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xen/sound: switch xen_snd_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 cb5216319b
commit 297ce02669
2 changed files with 2 additions and 11 deletions
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4
sound/xen/xen_snd_front_evtchnl.c
View File

@ -167,7 +167,7 @@ static void evtchnl_free(struct xen_snd_front_info *front_info,
xenbus_free_evtchn(front_info->xb_dev, channel->port);
/* End access and free the page. */
if (channel->gref != GRANT_INVALID_REF)
if (channel->gref != INVALID_GRANT_REF)
gnttab_end_foreign_access(channel->gref, page);
else
free_page(page);
@ -207,7 +207,7 @@ static int evtchnl_alloc(struct xen_snd_front_info *front_info, int index,
channel->index = index;
channel->front_info = front_info;
channel->state = EVTCHNL_STATE_DISCONNECTED;
channel->gref = GRANT_INVALID_REF;
channel->gref = INVALID_GRANT_REF;
page = get_zeroed_page(GFP_KERNEL);
if (!page) {
ret = -ENOMEM;

9
sound/xen/xen_snd_front_evtchnl.h
View File

@ -15,15 +15,6 @@
struct xen_snd_front_info;
#ifndef GRANT_INVALID_REF
/*
* FIXME: 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
/* Timeout in ms to wait for backend to respond. */
#define VSND_WAIT_BACK_MS 3000