diff options
| author | Mark Brown <broonie@kernel.org> | 2014-11-22 11:07:49 +0000 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2014-11-22 11:07:49 +0000 |
| commit | 7280e4222be4e88e2e8dd3cf797f093ffaebfb8b (patch) | |
| tree | 0c70042dff00ef136c449ae922e48b660b17c272 /drivers/char/hw_random/pseries-rng.c | |
| parent | 3070bdc3c302c80996502639e03a2e550571e152 (diff) | |
| parent | 1f0f80ecae848b0ca2ca632e94568721494f09f0 (diff) | |
Merge branch 'linux-linaro-lsk-v3.14' into linux-linaro-lsk-v3.14-androidlsk-v3.14-android-14.11
Diffstat (limited to 'drivers/char/hw_random/pseries-rng.c')
| -rw-r--r-- | drivers/char/hw_random/pseries-rng.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/drivers/char/hw_random/pseries-rng.c b/drivers/char/hw_random/pseries-rng.c index ab7ffdec0ec3..f38f2c13e79c 100644 --- a/drivers/char/hw_random/pseries-rng.c +++ b/drivers/char/hw_random/pseries-rng.c @@ -25,18 +25,21 @@ #include <asm/vio.h> -static int pseries_rng_data_read(struct hwrng *rng, u32 *data) +static int pseries_rng_read(struct hwrng *rng, void *data, size_t max, bool wait) { + u64 buffer[PLPAR_HCALL_BUFSIZE]; + size_t size = max < 8 ? max : 8; int rc; - rc = plpar_hcall(H_RANDOM, (unsigned long *)data); + rc = plpar_hcall(H_RANDOM, (unsigned long *)buffer); if (rc != H_SUCCESS) { pr_err_ratelimited("H_RANDOM call failed %d\n", rc); return -EIO; } + memcpy(data, buffer, size); /* The hypervisor interface returns 64 bits */ - return 8; + return size; } /** @@ -55,7 +58,7 @@ static unsigned long pseries_rng_get_desired_dma(struct vio_dev *vdev) static struct hwrng pseries_rng = { .name = KBUILD_MODNAME, - .data_read = pseries_rng_data_read, + .read = pseries_rng_read, }; static int __init pseries_rng_probe(struct vio_dev *dev, |