Commit 9d51e801 authored by Benjamin Tisssoires's avatar Benjamin Tisssoires Committed by Dmitry Torokhov
Browse files

Input: uinput - breaks by goto out in uinput_ioctl_handler 



The current implementation prevents us to add variable-length ioctl.
Use a bunch of gotos instead of break to allow us to do so.

No functional changes.

Signed-off-by: default avatarBenjamin Tisssoires <benjamin.tissoires@redhat.com>
Reviewed-by: default avatarDavid Herrmann <dh.herrmann@gmail.com>
Signed-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
parent 6f2e6c9b

drivers/input/misc/uinput.c

+27 −29
Original line number Diff line number Diff line
@@ -693,51 +693,51 @@ static long uinput_ioctl_handler(struct file *file, unsigned int cmd, 
	switch (cmd) {

		case UI_DEV_CREATE:

			retval = uinput_create_device(udev);

			break;

			goto out;



		case UI_DEV_DESTROY:

			uinput_destroy_device(udev);

			break;

			goto out;



		case UI_SET_EVBIT:

			retval = uinput_set_bit(arg, evbit, EV_MAX);

			break;

			goto out;



		case UI_SET_KEYBIT:

			retval = uinput_set_bit(arg, keybit, KEY_MAX);

			break;

			goto out;



		case UI_SET_RELBIT:

			retval = uinput_set_bit(arg, relbit, REL_MAX);

			break;

			goto out;



		case UI_SET_ABSBIT:

			retval = uinput_set_bit(arg, absbit, ABS_MAX);

			break;

			goto out;



		case UI_SET_MSCBIT:

			retval = uinput_set_bit(arg, mscbit, MSC_MAX);

			break;

			goto out;



		case UI_SET_LEDBIT:

			retval = uinput_set_bit(arg, ledbit, LED_MAX);

			break;

			goto out;



		case UI_SET_SNDBIT:

			retval = uinput_set_bit(arg, sndbit, SND_MAX);

			break;

			goto out;



		case UI_SET_FFBIT:

			retval = uinput_set_bit(arg, ffbit, FF_MAX);

			break;

			goto out;



		case UI_SET_SWBIT:

			retval = uinput_set_bit(arg, swbit, SW_MAX);

			break;

			goto out;



		case UI_SET_PROPBIT:

			retval = uinput_set_bit(arg, propbit, INPUT_PROP_MAX);

			break;

			goto out;



		case UI_SET_PHYS:

			if (udev->state == UIST_CREATED) {
@@ -753,18 +753,18 @@ static long uinput_ioctl_handler(struct file *file, unsigned int cmd, 


			kfree(udev->dev->phys);

			udev->dev->phys = phys;

			break;

			goto out;



		case UI_BEGIN_FF_UPLOAD:

			retval = uinput_ff_upload_from_user(p, &ff_up);

			if (retval)

				break;

				goto out;



			req = uinput_request_find(udev, ff_up.request_id);

			if (!req || req->code != UI_FF_UPLOAD ||

			    !req->u.upload.effect) {

				retval = -EINVAL;

				break;

				goto out;

			}



			ff_up.retval = 0;
@@ -775,65 +775,63 @@ static long uinput_ioctl_handler(struct file *file, unsigned int cmd, 
				memset(&ff_up.old, 0, sizeof(struct ff_effect));



			retval = uinput_ff_upload_to_user(p, &ff_up);

			break;

			goto out;



		case UI_BEGIN_FF_ERASE:

			if (copy_from_user(&ff_erase, p, sizeof(ff_erase))) {

				retval = -EFAULT;

				break;

				goto out;

			}



			req = uinput_request_find(udev, ff_erase.request_id);

			if (!req || req->code != UI_FF_ERASE) {

				retval = -EINVAL;

				break;

				goto out;

			}



			ff_erase.retval = 0;

			ff_erase.effect_id = req->u.effect_id;

			if (copy_to_user(p, &ff_erase, sizeof(ff_erase))) {

				retval = -EFAULT;

				break;

				goto out;

			}



			break;

			goto out;



		case UI_END_FF_UPLOAD:

			retval = uinput_ff_upload_from_user(p, &ff_up);

			if (retval)

				break;

				goto out;



			req = uinput_request_find(udev, ff_up.request_id);

			if (!req || req->code != UI_FF_UPLOAD ||

			    !req->u.upload.effect) {

				retval = -EINVAL;

				break;

				goto out;

			}



			req->retval = ff_up.retval;

			uinput_request_done(udev, req);

			break;

			goto out;



		case UI_END_FF_ERASE:

			if (copy_from_user(&ff_erase, p, sizeof(ff_erase))) {

				retval = -EFAULT;

				break;

				goto out;

			}



			req = uinput_request_find(udev, ff_erase.request_id);

			if (!req || req->code != UI_FF_ERASE) {

				retval = -EINVAL;

				break;

				goto out;

			}



			req->retval = ff_erase.retval;

			uinput_request_done(udev, req);

			break;



		default:

			retval = -EINVAL;

			goto out;

	}



	retval = -EINVAL;

 out:

	mutex_unlock(&udev->mutex);

	return retval;