ram: rk3399: Fix .set_rate_index() error handling

Functions pointed to by this op pointer can return non-zero values
indicating an error.  Ensure any error value is propagated back up the
call-chain.

Signed-off-by: Lee Jones <lee@kernel.org>
Tested-by: Xavier Drudis Ferran <xdrudis@tinet.cat>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>

diff --git a/drivers/ram/rockchip/sdram_rk3399.c b/drivers/ram/rockchip/sdram_rk3399.c
index 8b4d52529244201ce706773331b6e63bbf336931..5faff396410cd790183602279f4390e96533af45 100644 (file)
--- a/drivers/ram/rockchip/sdram_rk3399.c
+++ b/drivers/ram/rockchip/sdram_rk3399.c
@@ -3005,7 +3005,9 @@ static int sdram_init(struct dram_info *dram,
        params->base.stride = calculate_stride(params);
        dram_all_config(dram, params);
 
-       dram->ops->set_rate_index(dram, params);
+       ret = dram->ops->set_rate_index(dram, params);
+       if (ret)
+               return ret;
 
        debug("Finish SDRAM initialization...\n");
        return 0;