drm/amd/amdgpu/amdgpu_fence: Fix some issues pertaining to function documentation

Fixes the following W=1 kernel build warning(s):

 drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c:139: warning: Function parameter or member 'flags' not described in 'amdgpu_fence_emit'
 drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c:197: warning: Function parameter or member 'timeout' not described in 'amdgpu_fence_emit_polling'
 drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c:302: warning: Function parameter or member 't' not described in 'amdgpu_fence_fallback'
 drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c:302: warning: Excess function parameter 'work' description in 'amdgpu_fence_fallback'
 drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c:320: warning: Excess function parameter 'adev' description in 'amdgpu_fence_wait_empty'
 drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c:649: warning: Function parameter or member 'f' not described in 'amdgpu_fence_enable_signaling'
 drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c:649: warning: Excess function parameter 'fence' description in 'amdgpu_fence_enable_signaling'
 drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c:684: warning: Function parameter or member 'f' not described in 'amdgpu_fence_release'
 drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c:684: warning: Excess function parameter 'fence' description in 'amdgpu_fence_release'
 drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c:749: warning: Function parameter or member 'm' not described in 'amdgpu_debugfs_gpu_recover'
 drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c:749: warning: Function parameter or member 'data' not described in 'amdgpu_debugfs_gpu_recover'

Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: "Christian König" <christian.koenig@amd.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Sumit Semwal <sumit.semwal@linaro.org>
Cc: Jerome Glisse <glisse@freedesktop.org>
Cc: amd-gfx@lists.freedesktop.org
Cc: dri-devel@lists.freedesktop.org
Cc: linux-media@vger.kernel.org
Cc: linaro-mm-sig@lists.linaro.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c

@@ -130,6 +130,7 @@ static u32 amdgpu_fence_read(struct amdgpu_ring *ring)
  *
  * @ring: ring the fence is associated with
  * @f: resulting fence object
+ * @flags: flags to pass into the subordinate .emit_fence() call
  *
  * Emits a fence command on the requested ring (all asics).
  * Returns 0 on success, -ENOMEM on failure.
@@ -187,6 +188,7 @@ int amdgpu_fence_emit(struct amdgpu_ring *ring, struct dma_fence **f,
  *
  * @ring: ring the fence is associated with
  * @s: resulting sequence number
+ * @timeout: the timeout for waiting in usecs
  *
  * Emits a fence command on the requested ring (all asics).
  * Used For polling fence.
@@ -294,7 +296,7 @@ bool amdgpu_fence_process(struct amdgpu_ring *ring)
 /**
  * amdgpu_fence_fallback - fallback for hardware interrupts
  *
- * @work: delayed work item
+ * @t: timer context used to obtain the pointer to ring structure
  *
  * Checks for fence activity.
  */
@@ -310,7 +312,6 @@ static void amdgpu_fence_fallback(struct timer_list *t)
 /**
  * amdgpu_fence_wait_empty - wait for all fences to signal
  *
- * @adev: amdgpu device pointer
  * @ring: ring index the fence is associated with
  *
  * Wait for all fences on the requested ring to signal (all asics).
@@ -639,7 +640,7 @@ static const char *amdgpu_fence_get_timeline_name(struct dma_fence *f)
 
 /**
  * amdgpu_fence_enable_signaling - enable signalling on fence
- * @fence: fence
+ * @f: fence
  *
  * This function is called with fence_queue lock held, and adds a callback
  * to fence_queue that checks if this fence is signaled, and if so it
@@ -675,7 +676,7 @@ static void amdgpu_fence_free(struct rcu_head *rcu)
 /**
  * amdgpu_fence_release - callback that fence can be freed
  *
- * @fence: fence
+ * @f: fence
  *
  * This function is called when the reference count becomes zero.
  * It just RCU schedules freeing up the fence.
@@ -740,7 +741,7 @@ static int amdgpu_debugfs_fence_info(struct seq_file *m, void *data)
 	return 0;
 }
 
-/**
+/*
  * amdgpu_debugfs_gpu_recover - manually trigger a gpu reset & recover
  *
  * Manually trigger a gpu reset at the next fence wait.