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xen/drm: switch xen_drm_front to use INVALID_GRANT_REF

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Instead of using a private macro for an invalid grant reference use
the common one.

Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com>
Tested-by: Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com> # Arm64 only
Signed-off-by: Juergen Gross <jgross@suse.com>
This commit is contained in:
Juergen Gross 2022-04-28 09:01:02 +02:00
parent edd81e7caa
commit cb5216319b
2 changed files with 2 additions and 11 deletions
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9
drivers/gpu/drm/xen/xen_drm_front.h
View file

@ -80,15 +80,6 @@ struct drm_pending_vblank_event;
/* timeout in ms to wait for backend to respond */
#define XEN_DRM_FRONT_WAIT_BACK_MS 3000
#ifndef GRANT_INVALID_REF
/*
* Note on usage of grant reference 0 as invalid grant reference:
* grant reference 0 is valid, but never exposed to a PV driver,
* because of the fact it is already in use/reserved by the PV console.
*/
#define GRANT_INVALID_REF 0
#endif
struct xen_drm_front_info {
struct xenbus_device *xb_dev;
struct xen_drm_front_drm_info *drm_info;

4
drivers/gpu/drm/xen/xen_drm_front_evtchnl.c
View file

@ -147,7 +147,7 @@ static void evtchnl_free(struct xen_drm_front_info *front_info,
xenbus_free_evtchn(front_info->xb_dev, evtchnl->port);
/* end access and free the page */
if (evtchnl->gref != GRANT_INVALID_REF)
if (evtchnl->gref != INVALID_GRANT_REF)
gnttab_end_foreign_access(evtchnl->gref, page);
memset(evtchnl, 0, sizeof(*evtchnl));
@ -168,7 +168,7 @@ static int evtchnl_alloc(struct xen_drm_front_info *front_info, int index,
evtchnl->index = index;
evtchnl->front_info = front_info;
evtchnl->state = EVTCHNL_STATE_DISCONNECTED;
evtchnl->gref = GRANT_INVALID_REF;
evtchnl->gref = INVALID_GRANT_REF;
page = get_zeroed_page(GFP_NOIO | __GFP_HIGH);
if (!page) {