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| author | Takashi Iwai <tiwai@suse.de> | 2014-11-20 23:46:04 +0300 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2014-11-20 23:46:04 +0300 |
| commit | a69862d8d04e4877965cc938140c9f8e6da0b827 (patch) | |
| tree | 667cace5c2fad872871e4d24d0c895664f0e0bc6 /drivers/char/hw_random/pseries-rng.c | |
| parent | 0f32fd1900e6b972f289416dbd75e92772b630cb (diff) | |
| parent | 01cb156edbbd4e6c4fd8db0d05f18c62c424f9aa (diff) | |
| download | linux-a69862d8d04e4877965cc938140c9f8e6da0b827.tar.xz | |
Merge branch 'for-linus' into test/usb-resume
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 6226aa08c36a..bcf86f91800a 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, |