From 946fef4e14ebc2f14ab05f54789843621fe87f60 Mon Sep 17 00:00:00 2001 From: Herbert Xu Date: Sat, 26 Jan 2008 09:48:44 +1100 Subject: [PATCH] [CRYPTO] hifn795x: Disallow built-in hifn795x when HW_RANDOM is m Currently it is possible to select HW_RANDOM as a module and have hifn795x built-in. This causes a build problem because hifn795x will then call hwrng_register which isn't built-in. This patch introduces a new config option to control the hifn795x RNG which lets us avoid this problem. Signed-off-by: Herbert Xu --- drivers/crypto/Kconfig | 8 +++++++- drivers/crypto/hifn_795x.c | 6 +++--- 2 files changed, 10 insertions(+), 4 deletions(-) diff --git a/drivers/crypto/Kconfig b/drivers/crypto/Kconfig index 74bd599dfb..8a70a9edab 100644 --- a/drivers/crypto/Kconfig +++ b/drivers/crypto/Kconfig @@ -88,10 +88,16 @@ config CRYPTO_DEV_HIFN_795X select CRYPTO_DES select CRYPTO_ALGAPI select CRYPTO_BLKCIPHER + select HW_RANDOM if CRYPTO_DEV_HIFN_795X_RNG depends on PCI help This option allows you to have support for HIFN 795x crypto adapters. - +config CRYPTO_DEV_HIFN_795X_RNG + bool "HIFN 795x random number generator" + depends on CRYPTO_DEV_HIFN_795X + help + Select this option if you want to enable the random number generator + on the HIFN 795x crypto adapters. endif # CRYPTO_HW diff --git a/drivers/crypto/hifn_795x.c b/drivers/crypto/hifn_795x.c index 16413e5759..dfbf24c403 100644 --- a/drivers/crypto/hifn_795x.c +++ b/drivers/crypto/hifn_795x.c @@ -463,7 +463,7 @@ struct hifn_device unsigned int pk_clk_freq; -#if defined(CONFIG_HW_RANDOM) || defined(CONFIG_HW_RANDOM_MODULE) +#ifdef CRYPTO_DEV_HIFN_795X_RNG unsigned int rng_wait_time; ktime_t rngtime; struct hwrng rng; @@ -795,7 +795,7 @@ static struct pci2id { } }; -#if defined(CONFIG_HW_RANDOM) || defined(CONFIG_HW_RANDOM_MODULE) +#ifdef CRYPTO_DEV_HIFN_795X_RNG static int hifn_rng_data_present(struct hwrng *rng, int wait) { struct hifn_device *dev = (struct hifn_device *)rng->priv; @@ -880,7 +880,7 @@ static int hifn_init_pubrng(struct hifn_device *dev) dprintk("Chip %s: RNG engine has been successfully initialised.\n", dev->name); -#if defined(CONFIG_HW_RANDOM) || defined(CONFIG_HW_RANDOM_MODULE) +#ifdef CRYPTO_DEV_HIFN_795X_RNG /* First value must be discarded */ hifn_read_1(dev, HIFN_1_RNG_DATA); dev->rngtime = ktime_get(); -- 2.39.5