drm/tinydrm: Use kmemdup rather than duplicating its implementation in repaper_spi_tr...

use kmemdup rather than duplicating its implementation

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
Link: https://patchwork.freedesktop.org/patch/msgid/1543471233-159568-1-git-send-email-yuehaibing@huawei.com

diff --git a/drivers/gpu/drm/tinydrm/repaper.c b/drivers/gpu/drm/tinydrm/repaper.c
index 07f45a008a0f7c208b2f88b4b0a3d536e9e9b3db..54d6fe0f37ce8b2a72133027d4a313bd4458557c 100644 (file)
--- 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) {