first byte is expected to be a report number */ static ssize_t hidraw_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos) { ssize_t ret; @@ -168,12 +170,15 @@ static ssize_t hidraw_write(struct file *file, const char __user *buffer, size_t } -/* This function performs a Get_Report transfer over the control endpoint +/* + * This function performs a Get_Report transfer over the control endpoint * per section 7.2.1 of the HID specification, version 1.1. The first byte * of buffer is the report number to request, or 0x0 if the defice does not * use numbered reports. The report_type parameter can be HID_FEATURE_REPORT - * or HID_INPUT_REPORT. This function is to be called with the minors_lock - * mutex held. */ + * or HID_INPUT_REPORT. + * + * This function is to be called with the minors_lock mutex held. + */ static ssize_t hidraw_get_report(struct file *file, char __user *buffer, size_t count, unsigned char report_type) { unsigned int minor = iminor(file_inode(file)); @@ -209,8 +214,10 @@ static ssize_t hidraw_get_report(struct file *file, char __user *buffer, size_t goto out; } - /* Read the first byte from the user. This is the report number, - * which is passed to dev->hid_get_raw_report(). */ + /* + * Read the first byte from the user. This is the report number, + * which is passed to dev->hid_get_raw_report(). + */ if (copy_from_user(&report_number, buffer, 1)) { ret = -EFAULT; goto out_free; @@ -313,13 +320,13 @@ static void drop_ref(struct hidraw *hidraw, int exists_bit) hid_hw_close(hidraw->hid); wake_up_interruptible(&hidraw->wait); } + device_destroy(hidraw_class, + MKDEV(hidraw_major, hidraw->minor)); } else { --hidraw->open; } if (!hidraw->open) { if (!hidraw->exist) { - device_destroy(hidraw_class, - MKDEV(hidraw_major, hidraw->minor)); hidraw_table[hidraw->minor] = NULL; kfree(hidraw); } else { @@ -498,7 +505,7 @@ int hidraw_connect(struct hid_device *hid) int minor, result; struct hidraw *dev; - /* we accept any HID device, no matter the applications */ + /* we accept any HID device, all applications */ dev = kzalloc(sizeof(struct hidraw), GFP_KERNEL); if (!dev) |