crypto: Make hifn_795x build depend on !ARCH_DMA_ADDR_T_64BIT

hifn_795x works only on 32 bit, remove the detection while loading
the module and catch non-32 bit systems at build time.

Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

2 files changed, 3 insertions, 4 deletions

diff --git a/drivers/crypto/Kconfig b/drivers/crypto/Kconfig
index 4ac6d4d2bd14..6d16b4b0d7a0 100644
--- a/drivers/crypto/Kconfig
+++ b/drivers/crypto/Kconfig
@@ -200,6 +200,7 @@ config CRYPTO_DEV_HIFN_795X
         select CRYPTO_BLKCIPHER
         select HW_RANDOM if CRYPTO_DEV_HIFN_795X_RNG
         depends on PCI
+        depends on !ARCH_DMA_ADDR_T_64BIT
         help
           This option allows you to have support for HIFN 795x crypto adapters.
 
diff --git a/drivers/crypto/hifn_795x.c b/drivers/crypto/hifn_795x.c
index a84250a5dd51..fe765f49de58 100644
--- a/drivers/crypto/hifn_795x.c
+++ b/drivers/crypto/hifn_795x.c
@@ -2744,10 +2744,8 @@ static int __init hifn_init(void)
         unsigned int freq;
         int err;
 
-        if (sizeof(dma_addr_t) > 4) {
-                printk(KERN_INFO "HIFN supports only 32-bit addresses.\n");
-                return -EINVAL;
-        }
+        /* HIFN supports only 32-bit addresses */
+        BUILD_BUG_ON(sizeof(dma_addr_t) != 4);
 
         if (strncmp(hifn_pll_ref, "ext", 3) &&
             strncmp(hifn_pll_ref, "pci", 3)) {