mei: Avoid the use of one-element arrays

One-element arrays are being deprecated[1]. Replace the one-element
arrays with a simple value type u8 reserved, once this is just a
placeholder for alignment.

Also, while there, use the preferred form for passing a size of a struct.
The alternative form where struct name is spelled out hurts readability
and introduces an opportunity for a bug when the variable type is changed
but the corresponding sizeof that is passed as argument is not.

[1] https://github.com/KSPP/linux/issues/79

Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/20200714214516.GA1040@embeddedor
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/misc/mei/hbm.c b/drivers/misc/mei/hbm.c
index a44094c..f020d55 100644 (file)
--- a/drivers/misc/mei/hbm.c
+++ b/drivers/misc/mei/hbm.c
@@ -408,14 +408,14 @@ static int mei_hbm_add_cl_resp(struct mei_device *dev, u8 addr, u8 status)
 {
        struct mei_msg_hdr mei_hdr;
        struct hbm_add_client_response resp;
-       const size_t len = sizeof(struct hbm_add_client_response);
+       const size_t len = sizeof(resp);
        int ret;
 
        dev_dbg(dev->dev, "adding client response\n");
 
        mei_hbm_hdr(&mei_hdr, len);
 
-       memset(&resp, 0, sizeof(struct hbm_add_client_response));
+       memset(&resp, 0, len);
        resp.hbm_cmd = MEI_HBM_ADD_CLIENT_RES_CMD;
        resp.me_addr = addr;
        resp.status  = status;

diff --git a/drivers/misc/mei/hw.h b/drivers/misc/mei/hw.h
index b1a8d5e..8c0297f 100644 (file)
--- a/drivers/misc/mei/hw.h
+++ b/drivers/misc/mei/hw.h
@@ -346,13 +346,13 @@ struct hbm_add_client_request {
  * @hbm_cmd: bus message command header
  * @me_addr: address of the client in ME
  * @status: if HBMS_SUCCESS then the client can now accept connections.
- * @reserved: reserved
+ * @reserved: reserved for alignment.
  */
 struct hbm_add_client_response {
        u8 hbm_cmd;
        u8 me_addr;
        u8 status;
-       u8 reserved[1];
+       u8 reserved;
 } __packed;
 
 /**
@@ -461,7 +461,7 @@ struct hbm_notification {
        u8 hbm_cmd;
        u8 me_addr;
        u8 host_addr;
-       u8 reserved[1];
+       u8 reserved;
 } __packed;
 
 /**