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authorLee Jones <lee.jones@linaro.org>2015-10-07 12:23:28 (GMT)
committerHerbert Xu <herbert@gondor.apana.org.au>2015-10-08 13:42:24 (GMT)
commit93d649bd94e1003e2a766a59fadba0cc0089d58b (patch)
tree7fb8674ff57d4e9f2c59d902be96dfe0ffeab551 /crypto
parent8fd80f8ca60bdeda4f3098986e8a566ba9c0c57a (diff)
downloadlinux-93d649bd94e1003e2a766a59fadba0cc0089d58b.tar.xz
hwrng: st - Use real-world device timings for timeout
Samples are documented to be available every 0.667us, so in theory the 8 sample deep FIFO should take 5.336us to fill. However, during thorough testing, it became apparent that filling the FIFO actually takes closer to 12us. Also take into consideration that udelay() can behave oddly i.e. not delay for as long as requested. Suggested-by: Russell King <rmk+kernel@arm.linux.org.uk>: "IIRC, Linus recommends a x2 factor on delays, especially timeouts generated by these functions. Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto')
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