/*
* "ioctl" file op
*/
-static int hiddev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
+static noinline int hiddev_ioctl_usage(struct hiddev *hiddev, unsigned int cmd, void __user *user_arg)
+{
+ struct hid_device *hid = hiddev->hid;
+ struct hiddev_report_info rinfo;
+ struct hiddev_usage_ref_multi *uref_multi = NULL;
+ struct hiddev_usage_ref *uref;
+ struct hid_report *report;
+ struct hid_field *field;
+ int i;
+
+ uref_multi = kmalloc(sizeof(struct hiddev_usage_ref_multi), GFP_KERNEL);
+ if (!uref_multi)
+ return -ENOMEM;
+ lock_kernel();
+ uref = &uref_multi->uref;
+ if (cmd == HIDIOCGUSAGES || cmd == HIDIOCSUSAGES) {
+ if (copy_from_user(uref_multi, user_arg,
+ sizeof(*uref_multi)))
+ goto fault;
+ } else {
+ if (copy_from_user(uref, user_arg, sizeof(*uref)))
+ goto fault;
+ }
+
+ switch (cmd) {
+ case HIDIOCGUCODE:
+ rinfo.report_type = uref->report_type;
+ rinfo.report_id = uref->report_id;
+ if ((report = hiddev_lookup_report(hid, &rinfo)) == NULL)
+ goto inval;
+
+ if (uref->field_index >= report->maxfield)
+ goto inval;
+
+ field = report->field[uref->field_index];
+ if (uref->usage_index >= field->maxusage)
+ goto inval;
+
+ uref->usage_code = field->usage[uref->usage_index].hid;
+
+ if (copy_to_user(user_arg, uref, sizeof(*uref)))
+ goto fault;
+
+ kfree(uref_multi);
+ return 0;
+
+ default:
+ if (cmd != HIDIOCGUSAGE &&
+ cmd != HIDIOCGUSAGES &&
+ uref->report_type == HID_REPORT_TYPE_INPUT)
+ goto inval;
+
+ if (uref->report_id == HID_REPORT_ID_UNKNOWN) {
+ field = hiddev_lookup_usage(hid, uref);
+ if (field == NULL)
+ goto inval;
+ } else {
+ rinfo.report_type = uref->report_type;
+ rinfo.report_id = uref->report_id;
+ if ((report = hiddev_lookup_report(hid, &rinfo)) == NULL)
+ goto inval;
+
+ if (uref->field_index >= report->maxfield)
+ goto inval;
+
+ field = report->field[uref->field_index];
+
+ if (cmd == HIDIOCGCOLLECTIONINDEX) {
+ if (uref->usage_index >= field->maxusage)
+ goto inval;
+ } else if (uref->usage_index >= field->report_count)
+ goto inval;
+
+ else if ((cmd == HIDIOCGUSAGES || cmd == HIDIOCSUSAGES) &&
+ (uref_multi->num_values > HID_MAX_MULTI_USAGES ||
+ uref->usage_index + uref_multi->num_values > field->report_count))
+ goto inval;
+ }
+
+ switch (cmd) {
+ case HIDIOCGUSAGE:
+ uref->value = field->value[uref->usage_index];
+ if (copy_to_user(user_arg, uref, sizeof(*uref)))
+ goto fault;
+ goto goodreturn;
+
+ case HIDIOCSUSAGE:
+ field->value[uref->usage_index] = uref->value;
+ goto goodreturn;
+
+ case HIDIOCGCOLLECTIONINDEX:
+ kfree(uref_multi);
+ return field->usage[uref->usage_index].collection_index;
+ case HIDIOCGUSAGES:
+ for (i = 0; i < uref_multi->num_values; i++)
+ uref_multi->values[i] =
+ field->value[uref->usage_index + i];
+ if (copy_to_user(user_arg, uref_multi,
+ sizeof(*uref_multi)))
+ goto fault;
+ goto goodreturn;
+ case HIDIOCSUSAGES:
+ for (i = 0; i < uref_multi->num_values; i++)
+ field->value[uref->usage_index + i] =
+ uref_multi->values[i];
+ goto goodreturn;
+ }
+
+goodreturn:
+ unlock_kernel();
+ kfree(uref_multi);
+ return 0;
+fault:
+ unlock_kernel();
+ kfree(uref_multi);
+ return -EFAULT;
+inval:
+ unlock_kernel();
+ kfree(uref_multi);
+ return -EINVAL;
+ }
+}
+
+static noinline int hiddev_ioctl_string(struct hiddev *hiddev, unsigned int cmd, void __user *user_arg)
+{
+ struct hid_device *hid = hiddev->hid;
+ struct usb_device *dev = hid_to_usb_dev(hid);
+ int idx, len;
+ char *buf;
+
+ if (get_user(idx, (int __user *)user_arg))
+ return -EFAULT;
+
+ if ((buf = kmalloc(HID_STRING_SIZE, GFP_KERNEL)) == NULL)
+ return -ENOMEM;
+
+ if ((len = usb_string(dev, idx, buf, HID_STRING_SIZE-1)) < 0) {
+ kfree(buf);
+ return -EINVAL;
+ }
+
+ if (copy_to_user(user_arg+sizeof(int), buf, len+1)) {
+ kfree(buf);
+ return -EFAULT;
+ }
+
+ kfree(buf);
+
+ return len;
+}
+
+static long hiddev_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
struct hiddev_list *list = file->private_data;
struct hiddev *hiddev = list->hiddev;
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 *uref;
struct hiddev_devinfo dinfo;
struct hid_report *report;
struct hid_field *field;
struct usbhid_device *usbhid = hid->driver_data;
void __user *user_arg = (void __user *)arg;
int i;
+
+ /* Called without BKL by compat methods so no BKL taken */
+ /* FIXME: Who or what stop this racing with a disconnect ?? */
if (!hiddev->exist)
return -EIO;
}
case HIDIOCGSTRING:
- {
- int idx, len;
- char *buf;
-
- if (get_user(idx, (int __user *)arg))
- return -EFAULT;
-
- if ((buf = kmalloc(HID_STRING_SIZE, GFP_KERNEL)) == NULL)
- return -ENOMEM;
-
- if ((len = usb_string(dev, idx, buf, HID_STRING_SIZE-1)) < 0) {
- kfree(buf);
- return -EINVAL;
- }
-
- if (copy_to_user(user_arg+sizeof(int), buf, len+1)) {
- kfree(buf);
- return -EFAULT;
- }
-
- kfree(buf);
-
- return len;
- }
+ return hiddev_ioctl_string(hiddev, cmd, user_arg);
case HIDIOCINITREPORT:
usbhid_init_reports(hid);
return 0;
case HIDIOCGUCODE:
- uref_multi = kmalloc(sizeof(struct hiddev_usage_ref_multi), GFP_KERNEL);
- if (!uref_multi)
- return -ENOMEM;
- uref = &uref_multi->uref;
- if (copy_from_user(uref, user_arg, sizeof(*uref)))
- goto fault;
-
- rinfo.report_type = uref->report_type;
- rinfo.report_id = uref->report_id;
- if ((report = hiddev_lookup_report(hid, &rinfo)) == NULL)
- goto inval;
-
- if (uref->field_index >= report->maxfield)
- goto inval;
-
- field = report->field[uref->field_index];
- if (uref->usage_index >= field->maxusage)
- goto inval;
-
- uref->usage_code = field->usage[uref->usage_index].hid;
-
- if (copy_to_user(user_arg, uref, sizeof(*uref)))
- goto fault;
-
- kfree(uref_multi);
- return 0;
-
+ /* fall through */
case HIDIOCGUSAGE:
case HIDIOCSUSAGE:
case HIDIOCGUSAGES:
case HIDIOCSUSAGES:
case HIDIOCGCOLLECTIONINDEX:
- uref_multi = kmalloc(sizeof(struct hiddev_usage_ref_multi), GFP_KERNEL);
- if (!uref_multi)
- return -ENOMEM;
- uref = &uref_multi->uref;
- if (cmd == HIDIOCGUSAGES || cmd == HIDIOCSUSAGES) {
- if (copy_from_user(uref_multi, user_arg,
- sizeof(*uref_multi)))
- goto fault;
- } else {
- if (copy_from_user(uref, user_arg, sizeof(*uref)))
- goto fault;
- }
-
- if (cmd != HIDIOCGUSAGE &&
- cmd != HIDIOCGUSAGES &&
- uref->report_type == HID_REPORT_TYPE_INPUT)
- goto inval;
-
- if (uref->report_id == HID_REPORT_ID_UNKNOWN) {
- field = hiddev_lookup_usage(hid, uref);
- if (field == NULL)
- goto inval;
- } else {
- rinfo.report_type = uref->report_type;
- rinfo.report_id = uref->report_id;
- if ((report = hiddev_lookup_report(hid, &rinfo)) == NULL)
- goto inval;
-
- if (uref->field_index >= report->maxfield)
- goto inval;
-
- field = report->field[uref->field_index];
-
- if (cmd == HIDIOCGCOLLECTIONINDEX) {
- if (uref->usage_index >= field->maxusage)
- goto inval;
- } else if (uref->usage_index >= field->report_count)
- goto inval;
-
- else if ((cmd == HIDIOCGUSAGES || cmd == HIDIOCSUSAGES) &&
- (uref_multi->num_values > HID_MAX_MULTI_USAGES ||
- uref->usage_index + uref_multi->num_values > field->report_count))
- goto inval;
- }
-
- switch (cmd) {
- case HIDIOCGUSAGE:
- uref->value = field->value[uref->usage_index];
- if (copy_to_user(user_arg, uref, sizeof(*uref)))
- goto fault;
- goto goodreturn;
-
- case HIDIOCSUSAGE:
- field->value[uref->usage_index] = uref->value;
- goto goodreturn;
-
- case HIDIOCGCOLLECTIONINDEX:
- kfree(uref_multi);
- return field->usage[uref->usage_index].collection_index;
- case HIDIOCGUSAGES:
- for (i = 0; i < uref_multi->num_values; i++)
- uref_multi->values[i] =
- field->value[uref->usage_index + i];
- if (copy_to_user(user_arg, uref_multi,
- sizeof(*uref_multi)))
- goto fault;
- goto goodreturn;
- case HIDIOCSUSAGES:
- for (i = 0; i < uref_multi->num_values; i++)
- field->value[uref->usage_index + i] =
- uref_multi->values[i];
- goto goodreturn;
- }
-
-goodreturn:
- kfree(uref_multi);
- return 0;
-fault:
- kfree(uref_multi);
- return -EFAULT;
-inval:
- kfree(uref_multi);
- return -EINVAL;
+ return hiddev_ioctl_usage(hiddev, cmd, user_arg);
case HIDIOCGCOLLECTIONINFO:
if (copy_from_user(&cinfo, user_arg, sizeof(cinfo)))
.poll = hiddev_poll,
.open = hiddev_open,
.release = hiddev_release,
- .ioctl = hiddev_ioctl,
+ .unlocked_ioctl = hiddev_ioctl,
.fasync = hiddev_fasync,
#ifdef CONFIG_COMPAT
.compat_ioctl = hiddev_compat_ioctl,
projects / linux-2.6-omap-h63xx.git / blobdiff