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authorOleksij Rempel <o.rempel@pengutronix.de>2017-03-22 10:14:37 +0100
committerSascha Hauer <s.hauer@pengutronix.de>2017-03-30 08:23:20 +0200
commitef4144b4ab6301d7417af3eb4d79cfc66bf0e731 (patch)
treeec4cbb3881a8265937bf18acc066541e415c1ff5 /common/password.c
parent35ca79bb22b64c4fc78691743ce42379c29fd247 (diff)
downloadbarebox-ef4144b4ab6301d7417af3eb4d79cfc66bf0e731.tar.gz
crypto: caam - fix RNG buffer cache alignment
this is alternate version of linux fix: --------------------------------------------------------------------- | commit 412c98c1bef65fe7589f1300e93735d96130307c | Author: Steve Cornelius <steve.cornelius@freescale.com> | Date: Mon Jun 15 16:52:59 2015 -0700 | | crypto: caam - fix RNG buffer cache alignment | | The hwrng output buffers (2) are cast inside of a a struct (caam_rng_ctx) | allocated in one DMA-tagged region. While the kernel's heap allocator | should place the overall struct on a cacheline aligned boundary, the 2 | buffers contained within may not necessarily align. Consenquently, the | ends of unaligned buffers may not fully flush, and if so, stale data will be | left behind, resulting in small repeating patterns. | | This fix aligns the buffers inside the struct. | | Note that not all of the data inside caam_rng_ctx necessarily needs to | be DMA-tagged, only the buffers themselves require this. However, a fix | would incur the expense of error-handling bloat in the case of allocation | failure. | | Cc: stable@vger.kernel.org | Signed-off-by: Steve Cornelius <steve.cornelius@freescale.com> | Signed-off-by: Victoria Milhoan <vicki.milhoan@freescale.com> | Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> --------------------------------------------------------------------- instead we will use just dma_alloc() Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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