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HID: hidraw: make comment more accurate and nicer

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Reformat and reword some of the comments to make them more understandable.

Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Jiri Kosina 2014-01-06 16:43:27 +01:00
parent bbe3175408
commit 618345359e
1 changed files with 17 additions and 10 deletions
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27
drivers/hid/hidraw.c
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@ -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 @@ static ssize_t hidraw_read(struct file *file, char __user *buffer, size_t count,
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 @@ static ssize_t hidraw_send_report(struct file *file, const char __user *buffer,
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;
@ -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)