mirror of
https://github.com/torvalds/linux.git
synced 2024-12-05 10:32:35 +00:00
Input: hiddev - use standard list implementation
Fixes Coverity #id 303 Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
parent
b6d786dbe6
commit
826d598242
@ -49,7 +49,7 @@ struct hiddev {
|
||||
int open;
|
||||
wait_queue_head_t wait;
|
||||
struct hid_device *hid;
|
||||
struct hiddev_list *list;
|
||||
struct list_head list;
|
||||
};
|
||||
|
||||
struct hiddev_list {
|
||||
@ -59,7 +59,7 @@ struct hiddev_list {
|
||||
unsigned flags;
|
||||
struct fasync_struct *fasync;
|
||||
struct hiddev *hiddev;
|
||||
struct hiddev_list *next;
|
||||
struct list_head node;
|
||||
};
|
||||
|
||||
static struct hiddev *hiddev_table[HIDDEV_MINORS];
|
||||
@ -73,12 +73,15 @@ static struct hiddev *hiddev_table[HIDDEV_MINORS];
|
||||
static struct hid_report *
|
||||
hiddev_lookup_report(struct hid_device *hid, struct hiddev_report_info *rinfo)
|
||||
{
|
||||
unsigned flags = rinfo->report_id & ~HID_REPORT_ID_MASK;
|
||||
unsigned int flags = rinfo->report_id & ~HID_REPORT_ID_MASK;
|
||||
unsigned int rid = rinfo->report_id & HID_REPORT_ID_MASK;
|
||||
struct hid_report_enum *report_enum;
|
||||
struct hid_report *report;
|
||||
struct list_head *list;
|
||||
|
||||
if (rinfo->report_type < HID_REPORT_TYPE_MIN ||
|
||||
rinfo->report_type > HID_REPORT_TYPE_MAX) return NULL;
|
||||
rinfo->report_type > HID_REPORT_TYPE_MAX)
|
||||
return NULL;
|
||||
|
||||
report_enum = hid->report_enum +
|
||||
(rinfo->report_type - HID_REPORT_TYPE_MIN);
|
||||
@ -88,21 +91,25 @@ hiddev_lookup_report(struct hid_device *hid, struct hiddev_report_info *rinfo)
|
||||
break;
|
||||
|
||||
case HID_REPORT_ID_FIRST:
|
||||
list = report_enum->report_list.next;
|
||||
if (list == &report_enum->report_list)
|
||||
if (list_empty(&report_enum->report_list))
|
||||
return NULL;
|
||||
rinfo->report_id = ((struct hid_report *) list)->id;
|
||||
|
||||
list = report_enum->report_list.next;
|
||||
report = list_entry(list, struct hid_report, list);
|
||||
rinfo->report_id = report->id;
|
||||
break;
|
||||
|
||||
case HID_REPORT_ID_NEXT:
|
||||
list = (struct list_head *)
|
||||
report_enum->report_id_hash[rinfo->report_id & HID_REPORT_ID_MASK];
|
||||
if (list == NULL)
|
||||
report = report_enum->report_id_hash[rid];
|
||||
if (!report)
|
||||
return NULL;
|
||||
list = list->next;
|
||||
|
||||
list = report->list.next;
|
||||
if (list == &report_enum->report_list)
|
||||
return NULL;
|
||||
rinfo->report_id = ((struct hid_report *) list)->id;
|
||||
|
||||
report = list_entry(list, struct hid_report, list);
|
||||
rinfo->report_id = report->id;
|
||||
break;
|
||||
|
||||
default:
|
||||
@ -125,12 +132,13 @@ hiddev_lookup_usage(struct hid_device *hid, struct hiddev_usage_ref *uref)
|
||||
struct hid_field *field;
|
||||
|
||||
if (uref->report_type < HID_REPORT_TYPE_MIN ||
|
||||
uref->report_type > HID_REPORT_TYPE_MAX) return NULL;
|
||||
uref->report_type > HID_REPORT_TYPE_MAX)
|
||||
return NULL;
|
||||
|
||||
report_enum = hid->report_enum +
|
||||
(uref->report_type - HID_REPORT_TYPE_MIN);
|
||||
|
||||
list_for_each_entry(report, &report_enum->report_list, list)
|
||||
list_for_each_entry(report, &report_enum->report_list, list) {
|
||||
for (i = 0; i < report->maxfield; i++) {
|
||||
field = report->field[i];
|
||||
for (j = 0; j < field->maxusage; j++) {
|
||||
@ -142,6 +150,7 @@ hiddev_lookup_usage(struct hid_device *hid, struct hiddev_usage_ref *uref)
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
return NULL;
|
||||
}
|
||||
@ -150,9 +159,9 @@ static void hiddev_send_event(struct hid_device *hid,
|
||||
struct hiddev_usage_ref *uref)
|
||||
{
|
||||
struct hiddev *hiddev = hid->hiddev;
|
||||
struct hiddev_list *list = hiddev->list;
|
||||
struct hiddev_list *list;
|
||||
|
||||
while (list) {
|
||||
list_for_each_entry(list, &hiddev->list, node) {
|
||||
if (uref->field_index != HID_FIELD_INDEX_NONE ||
|
||||
(list->flags & HIDDEV_FLAG_REPORT) != 0) {
|
||||
list->buffer[list->head] = *uref;
|
||||
@ -160,8 +169,6 @@ static void hiddev_send_event(struct hid_device *hid,
|
||||
(HIDDEV_BUFFER_SIZE - 1);
|
||||
kill_fasync(&list->fasync, SIGIO, POLL_IN);
|
||||
}
|
||||
|
||||
list = list->next;
|
||||
}
|
||||
|
||||
wake_up_interruptible(&hiddev->wait);
|
||||
@ -180,7 +187,7 @@ void hiddev_hid_event(struct hid_device *hid, struct hid_field *field,
|
||||
uref.report_type =
|
||||
(type == HID_INPUT_REPORT) ? HID_REPORT_TYPE_INPUT :
|
||||
((type == HID_OUTPUT_REPORT) ? HID_REPORT_TYPE_OUTPUT :
|
||||
((type == HID_FEATURE_REPORT) ? HID_REPORT_TYPE_FEATURE:0));
|
||||
((type == HID_FEATURE_REPORT) ? HID_REPORT_TYPE_FEATURE : 0));
|
||||
uref.report_id = field->report->id;
|
||||
uref.field_index = field->index;
|
||||
uref.usage_index = (usage - field->usage);
|
||||
@ -200,7 +207,7 @@ void hiddev_report_event(struct hid_device *hid, struct hid_report *report)
|
||||
uref.report_type =
|
||||
(type == HID_INPUT_REPORT) ? HID_REPORT_TYPE_INPUT :
|
||||
((type == HID_OUTPUT_REPORT) ? HID_REPORT_TYPE_OUTPUT :
|
||||
((type == HID_FEATURE_REPORT) ? HID_REPORT_TYPE_FEATURE:0));
|
||||
((type == HID_FEATURE_REPORT) ? HID_REPORT_TYPE_FEATURE : 0));
|
||||
uref.report_id = report->id;
|
||||
uref.field_index = HID_FIELD_INDEX_NONE;
|
||||
|
||||
@ -213,7 +220,9 @@ static int hiddev_fasync(int fd, struct file *file, int on)
|
||||
{
|
||||
int retval;
|
||||
struct hiddev_list *list = file->private_data;
|
||||
|
||||
retval = fasync_helper(fd, file, on, &list->fasync);
|
||||
|
||||
return retval < 0 ? retval : 0;
|
||||
}
|
||||
|
||||
@ -224,14 +233,9 @@ static int hiddev_fasync(int fd, struct file *file, int on)
|
||||
static int hiddev_release(struct inode * inode, struct file * file)
|
||||
{
|
||||
struct hiddev_list *list = file->private_data;
|
||||
struct hiddev_list **listptr;
|
||||
|
||||
listptr = &list->hiddev->list;
|
||||
hiddev_fasync(-1, file, 0);
|
||||
|
||||
while (*listptr && (*listptr != list))
|
||||
listptr = &((*listptr)->next);
|
||||
*listptr = (*listptr)->next;
|
||||
list_del(&list->node);
|
||||
|
||||
if (!--list->hiddev->open) {
|
||||
if (list->hiddev->exist)
|
||||
@ -248,7 +252,8 @@ static int hiddev_release(struct inode * inode, struct file * file)
|
||||
/*
|
||||
* open file op
|
||||
*/
|
||||
static int hiddev_open(struct inode * inode, struct file * file) {
|
||||
static int hiddev_open(struct inode *inode, struct file *file)
|
||||
{
|
||||
struct hiddev_list *list;
|
||||
|
||||
int i = iminor(inode) - HIDDEV_MINOR_BASE;
|
||||
@ -260,9 +265,7 @@ static int hiddev_open(struct inode * inode, struct file * file) {
|
||||
return -ENOMEM;
|
||||
|
||||
list->hiddev = hiddev_table[i];
|
||||
list->next = hiddev_table[i]->list;
|
||||
hiddev_table[i]->list = list;
|
||||
|
||||
list_add_tail(&list->node, &hiddev_table[i]->list);
|
||||
file->private_data = list;
|
||||
|
||||
if (!list->hiddev->open++)
|
||||
@ -362,6 +365,7 @@ static ssize_t hiddev_read(struct file * file, char __user * buffer, size_t coun
|
||||
static unsigned int hiddev_poll(struct file *file, poll_table *wait)
|
||||
{
|
||||
struct hiddev_list *list = file->private_data;
|
||||
|
||||
poll_wait(file, &list->hiddev->wait, wait);
|
||||
if (list->head != list->tail)
|
||||
return POLLIN | POLLRDNORM;
|
||||
@ -382,7 +386,7 @@ static int hiddev_ioctl(struct inode *inode, struct file *file, unsigned int cmd
|
||||
struct hiddev_collection_info cinfo;
|
||||
struct hiddev_report_info rinfo;
|
||||
struct hiddev_field_info finfo;
|
||||
struct hiddev_usage_ref_multi *uref_multi=NULL;
|
||||
struct hiddev_usage_ref_multi *uref_multi = NULL;
|
||||
struct hiddev_usage_ref *uref;
|
||||
struct hiddev_devinfo dinfo;
|
||||
struct hid_report *report;
|
||||
@ -764,15 +768,15 @@ int hiddev_connect(struct hid_device *hid)
|
||||
}
|
||||
|
||||
init_waitqueue_head(&hiddev->wait);
|
||||
|
||||
hiddev_table[hid->intf->minor - HIDDEV_MINOR_BASE] = hiddev;
|
||||
|
||||
INIT_LIST_HEAD(&hiddev->list);
|
||||
hiddev->hid = hid;
|
||||
hiddev->exist = 1;
|
||||
|
||||
hid->minor = hid->intf->minor;
|
||||
hid->hiddev = hiddev;
|
||||
|
||||
hiddev_table[hid->intf->minor - HIDDEV_MINOR_BASE] = hiddev;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
Loading…
Reference in New Issue
Block a user