2018-03-12 18:57:55

by Sinclair Yeh

[permalink] [raw]
Subject: Re: [PATCH] drm/vmwgfx: Use kasprintf

Thanks!

Reviewed-by: Sinclair Yeh <[email protected]>

On Wed, Mar 07, 2018 at 11:33:22PM +0530, Himanshu Jha wrote:
> Use kasprintf instead of combination of kmalloc and sprintf. Also,
> remove the local variables used for storing the string length as they
> are not required now.
>
> Signed-off-by: Himanshu Jha <[email protected]>
> ---
> drivers/gpu/drm/vmwgfx/vmwgfx_msg.c | 13 +++----------
> 1 file changed, 3 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_msg.c b/drivers/gpu/drm/vmwgfx/vmwgfx_msg.c
> index 9700099..cdff992 100644
> --- a/drivers/gpu/drm/vmwgfx/vmwgfx_msg.c
> +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_msg.c
> @@ -328,7 +328,7 @@ int vmw_host_get_guestinfo(const char *guest_info_param,
> {
> struct rpc_channel channel;
> char *msg, *reply = NULL;
> - size_t msg_len, reply_len = 0;
> + size_t reply_len = 0;
> int ret = 0;
>
>
> @@ -338,15 +338,12 @@ int vmw_host_get_guestinfo(const char *guest_info_param,
> if (!guest_info_param || !length)
> return -EINVAL;
>
> - msg_len = strlen(guest_info_param) + strlen("info-get ") + 1;
> - msg = kzalloc(msg_len, GFP_KERNEL);
> + msg = kasprintf(GFP_KERNEL, "info-get %s", guest_info_param);
> if (!msg) {
> DRM_ERROR("Cannot allocate memory to get %s", guest_info_param);
> return -ENOMEM;
> }
>
> - sprintf(msg, "info-get %s", guest_info_param);
> -
> if (vmw_open_channel(&channel, RPCI_PROTOCOL_NUM) ||
> vmw_send_msg(&channel, msg) ||
> vmw_recv_msg(&channel, (void *) &reply, &reply_len) ||
> @@ -388,7 +385,6 @@ int vmw_host_log(const char *log)
> {
> struct rpc_channel channel;
> char *msg;
> - int msg_len;
> int ret = 0;
>
>
> @@ -398,15 +394,12 @@ int vmw_host_log(const char *log)
> if (!log)
> return ret;
>
> - msg_len = strlen(log) + strlen("log ") + 1;
> - msg = kzalloc(msg_len, GFP_KERNEL);
> + msg = kasprintf(GFP_KERNEL, "log %s", log);
> if (!msg) {
> DRM_ERROR("Cannot allocate memory for log message\n");
> return -ENOMEM;
> }
>
> - sprintf(msg, "log %s", log);
> -
> if (vmw_open_channel(&channel, RPCI_PROTOCOL_NUM) ||
> vmw_send_msg(&channel, msg) ||
> vmw_close_channel(&channel)) {
> --
> 2.7.4
>