On 9/9/20 5:06 AM, Dmitry Osipenko wrote:
05.09.2020 13:34, Mikko Perttunen пишет:
+int tegra_drm_ioctl_channel_open(struct drm_device *drm, void *data,
+ struct drm_file *file)
+{
+ struct tegra_drm_file *fpriv = file->driver_priv;
+ struct tegra_drm *tegra = drm->dev_private;
+ struct drm_tegra_channel_open *args = data;
+ struct tegra_drm_client *client = NULL;
+ struct tegra_drm_channel_ctx *ctx;
+ int err;
+
+ if (args->flags || args->reserved[0] || args->reserved[1])
+ return -EINVAL;
+
+ ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
+ if (!ctx)
+ return -ENOMEM;
+
+ err = -ENODEV;
+ list_for_each_entry(client, &tegra->clients, list) {
+ if (client->base.class == args->host1x_class) {
+ err = 0;
+ break;
+ }
+ }
+ if (err)
+ goto free_ctx;
+
+ if (client->shared_channel) {
+ ctx->channel = host1x_channel_get(client->shared_channel);
+ } else {
+ ctx->channel = host1x_channel_request(&client->base);
+ if (!ctx->channel) {
+ err = -EBUSY;
+ goto free_ctx;
+ }
+ }
+
+ err = xa_alloc(&fpriv->contexts, &args->channel_ctx, ctx,
+ XA_LIMIT(1, U32_MAX), GFP_KERNEL);
+ if (err < 0) {
+ mutex_unlock(&fpriv->lock);
Looks like the lock was never taken.
Thanks, will fix.
+ goto put_channel;
+ }
+
+ ctx->client = client;
+ xa_init_flags(&ctx->mappings, XA_FLAGS_ALLOC);
Why not XA_FLAGS_ALLOC1?
Will fix as well.
Mikko
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