Encrypt selftest fails with qat_c3xxx

[Georg Sauthoff]

Hello,

running Fedora 27 on an Intel Atom C3758 CPU Supermicro system
(A2SDi-8C+-HLN4F) I've noticed that crypto selftests fail when the
qat_c3xxx module is loaded (it is loaded, by default). That means that
stuff like `modprobe dm-crypt`, `cryptsetup benchmark` and `cryptsetup
luksOpen` fail.

The kernel log then contains the following messages:

alg: akcipher: encrypt test failed. err -22
alg: akcipher: test 1 failed for pkcs1pad(qat-rsa,sha256), err=-22

When I blacklist the qat_c3xxx/intel_qat modules the crypto works
as expected.

I can reproduce this issue with 4.14.3-300.fc27.x86_64,
kernel-4.13.16-302.fc27.x86_64 and kernel-4.13.9-300.fc27.x86-64.

See also my report in the Fedora bug tracker:

https://bugzilla.redhat.com/show_bug.cgi?id=1522962#c5

The loaded firmware has this checksum:

md5sum /lib/firmware/qat_c3xxx_mmp.bin
fb7deea913d87aed7676222269a593e6  /lib/firmware/qat_c3xxx_mmp.bin

Is this an issue with the driver, the firmware or does the QAT
co-processor need some additional setup?

Best regards
Georg
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