Separate mutual exclusion for commands and ping

1 files changed, 4 insertions, 4 deletions

diff --git a/surface.c b/surface.c
index 87304ab..27e1eae 100644
--- a/surface.c
+++ b/surface.c
@@ -22,13 +22,13 @@ long draw_lines(struct file *filp, unsigned long arg)
 	param = (struct doomdev_surf_ioctl_draw_lines *) arg;
 	lines = (struct doomdev_line *) param->lines_ptr;
 
-	mutex_lock(&surface_data->doom_data->mutex);
+	mutex_lock(&surface_data->doom_data->cmd_mutex);
 
 	for (i = 0; i < param->lines_num; i++) {
 		draw_line(surface_data, lines[i]);
 	}
 
-	mutex_unlock(&surface_data->doom_data->mutex);
+	mutex_unlock(&surface_data->doom_data->cmd_mutex);
 
 	return param->lines_num;
 }
@@ -58,7 +58,7 @@ 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->mutex);
+	mutex_lock(&surface_data->doom_data->ping_mutex);
 	ping_sync(surface_data->doom_data->iomem);
 
 	down(&surface_data->doom_data->pong_sem);
@@ -68,7 +68,7 @@ ssize_t surface_read(struct file *filp, char __user *buf, size_t count,
 
 	*offset += count - not_written;
 
-	mutex_unlock(&surface_data->doom_data->mutex);
+	mutex_unlock(&surface_data->doom_data->ping_mutex);
 
 	return count - not_written;
 }