diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2008-01-25 08:38:25 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-01-25 08:38:25 -0800 |
| commit | eba0e319c12fb098d66316a8eafbaaa9174a07c3 (patch) | |
| tree | b2703117db9e36bb3510654efd55361f61c54742 /drivers/char/hw_random/intel-rng.c | |
| parent | df8dc74e8a383eaf2d9b44b80a71ec6f0e52b42e (diff) | |
| parent | 15e7b4452b72ae890f2fcb027b4c4fa63a1c9a7a (diff) | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (125 commits)
[CRYPTO] twofish: Merge common glue code
[CRYPTO] hifn_795x: Fixup container_of() usage
[CRYPTO] cast6: inline bloat--
[CRYPTO] api: Set default CRYPTO_MINALIGN to unsigned long long
[CRYPTO] tcrypt: Make xcbc available as a standalone test
[CRYPTO] xcbc: Remove bogus hash/cipher test
[CRYPTO] xcbc: Fix algorithm leak when block size check fails
[CRYPTO] tcrypt: Zero axbuf in the right function
[CRYPTO] padlock: Only reset the key once for each CBC and ECB operation
[CRYPTO] api: Include sched.h for cond_resched in scatterwalk.h
[CRYPTO] salsa20-asm: Remove unnecessary dependency on CRYPTO_SALSA20
[CRYPTO] tcrypt: Add select of AEAD
[CRYPTO] salsa20: Add x86-64 assembly version
[CRYPTO] salsa20_i586: Salsa20 stream cipher algorithm (i586 version)
[CRYPTO] gcm: Introduce rfc4106
[CRYPTO] api: Show async type
[CRYPTO] chainiv: Avoid lock spinning where possible
[CRYPTO] seqiv: Add select AEAD in Kconfig
[CRYPTO] scatterwalk: Handle zero nbytes in scatterwalk_map_and_copy
[CRYPTO] null: Allow setkey on digest_null
...
Diffstat (limited to 'drivers/char/hw_random/intel-rng.c')
| -rw-r--r-- | drivers/char/hw_random/intel-rng.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/drivers/char/hw_random/intel-rng.c b/drivers/char/hw_random/intel-rng.c index 753f46052b8..5cc651ef75e 100644 --- a/drivers/char/hw_random/intel-rng.c +++ b/drivers/char/hw_random/intel-rng.c @@ -29,6 +29,7 @@ #include <linux/module.h> #include <linux/pci.h> #include <linux/stop_machine.h> +#include <linux/delay.h> #include <asm/io.h> @@ -162,11 +163,19 @@ static inline u8 hwstatus_set(void __iomem *mem, return hwstatus_get(mem); } -static int intel_rng_data_present(struct hwrng *rng) +static int intel_rng_data_present(struct hwrng *rng, int wait) { void __iomem *mem = (void __iomem *)rng->priv; - - return !!(readb(mem + INTEL_RNG_STATUS) & INTEL_RNG_DATA_PRESENT); + int data, i; + + for (i = 0; i < 20; i++) { + data = !!(readb(mem + INTEL_RNG_STATUS) & + INTEL_RNG_DATA_PRESENT); + if (data || !wait) + break; + udelay(10); + } + return data; } static int intel_rng_data_read(struct hwrng *rng, u32 *data) |