[PATCH v3 09/21] xen/dmabuf: switch gntdev-dmabuf to use INVALID_GRANT_REF

Juergen Gross
2022-05-05T08:17:55Z

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

Signed-off-by: Juergen Gross <jgross@suse.com>
---
drivers/xen/gntdev-dmabuf.c | 13 ++-----------
1 file changed, 2 insertions(+), 11 deletions(-)

diff --git a/drivers/xen/gntdev-dmabuf.c b/drivers/xen/gntdev-dmabuf.c
index d5bfd7b867fc..91073b4e4a20 100644
--- a/drivers/xen/gntdev-dmabuf.c
+++ b/drivers/xen/gntdev-dmabuf.c
@@ -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;

--
2.35.3