[PATCH -next] drm/tinydrm: Use kmemdup rather than duplicating its implementation in repaper_spi_transfer()

[YueHaibing <yuehaibing@xxxxxxxxxx>]

use kmemdup rather than duplicating its implementation

Signed-off-by: YueHaibing <yuehaibing@xxxxxxxxxx>
---
 drivers/gpu/drm/tinydrm/repaper.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/tinydrm/repaper.c b/drivers/gpu/drm/tinydrm/repaper.c
index 07f45a0..54d6fe0 100644
--- a/drivers/gpu/drm/tinydrm/repaper.c
+++ b/drivers/gpu/drm/tinydrm/repaper.c
@@ -108,12 +108,11 @@ static int repaper_spi_transfer(struct spi_device *spi, u8 header,
 
 	/* Stack allocated tx? */
 	if (tx && len <= 32) {
-		txbuf = kmalloc(len, GFP_KERNEL);
+		txbuf = kmemdup(tx, len, GFP_KERNEL);
 		if (!txbuf) {
 			ret = -ENOMEM;
 			goto out_free;
 		}
-		memcpy(txbuf, tx, len);
 	}
 
 	if (rx) {