[PATCH v5 1/5] i3c: ccc: Add actual_len to struct i3c_ccc_cmd_payload

[tze . yee . ng]

From: Adrian Ng Ho Yin <adrian.ho.yin.ng@xxxxxxxxxx>

Add actual_len to struct i3c_ccc_cmd_payload so drivers can report how
many bytes were received on a GET CCC without overwriting the requested
buffer length in len.

Signed-off-by: Adrian Ng Ho Yin <adrian.ho.yin.ng@xxxxxxxxxx>
Signed-off-by: Tze Yee Ng <tze.yee.ng@xxxxxxxxxx>
---
Changes in v5:
- Split from v4 patch 1/3: ccc.h only; no driver changes in this patch.
---
 include/linux/i3c/ccc.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/include/linux/i3c/ccc.h b/include/linux/i3c/ccc.h
index ad59a4ae60d1..d8052949e57e 100644
--- a/include/linux/i3c/ccc.h
+++ b/include/linux/i3c/ccc.h
@@ -343,11 +343,13 @@ struct i3c_ccc_getxtime {
 /**
  * struct i3c_ccc_cmd_payload - CCC payload
  *
- * @len: payload length
+ * @len: requested payload length
+ * @actual_len: number of bytes received on a GET CCC (filled by the driver)
  * @data: payload data. This buffer must be DMA-able
  */
 struct i3c_ccc_cmd_payload {
 	u16 len;
+	u16 actual_len;
 	void *data;
 };
 
-- 
2.43.7