redonkable/alistair23-linux
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hwrng: Remove check for max less than 4 bytes

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HW RNG core never asks for data less than 4 bytes. The check whether max
is less than 4 bytes is unnecessary. Remove the check.

Signed-off-by: PrasannaKumar Muralidharan <prasannatsmkumar@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
PrasannaKumar Muralidharan 2016-08-27 00:02:04 +05:30 committed by Herbert Xu
parent 27c4d548af
commit 68734bc9f5
2 changed files with 0 additions and 6 deletions
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3
drivers/char/hw_random/meson-rng.c
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@ -76,9 +76,6 @@ static int meson_rng_read(struct hwrng *rng, void *buf, size_t max, bool wait)
struct meson_rng_data *data = struct meson_rng_data *data =
container_of(rng, struct meson_rng_data, rng); container_of(rng, struct meson_rng_data, rng);
if (max < sizeof(u32))
return 0;
*(u32 *)buf = readl_relaxed(data->base + RNG_DATA); *(u32 *)buf = readl_relaxed(data->base + RNG_DATA);
return sizeof(u32); return sizeof(u32);

3
drivers/char/hw_random/st-rng.c
View file

@ -54,9 +54,6 @@ static int st_rng_read(struct hwrng *rng, void *data, size_t max, bool wait)
u32 status; u32 status;
int i; int i;
if (max < sizeof(u16))
return -EINVAL;
/* Wait until FIFO is full - max 4uS*/ /* Wait until FIFO is full - max 4uS*/
for (i = 0; i < ST_RNG_FILL_FIFO_TIMEOUT; i++) { for (i = 0; i < ST_RNG_FILL_FIFO_TIMEOUT; i++) {
status = readl_relaxed(ddata->base + ST_RNG_STATUS_REG); status = readl_relaxed(ddata->base + ST_RNG_STATUS_REG);