From 786a57ef2cebb2d09d7f152b0ed4f1da1d368073 Mon Sep 17 00:00:00 2001 From: Ben Skeggs Date: Tue, 3 Nov 2015 10:55:45 +1000 Subject: 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 --- drivers/gpu/drm/nouveau/nouveau_abi16.c | 18 +++++++++++++----- 1 file changed, 13 insertions(+), 5 deletions(-) (limited to 'drivers/gpu') diff --git a/drivers/gpu/drm/nouveau/nouveau_abi16.c b/drivers/gpu/drm/nouveau/nouveau_abi16.c index c3dea3331e12..998f5cb2dfac 100644 --- a/drivers/gpu/drm/nouveau/nouveau_abi16.c +++ b/drivers/gpu/drm/nouveau/nouveau_abi16.c @@ -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) { -- cgit v1.2.3