On Thu, Aug 18, 2016 at 01:37:21PM +0100, Daniel Thompson wrote: > Currently, very few RNG drivers support single byte reads using the > ->read() interface. Of the 14 drivers in drivers/char/hw_random that > support this interface only three of these actually support max == 1. > The other behaviours vary between return 0, return 2, return 4 and return > -EIO). > > This is not a problem in practice because the core hw_random code never > performs a read shorter than 16 bytes. The documentation for this function > already contrains the alignment of the buffer pointer, so let's also > guarantee that the buffer is at least as large as its alignment. > > This constraint is intended to be the weakest guarantee neccessary to > allow driver writers to safely simplify their code. > > Signed-off-by: Daniel Thompson <daniel.thompson@xxxxxxxxxx> Patch applied. Thanks. -- Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt -- To unsubscribe from this list: send the line "unsubscribe linux-crypto" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
