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drm/nouveau/abi16: introduce locked variant of nouveau_abi16_get() 

USIF already takes the client mutex, but will need access to ABI16 data
in order to provide some limited interoperability.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2015-11-03 10:55:45 +10:00
parent 09433f24e6
commit 786a57ef2c
1 changed files with 13 additions and 5 deletions
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18
drivers/gpu/drm/nouveau/nouveau_abi16.c
View File

@ -32,11 +32,10 @@
#include "nouveau_chan.h"
#include "nouveau_abi16.h"
struct nouveau_abi16 *
nouveau_abi16_get(struct drm_file *file_priv)
static struct nouveau_abi16 *
nouveau_abi16(struct drm_file *file_priv)
{
struct nouveau_cli *cli = nouveau_cli(file_priv);
mutex_lock(&cli->mutex);
if (!cli->abi16) {
struct nouveau_abi16 *abi16;
cli->abi16 = abi16 = kzalloc(sizeof(*abi16), GFP_KERNEL);
@ -59,12 +58,21 @@ nouveau_abi16_get(struct drm_file *file_priv)
kfree(cli->abi16);
cli->abi16 = NULL;
}
mutex_unlock(&cli->mutex);
}
return cli->abi16;
}
struct nouveau_abi16 *
nouveau_abi16_get(struct drm_file *file_priv)
{
struct nouveau_cli *cli = nouveau_cli(file_priv);
mutex_lock(&cli->mutex);
if (nouveau_abi16(file_priv))
return cli->abi16;
mutex_unlock(&cli->mutex);
return NULL;
}
int
nouveau_abi16_put(struct nouveau_abi16 *abi16, int ret)
{