mmc: rockchip_sdhci: Correct error checking

A pointer can not be negative. Use macro IS_ERR_OR_NULL() for checking.

Signed-off-by: Haolin Li <li.haolin@qq.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>

diff --git a/drivers/mmc/rockchip_sdhci.c b/drivers/mmc/rockchip_sdhci.c
index 1fdc841..9608770 100644 (file)
--- a/drivers/mmc/rockchip_sdhci.c
+++ b/drivers/mmc/rockchip_sdhci.c
@@ -227,7 +227,7 @@ static int rk3399_emmc_get_phy(struct udevice *dev)
        }
 
        grf_base = syscon_get_first_range(ROCKCHIP_SYSCON_GRF);
-       if (grf_base < 0) {
+       if (IS_ERR_OR_NULL(grf_base)) {
                printf("%s Get syscon grf failed", __func__);
                return -ENODEV;
        }