linux-kernel - [PATCH] drm/vmwgfx: Use kasprintf

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Date:   Wed,  7 Mar 2018 23:33:22 +0530
From:   Himanshu Jha <himanshujha199640@...il.com>
To:     linux-graphics-maintainer@...are.com, airlied@...ux.ie
Cc:     syeh@...are.com, thellstrom@...are.com,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Himanshu Jha <himanshujha199640@...il.com>
Subject: [PATCH] drm/vmwgfx: Use kasprintf

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 <himanshujha199640@...il.com>
---
 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