Merge tag 'drm-msm-fixes-2023-01-16' into msm-fixes

Back-merge of previous cycles msm-fixes for kexec fix (to avoid merge
conflict)

Signed-off-by: Rob Clark <robdclark@chromium.org>

4 files changed, 19 insertions, 4 deletions

diff --git a/drivers/gpu/drm/msm/adreno/adreno_device.c b/drivers/gpu/drm/msm/adreno/adreno_device.c
index 628806423f7d..36f062c7582f 100644
--- a/drivers/gpu/drm/msm/adreno/adreno_device.c
+++ b/drivers/gpu/drm/msm/adreno/adreno_device.c
@@ -551,13 +551,14 @@ static int adreno_bind(struct device *dev, struct device *master, void *data)
 	return 0;
 }
 
+static int adreno_system_suspend(struct device *dev);
 static void adreno_unbind(struct device *dev, struct device *master,
 		void *data)
 {
 	struct msm_drm_private *priv = dev_get_drvdata(master);
 	struct msm_gpu *gpu = dev_to_gpu(dev);
 
-	pm_runtime_force_suspend(dev);
+	WARN_ON_ONCE(adreno_system_suspend(dev));
 	gpu->funcs->destroy(gpu);
 
 	priv->gpu_pdev = NULL;
@@ -609,7 +610,7 @@ static int adreno_remove(struct platform_device *pdev)
 
 static void adreno_shutdown(struct platform_device *pdev)
 {
-	pm_runtime_force_suspend(&pdev->dev);
+	WARN_ON_ONCE(adreno_system_suspend(&pdev->dev));
 }
 
 static const struct of_device_id dt_match[] = {
diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.c b/drivers/gpu/drm/msm/adreno/adreno_gpu.c
index 3bc02dbed9a7..817599766329 100644
--- a/drivers/gpu/drm/msm/adreno/adreno_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.c
@@ -352,6 +352,8 @@ int adreno_set_param(struct msm_gpu *gpu, struct msm_file_private *ctx,
 		/* Ensure string is null terminated: */
 		str[len] = '\0';
 
+		mutex_lock(&gpu->lock);
+
 		if (param == MSM_PARAM_COMM) {
 			paramp = &ctx->comm;
 		} else {
@@ -361,6 +363,8 @@ int adreno_set_param(struct msm_gpu *gpu, struct msm_file_private *ctx,
 		kfree(*paramp);
 		*paramp = str;
 
+		mutex_unlock(&gpu->lock);
+
 		return 0;
 	}
 	case MSM_PARAM_SYSPROF:
diff --git a/drivers/gpu/drm/msm/msm_gpu.c b/drivers/gpu/drm/msm/msm_gpu.c
index 30ed45af76ad..380249500325 100644
--- a/drivers/gpu/drm/msm/msm_gpu.c
+++ b/drivers/gpu/drm/msm/msm_gpu.c
@@ -335,6 +335,8 @@ static void get_comm_cmdline(struct msm_gem_submit *submit, char **comm, char **
 	struct msm_file_private *ctx = submit->queue->ctx;
 	struct task_struct *task;
 
+	WARN_ON(!mutex_is_locked(&submit->gpu->lock));
+
 	/* Note that kstrdup will return NULL if argument is NULL: */
 	*comm = kstrdup(ctx->comm, GFP_KERNEL);
 	*cmd  = kstrdup(ctx->cmdline, GFP_KERNEL);
diff --git a/drivers/gpu/drm/msm/msm_gpu.h b/drivers/gpu/drm/msm/msm_gpu.h
index a771f56ed70f..fc1c0d8611a8 100644
--- a/drivers/gpu/drm/msm/msm_gpu.h
+++ b/drivers/gpu/drm/msm/msm_gpu.h
@@ -375,10 +375,18 @@ struct msm_file_private {
 	 */
 	int sysprof;
 
-	/** comm: Overridden task comm, see MSM_PARAM_COMM */
+	/**
+	 * comm: Overridden task comm, see MSM_PARAM_COMM
+	 *
+	 * Accessed under msm_gpu::lock
+	 */
 	char *comm;
 
-	/** cmdline: Overridden task cmdline, see MSM_PARAM_CMDLINE */
+	/**
+	 * cmdline: Overridden task cmdline, see MSM_PARAM_CMDLINE
+	 *
+	 * Accessed under msm_gpu::lock
+	 */
 	char *cmdline;
 
 	/**