From 32547a6aedda132907fcd15cdc8271429609f216 Mon Sep 17 00:00:00 2001 From: Vladis Dronov Date: Wed, 13 Apr 2022 16:16:06 +0200 Subject: [PATCH] hwrng: cn10k - Make check_rng_health() return an error code Currently check_rng_health() returns zero unconditionally. Make it to output an error code and return it. Fixes: 38e9791a0209 ("hwrng: cn10k - Add random number generator support") Signed-off-by: Vladis Dronov Signed-off-by: Herbert Xu --- drivers/char/hw_random/cn10k-rng.c | 15 +++++++-------- 1 file changed, 7 insertions(+), 8 deletions(-) diff --git a/drivers/char/hw_random/cn10k-rng.c b/drivers/char/hw_random/cn10k-rng.c index dd22663..a01e930 100644 --- a/drivers/char/hw_random/cn10k-rng.c +++ b/drivers/char/hw_random/cn10k-rng.c @@ -31,26 +31,23 @@ struct cn10k_rng { #define PLAT_OCTEONTX_RESET_RNG_EBG_HEALTH_STATE 0xc2000b0f -static int reset_rng_health_state(struct cn10k_rng *rng) +static unsigned long reset_rng_health_state(struct cn10k_rng *rng) { struct arm_smccc_res res; /* Send SMC service call to reset EBG health state */ arm_smccc_smc(PLAT_OCTEONTX_RESET_RNG_EBG_HEALTH_STATE, 0, 0, 0, 0, 0, 0, 0, &res); - if (res.a0 != 0UL) - return -EIO; - - return 0; + return res.a0; } static int check_rng_health(struct cn10k_rng *rng) { u64 status; - int err; + unsigned long err; /* Skip checking health */ if (!rng->reg_base) - return 0; + return -ENODEV; status = readq(rng->reg_base + RNM_PF_EBG_HEALTH); if (status & BIT_ULL(20)) { @@ -58,7 +55,9 @@ static int check_rng_health(struct cn10k_rng *rng) if (err) { dev_err(&rng->pdev->dev, "HWRNG: Health test failed (status=%llx)\n", status); - dev_err(&rng->pdev->dev, "HWRNG: error during reset\n"); + dev_err(&rng->pdev->dev, "HWRNG: error during reset (error=%lx)\n", + err); + return -EIO; } } return 0; -- 2.7.4