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subsys: random: xoroshiro128: Use entropy get isr during init

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Current implementation of the xoroshiro depends on the ISR being
triggered when the interrupts is locked. This patch proposes
implementing the init with entropy_get_isr. This implementation
can be called at PRE_KERNEL_2 stage, even when the interrupts
are locked.

Fixes: GH-8199

Signed-off-by: Adithya Baglody <adithya.nagaraj.baglody@intel.com>
This commit is contained in:
Adithya Baglody 2018-09-04 14:41:48 +05:30 • committed by Anas Nashif
commit 984ce023cc
1 changed files with 11 additions and 1 deletions
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12
subsys/random/rand32_xoroshiro128.c
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@ -58,7 +58,17 @@ static int xoroshiro128_initialize(struct device *dev)
return -EINVAL;
}
if (entropy_get_entropy(dev, (uint8_t *)&state, sizeof(state)) < 0) {
s32_t rc = entropy_get_entropy_isr(dev, (uint8_t *)&state,
sizeof(state), ENTROPY_BUSYWAIT);
if (rc == -ENOTSUP) {
/* Driver does not provide an ISR-specific API, assume it can
* be called from ISR context
*/
rc = entropy_get_entropy(dev, (u8_t *)&state, sizeof(state));
}
if (rc < 0) {
return -EINVAL;
}