From: Vladis Dronov vdronov@redhat.com
[ Upstream commit 32547a6aedda132907fcd15cdc8271429609f216 ]
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 vdronov@redhat.com Signed-off-by: Herbert Xu herbert@gondor.apana.org.au Signed-off-by: Sasha Levin sashal@kernel.org --- 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 dd226630b67d..a01e9307737c 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;