crypto: inside-secure - avoid unmapping DMA memory that was not mapped

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commit c957f8b3e2 upstream.

This patch adds a parameter in the SafeXcel ahash request structure to
keep track of the number of SG entries mapped. This allows not to call
dma_unmap_sg() when dma_map_sg() wasn't called in the first place. This
also removes a warning when the debugging of the DMA-API is enabled in
the kernel configuration: "DMA-API: device driver tries to free DMA
memory it has not allocated".

Fixes: 1b44c5a60c ("crypto: inside-secure - add SafeXcel EIP197 crypto engine driver")
Signed-off-by: Antoine Tenart <antoine.tenart@free-electrons.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Antoine Tenart 2017-12-26 17:21:16 +01:00 • committed by Greg Kroah-Hartman

parent cb06c7a568

commit e02e32d0b7

1 changed files with 12 additions and 8 deletions

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drivers/crypto/inside-secure/safexcel_hash.c

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