Re: [PATCH] [crypto] load the SHA1[1|256] module by an alias (v2)

[Sebastian Siewior <linux-crypto@ml.breakpoint.cc>]

* Herbert Xu | 2007-10-05 23:10:51 [+0800]:

>BTW, the dead-lock does exist after all.  The lock that's held
>is the user-space file lock held by modprobe.  Assuming that
>padlock-sha comes before sha in the alias list, then the second
>modprobe will hit padlock-sha again and dead-lock.

I tried to deadlock and I did not succeed, maybe I did something wrong.

# fgrep sha modules.alias 
alias sha256 padlock_sha
alias sha1 padlock_sha
alias sha384 sha512
alias sha256 sha256_generic
alias sha1 sha1_generic

padlock comes first as you said. A "modprobe tcrypt mode=2" worked fine
(with the test passed).

# lsmod |grep sha
sha1_generic            3008  0 
padlock_sha             4160  0 
crypto_algapi          13824  4
sha1_generic,padlock_sha,blkcipher,cryptomgr

I have a version of the padlock-sha driver with no HW dependency
(fallback only, that one I used) at

  git://git.breakpoint.cc/bigeasy/linux via_sha

if you want to test :)


>Cheers,

Sebastian