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xen/dmabuf: switch gntdev-dmabuf 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: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
This commit is contained in:
Juergen Gross 2022-04-28 09:01:03 +02:00
parent 297ce02669
commit bd506c7812
1 changed files with 2 additions and 11 deletions
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13
drivers/xen/gntdev-dmabuf.c
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@ -24,15 +24,6 @@
MODULE_IMPORT_NS(DMA_BUF);
#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 driver,
* because of the fact it is already in use/reserved by the PV console.
*/
#define GRANT_INVALID_REF 0
#endif
struct gntdev_dmabuf {
struct gntdev_dmabuf_priv *priv;
struct dma_buf *dmabuf;
@ -532,7 +523,7 @@ static void dmabuf_imp_end_foreign_access(u32 *refs, int count)
int i;
for (i = 0; i < count; i++)
if (refs[i] != GRANT_INVALID_REF)
if (refs[i] != INVALID_GRANT_REF)
gnttab_end_foreign_access(refs[i], 0UL);
}
@ -567,7 +558,7 @@ static struct gntdev_dmabuf *dmabuf_imp_alloc_storage(int count)
gntdev_dmabuf->nr_pages = count;
for (i = 0; i < count; i++)
gntdev_dmabuf->u.imp.refs[i] = GRANT_INVALID_REF;
gntdev_dmabuf->u.imp.refs[i] = INVALID_GRANT_REF;
return gntdev_dmabuf;