hwrng: ks-sa - Add minimum sleep time before ready-polling
Current polling timeout is 25 us. The hardware is currently configured to harvest the entropy for 81920 us. This leads to timeouts even during blocking read (wait=1). Log snippet: [ 5.727589] [<c040ffcc>] (ks_sa_rng_probe) from [<c04181e8>] (platform_drv_probe+0x58/0xb4) ... [ 5.727805] hwrng: no data available ... [ 13.157016] random: systemd: uninitialized urandom read (16 bytes read) [ 13.157033] systemd[1]: Initializing machine ID from random generator. ... [ 15.848770] random: fast init done ... [ 15.848807] random: crng init done After the patch: [ 6.223534] random: systemd: uninitialized urandom read (16 bytes read) [ 6.223551] systemd[1]: Initializing machine ID from random generator. ... [ 6.876075] random: fast init done ... [ 6.954200] random: systemd: uninitialized urandom read (16 bytes read) [ 6.955244] random: systemd: uninitialized urandom read (16 bytes read) ... [ 7.121948] random: crng init done Signed-off-by:Alexander Sverdlin <alexander.sverdlin@nokia.com> Signed-off-by:
Herbert Xu <herbert@gondor.apana.org.au>
parent
698b2227
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