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Input: xen-kbdfront - use string constants from PV protocol 

Xen input para-virtual protocol defines string constants
used by both back and frontend. Use those instead of
explicit strings in the frontend driver.

Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Oleksandr Andrushchenko 2017-05-28 23:52:23 -07:00 committed by Dmitry Torokhov
parent d4c9354b40
commit ad2ee01524
1 changed files with 13 additions and 9 deletions
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22
drivers/input/misc/xen-kbdfront.c
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@ -135,14 +135,17 @@ static int xenkbd_probe(struct xenbus_device *dev,
goto error_nomem;
/* Set input abs params to match backend screen res */
abs = xenbus_read_unsigned(dev->otherend, "feature-abs-pointer", 0);
ptr_size[KPARAM_X] = xenbus_read_unsigned(dev->otherend, "width",
abs = xenbus_read_unsigned(dev->otherend,
XENKBD_FIELD_FEAT_ABS_POINTER, 0);
ptr_size[KPARAM_X] = xenbus_read_unsigned(dev->otherend,
XENKBD_FIELD_WIDTH,
ptr_size[KPARAM_X]);
ptr_size[KPARAM_Y] = xenbus_read_unsigned(dev->otherend, "height",
ptr_size[KPARAM_Y] = xenbus_read_unsigned(dev->otherend,
XENKBD_FIELD_HEIGHT,
ptr_size[KPARAM_Y]);
if (abs) {
ret = xenbus_write(XBT_NIL, dev->nodename,
"request-abs-pointer", "1");
XENKBD_FIELD_REQ_ABS_POINTER, "1");
if (ret) {
pr_warn("xenkbd: can't request abs-pointer\n");
abs = 0;
@ -271,14 +274,15 @@ static int xenkbd_connect_backend(struct xenbus_device *dev,
xenbus_dev_fatal(dev, ret, "starting transaction");
goto error_irqh;
}
ret = xenbus_printf(xbt, dev->nodename, "page-ref", "%lu",
ret = xenbus_printf(xbt, dev->nodename, XENKBD_FIELD_RING_REF, "%lu",
virt_to_gfn(info->page));
if (ret)
goto error_xenbus;
ret = xenbus_printf(xbt, dev->nodename, "page-gref", "%u", info->gref);
ret = xenbus_printf(xbt, dev->nodename, XENKBD_FIELD_RING_GREF,
"%u", info->gref);
if (ret)
goto error_xenbus;
ret = xenbus_printf(xbt, dev->nodename, "event-channel", "%u",
ret = xenbus_printf(xbt, dev->nodename, XENKBD_FIELD_EVT_CHANNEL, "%u",
evtchn);
if (ret)
goto error_xenbus;
@ -353,7 +357,7 @@ static void xenkbd_backend_changed(struct xenbus_device *dev,
}
static const struct xenbus_device_id xenkbd_ids[] = {
{ "vkbd" },
{ XENKBD_DRIVER_NAME },
{ "" }
};
@ -390,4 +394,4 @@ module_exit(xenkbd_cleanup);
MODULE_DESCRIPTION("Xen virtual keyboard/pointer device frontend");
MODULE_LICENSE("GPL");
MODULE_ALIAS("xen:vkbd");
MODULE_ALIAS("xen:" XENKBD_DRIVER_NAME);