On Wed, Jan 22, 2025 at 03:41:29PM +0300, Alexey Romanov wrote: > > Why? I couldn't find this explanation anywhere. Because the digest function can be called from atomic contexts, such as networking. > In addition, I found an example of one of the digest functions that is sleeping [1]. > > Links: > > - [1] https://elixir.bootlin.com/linux/v6.12.6/source/drivers/crypto/mxs-dcp.c#L804 That driver is just broken. If you look through the git history, you'll find that a similar problem was fixed by replacing the mutex with a spinlock in the cipher path. Unfortunately the same fix hasn't been extended to hashing in mxs-dcp. Cheeers, -- Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
