From: Thierry Reding <treding@nvidia.com>
Date: Wed, 16 May 2018 14:12:33 +0200
Subject: gpu: host1x: Store pointer to client in jobs
Git-commit: bf3d41ccabb53c57e19fcfc8b81d790043ac2bed
Patch-mainline: v4.18-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166

Rather than storing some identifier derived from the application
context that can't be used concretely anywhere, store a pointer to the
client directly so that accesses can be made directly through that
client object.

Reviewed-by: Dmitry Osipenko <digetx@gmail.com>
Tested-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
 drivers/gpu/drm/tegra/drm.c |    5 +++--
 drivers/gpu/host1x/cdma.c   |    2 +-
 drivers/gpu/host1x/cdma.h   |    2 +-
 include/linux/host1x.h      |    3 ++-
 4 files changed, 7 insertions(+), 5 deletions(-)

--- a/drivers/gpu/drm/tegra/drm.c
+++ b/drivers/gpu/drm/tegra/drm.c
@@ -312,6 +312,7 @@ int tegra_drm_submit(struct tegra_drm_co
 		     struct drm_tegra_submit *args, struct drm_device *drm,
 		     struct drm_file *file)
 {
+	struct host1x_client *client = &context->client->base;
 	unsigned int num_cmdbufs = args->num_cmdbufs;
 	unsigned int num_relocs = args->num_relocs;
 	struct drm_tegra_cmdbuf __user *user_cmdbufs;
@@ -343,8 +344,8 @@ int tegra_drm_submit(struct tegra_drm_co
 		return -ENOMEM;
 
 	job->num_relocs = args->num_relocs;
-	job->client = (u32)args->context;
-	job->class = context->client->base.class;
+	job->client = client;
+	job->class = client->class;
 	job->serialize = true;
 
 	/*
--- a/drivers/gpu/host1x/cdma.c
+++ b/drivers/gpu/host1x/cdma.c
@@ -247,7 +247,7 @@ static void cdma_start_timer_locked(stru
 static void stop_cdma_timer_locked(struct host1x_cdma *cdma)
 {
 	cancel_delayed_work(&cdma->timeout.wq);
-	cdma->timeout.client = 0;
+	cdma->timeout.client = NULL;
 }
 
 /*
--- a/drivers/gpu/host1x/cdma.h
+++ b/drivers/gpu/host1x/cdma.h
@@ -58,7 +58,7 @@ struct buffer_timeout {
 	u32 syncpt_val;			/* syncpt value when completed */
 	ktime_t start_ktime;		/* starting time */
 	/* context timeout information */
-	int client;
+	struct host1x_client *client;
 };
 
 enum cdma_event {
--- a/include/linux/host1x.h
+++ b/include/linux/host1x.h
@@ -186,7 +186,8 @@ struct host1x_job {
 	/* Channel where job is submitted to */
 	struct host1x_channel *channel;
 
-	u32 client;
+	/* client where the job originated */
+	struct host1x_client *client;
 
 	/* Gathers and their memory */
 	struct host1x_job_gather *gathers;