Update synchronization

2 files changed, 3 insertions, 2 deletions

diff --git a/harddoomdev.c b/harddoomdev.c
index 067293e..30c37fe 100644
--- a/harddoomdev.c
+++ b/harddoomdev.c
@@ -46,6 +46,7 @@ void send_command(struct doom_data *doom_data, uint32_t command)
 	free = doomdev_read(doom_data->iomem, HARDDOOM_FIFO_FREE);
 	if (free == 0) {
 		deactivate_intr(doom_data->iomem, HARDDOOM_INTR_PONG_ASYNC);
+		free = doomdev_read(doom_data->iomem, HARDDOOM_FIFO_FREE);
 	}
 
 	if (free == 0) {
diff --git a/surface.c b/surface.c
index cbb9406..13b0e6b 100644
--- a/surface.c
+++ b/surface.c
@@ -267,7 +267,7 @@ ssize_t surface_read(struct file *filp, char __user *buf, size_t count,
 		count = surface_data->surface_size - *offset;
 	}
 
-	mutex_lock(&surface_data->doom_data->cmd_mutex);
+	mutex_lock(&surface_data->doom_data->ping_mutex);
 	ping_sync(surface_data->doom_data);
 	down(&surface_data->doom_data->pong_sem);
 
@@ -276,7 +276,7 @@ ssize_t surface_read(struct file *filp, char __user *buf, size_t count,
 
 	*offset += count - not_written;
 
-	mutex_unlock(&surface_data->doom_data->cmd_mutex);
+	mutex_unlock(&surface_data->doom_data->ping_mutex);
 
 	return count - not_written;
 }