[PATCH] hwrng: rockchip: propagate reset errors

[Pengpeng Hou]

rk_rng_probe() pulses the optional or required reset array before
registering
the hardware RNG, but discards errors from both reset operations.

Return reset failures before publishing the RNG device.

Fixes: 8eff8eb83fc0 ("hwrng: rockchip - add support for rk3588's standalone TRNG")
Signed-off-by: Pengpeng Hou <pengpeng at iscas.ac.cn>
---
 drivers/char/hw_random/rockchip-rng.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/char/hw_random/rockchip-rng.c b/drivers/char/hw_random/rockchip-rng.c
index 6e3ed4b856051..ff98fcdc68911 100644
--- a/drivers/char/hw_random/rockchip-rng.c
+++ b/drivers/char/hw_random/rockchip-rng.c
@@ -412,9 +412,14 @@ static int rk_rng_probe(struct platform_device *pdev)
 		if (IS_ERR(rst))
 			return dev_err_probe(dev, PTR_ERR(rst), "Failed to get reset property\n");
 
-		reset_control_assert(rst);
+		ret = reset_control_assert(rst);
+		if (ret)
+			return ret;
+
 		udelay(2);
-		reset_control_deassert(rst);
+		ret = reset_control_deassert(rst);
+		if (ret)
+			return ret;
 	}
 
 	platform_set_drvdata(pdev, rk_rng);

base-commit: 08dbfad3f5040f5bdb6c529da20d6d4e81fefd72
-- 
2.50.1