crypto: atmel-{aes,sha} - Fix incorrect use of dmaengine_terminate_all()

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device_terminate_all() is used to abort all the pending and
ongoing transfers on the channel, it should be used just in the
error path.

Also, dmaengine_terminate_all() is deprecated and one should use
dmaengine_terminate_async() or dmaengine_terminate_sync(). The method
is not used in atomic context, use dmaengine_terminate_sync().

A secondary aspect of this patch is that it luckily avoids a deadlock
between atmel_aes and at_hdmac.c. While in tasklet with the lock held,
the dma controller invokes the client callback (dmaengine_terminate_all),
which tries to get the same lock. The at_hdmac fix would be to drop the
lock before invoking the client callback, a fix on at_hdmac will follow.

Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

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Tudor Ambarus 2019-12-13 09:54:42 +00:00 • committed by Herbert Xu

parent 7d07de2c18

commit 0e69378940

2 changed files with 2 additions and 31 deletions

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32

drivers/crypto/atmel-aes.c

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1

drivers/crypto/atmel-sha.c

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