[PATCH v2] drm/amd/display: Remove unnecessary casts in amdgpu_dm_helpers.c

[Srinivasan Shanmugam]

Fixes the following category of checkpatch complaints:

WARNING: unnecessary cast may hide bugs, see http://c-faq.com/malloc/mallocnocast.html
+               char *buf = (char *)kvcalloc(total, sizeof(char), GFP_KERNEL);

Cc: Rodrigo Siqueira <Rodrigo.Siqueira at amd.com>
Cc: Aurabindo Pillai <aurabindo.pillai at amd.com>
Signed-off-by: Srinivasan Shanmugam <srinivasan.shanmugam at amd.com>
---

v2: 
 - updated commit message
 - Initialized char *buf = NULL; in the beginning of the func

 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
index cd20cfc04996..dfa3de065182 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
@@ -373,6 +373,7 @@ void dm_dtn_log_append_v(struct dc_context *ctx,
 	va_list args;
 	size_t total;
 	int n;
+	char *buf = NULL;
 
 	if (!log_ctx) {
 		/* No context, redirect to dmesg. */
@@ -400,7 +401,7 @@ void dm_dtn_log_append_v(struct dc_context *ctx,
 	total = log_ctx->pos + n + 1;
 
 	if (total > log_ctx->size) {
-		char *buf = (char *)kvcalloc(total, sizeof(char), GFP_KERNEL);
+		buf = kvcalloc(total, sizeof(char), GFP_KERNEL);
 
 		if (buf) {
 			memcpy(buf, log_ctx->buf, log_ctx->pos);
-- 
2.25.1