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Subject[char-misc-next 3/5] mei: hbm: remove variable length arrays
Date
Though VLA are supported by CC99 there are many cavities
and should be avoided.

'const size_t len = sizeof()' that we used may not be set
at the compile time hence generating VLA code.

This fixes also sparse warning
warning: Variable length array is used type.

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
---
drivers/misc/mei/hbm.c | 29 ++++++++++++++---------------
1 file changed, 14 insertions(+), 15 deletions(-)

diff --git a/drivers/misc/mei/hbm.c b/drivers/misc/mei/hbm.c
index ba3a774c8d71..fe6595fe94f1 100644
--- a/drivers/misc/mei/hbm.c
+++ b/drivers/misc/mei/hbm.c
@@ -166,9 +166,8 @@ void mei_hbm_cl_hdr(struct mei_cl *cl, u8 hbm_cmd, void *buf, size_t len)
*
* Return: 0 on success, <0 on failure.
*/
-static inline
-int mei_hbm_cl_write(struct mei_device *dev, struct mei_cl *cl,
- u8 hbm_cmd, u8 *buf, size_t len)
+static inline int mei_hbm_cl_write(struct mei_device *dev, struct mei_cl *cl,
+ u8 hbm_cmd, void *buf, size_t len)
{
struct mei_msg_hdr mei_hdr;

@@ -632,11 +631,11 @@ static int mei_hbm_stop_req(struct mei_device *dev)
*/
int mei_hbm_cl_flow_control_req(struct mei_device *dev, struct mei_cl *cl)
{
- const size_t len = sizeof(struct hbm_flow_control);
- u8 buf[len];
+ struct hbm_flow_control req;

cl_dbg(dev, cl, "sending flow control\n");
- return mei_hbm_cl_write(dev, cl, MEI_FLOW_CONTROL_CMD, buf, len);
+ return mei_hbm_cl_write(dev, cl, MEI_FLOW_CONTROL_CMD,
+ &req, sizeof(req));
}

/**
@@ -710,10 +709,10 @@ static void mei_hbm_cl_tx_flow_ctrl_creds_res(struct mei_device *dev,
*/
int mei_hbm_cl_disconnect_req(struct mei_device *dev, struct mei_cl *cl)
{
- const size_t len = sizeof(struct hbm_client_connect_request);
- u8 buf[len];
+ struct hbm_client_connect_request req;

- return mei_hbm_cl_write(dev, cl, CLIENT_DISCONNECT_REQ_CMD, buf, len);
+ return mei_hbm_cl_write(dev, cl, CLIENT_DISCONNECT_REQ_CMD,
+ &req, sizeof(req));
}

/**
@@ -726,10 +725,10 @@ int mei_hbm_cl_disconnect_req(struct mei_device *dev, struct mei_cl *cl)
*/
int mei_hbm_cl_disconnect_rsp(struct mei_device *dev, struct mei_cl *cl)
{
- const size_t len = sizeof(struct hbm_client_connect_response);
- u8 buf[len];
+ struct hbm_client_connect_response resp;

- return mei_hbm_cl_write(dev, cl, CLIENT_DISCONNECT_RES_CMD, buf, len);
+ return mei_hbm_cl_write(dev, cl, CLIENT_DISCONNECT_RES_CMD,
+ &resp, sizeof(resp));
}

/**
@@ -763,10 +762,10 @@ static void mei_hbm_cl_disconnect_res(struct mei_device *dev, struct mei_cl *cl,
*/
int mei_hbm_cl_connect_req(struct mei_device *dev, struct mei_cl *cl)
{
- const size_t len = sizeof(struct hbm_client_connect_request);
- u8 buf[len];
+ struct hbm_client_connect_request req;

- return mei_hbm_cl_write(dev, cl, CLIENT_CONNECT_REQ_CMD, buf, len);
+ return mei_hbm_cl_write(dev, cl, CLIENT_CONNECT_REQ_CMD,
+ &req, sizeof(req));
}

/**
--
2.9.3
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